Title of Invention	A DEVICE FOR CONTROLLING A CURSOR TO ROTATE RIGHTWARDS AND LEFTWSRDS
Abstract	The present invention is related to a device for controlling a cursor to rotate rightwards and leftwards and the method thereof, wherein a X axis sliding bar and a Y axis sliding bar are installed between the cover and base of said mouse, and said X axis sliding bar and said Y axis sliding bar are used as the X axis movable optic grid and the Y axis movable optic grid respectively, said X axis movable optic grid and said Y axis movable optic grid will rotate with said base within a proper angle When said cover of said mouse is moved or rotated, said X axis movable optic grid and said Y axis movable optic grid will move or rotate synchronously and match the installation of a light emitted diode, a photo transistor, fixing optic grids and a controlling circuit so that the cursor on the computer display may be controlled with a small active range.

Title of Invention

A DEVICE FOR CONTROLLING A CURSOR TO ROTATE RIGHTWARDS AND LEFTWSRDS

Abstract

The present invention is related to a device for controlling a cursor to rotate rightwards and leftwards and the method thereof, wherein a X axis sliding bar and a Y axis sliding bar are installed between the cover and base of said mouse, and said X axis sliding bar and said Y axis sliding bar are used as the X axis movable optic grid and the Y axis movable optic grid respectively, said X axis movable optic grid and said Y axis movable optic grid will rotate with said base within a proper angle When said cover of said mouse is moved or rotated, said X axis movable optic grid and said Y axis movable optic grid will move or rotate synchronously and match the installation of a light emitted diode, a photo transistor, fixing optic grids and a controlling circuit so that the cursor on the computer display may be controlled with a small active range.

Full Text	BACKGROUND OF THE INVENTION 1 Field of the Invention The present invention is related to a device for controlling a cursor to rotate rightwards and leftwards and the method thereof, especially to a cursor controlling device for rotating a X axis movable optic grid and a Y axis movable optic grid to a proper angle, further, said cursor may be moved intendedly 2 Description of the prior Art The cursor controlling technique in the conventional computer display comprises a keyboard, a mouse, a trace ball, a touch controlling display, a optical pen. etc However, it is generally inconvenient to control the movement and positioning of a cursor by using the conventional cursor controlling devices For example, it is ineffective to use a conventional keyboard to drive a cursor While if a conventional mouse is used to control the movement of the cursor, the mouse must be moved on the table and accordingly the arm is also moved, wherein the movement of twist will drive the moving of the front arm, subsequently, the rear arm is also moved. in consequently, the frequent movement of arm is not met the requirement of Ergonomios, therefore for a long period of usage the arm will has an ache easily US patent No 4 9.15.728 disclosed a square opening 136a formed on a top plate 134a of the outer case 132a as shown in Fig 1. The square opening 136a servers as margin for the finger-grippable element. The photo encoder includes a series of mask sections and transparent sections interleavely. In case the photo encoder with phase A and phase B is required to generate 320 phase signals per inch ( not includes the central portion), the minimum distance with a mask section and a transparent section on the photo encoder will be 0.16mm( 25 1mm/160 -0 .16mm) In 2 consideration of the 90 degrees phase difference between the phases A and B, the distance will be equal to 0 08mm The narrow displacement nears a maximum tolerant range during operation Further, when the hardware sends out a pulse signal, it must displace a travel length of 0 08mm It will require rather precise movement to generate 320 pixels signal within a distance ranges of 25 4mm It is therefore noted that the prior art patent requires precise parallel structure for configuring the square opening and photo encoder in manufacture and assembly Otherwise, each dot on the square opening in Y-axis direction will have an incorrect X-axis margin value, similarly, each dot on the square opening in X-axis direction will have an incorrect Y-axis margin value To match the different resolution of the various display, for example 800600 or 12801204, the following various methods are possible 1 increasing the size of the finger controllable member, or 2 decreasing the distance between each mask section and transparent section on the photo encoder The former method will tire the user due to the length of the finger controllable member is increased, especially the operating range is limited in left and right direction in movement. The second method above will has problem that it can not correctly generate a signal at each moving tune because that the distance is decreased causing a small effective displacement Moreover, it is possible to cause a problem that the pointing device generates two or three pulse signals at each moving time 1 he design of shorten the distance of photo encoder can reduce the operating ranges of user hand during moving the finger controllable member, and it is especially applicable in use of remote controller for a multi-media system with more convenience and comfort, if the moving range of the finger controllable member is smaller then 16mm, then the moving of the lingers will be confined dramatically 3 STATEMENT OF THE INVENTION Accordingly, the present invention provides a device for controlling a cursor to rotate rightwards and leftwards comprising an upper case (10), including an upper case cover (11) and an upper case base board (12), wherein the upper case cover having input keys (111) for pressing respective contacting switches (121), and wherein the upper case cover (11) includes locking lugs (112) that engage with said upper case base board, a central body (20) including a cover (21) and a base (22), wherein the base (22) has a circular disk bottom and an engaging means for engaging with the cover (21) of the central body (20), between the cover (21) and the base (22) being installed a X-axis sliding bar (23) and a Y-axis sliding bar serving respectively as a X-axis movable optic grid and a Y-axis movable optic grid, a transparent and an opaque X-axis photo grid zone (231) and two axis sliding blocks (232) being included on the X-axis movable optic grid, a transparent and an opaque Y-axis photo grid zone (241) and two axis sliding blocks (242) being included on the Y-axis movable optic grid, two light emitting diodes (2211 and 2221) are provided on the cover of the central body, wherein the cover further includes an X-axis photo transistor (221) and a Y-axis photo transistor (222) on each of which a fixed optic grid is disposed, wherein a peripheral portion of the base includes a first pair of U-shaped slots (223) which allow the X-axis movable optic grid (23) to slide therethrough and a second pair of U-shaped slots (224) which allow the Y-axis movable optic grid to slide therethrough, and wherein a plurality of snap hooks (225) are provided below said base, and a lower case (30) including a lower case cover (31), a lower case base board (32) and a control circuit board (33) located between the lower case cover and the lower case base board, wherein the lower case cover, the lower case base board and the control circuit board include central round hole (311, 321 and 331 respectively) defined therein A SUMMARY OF THE INVENTION In order to overcome said defect in the conventional device, a absolute coordinate positioning device is disclosed The inventor of the present invention has disclosed some inventions, for example, Taiwan Patent Application Nos 84205828 and 84295829, title "Mechanical optic absolute coordinate cursor controlling device (1), (2)," and the PCT International Patent Nos PCTCN950042, and PCTCN950043, and afterward another inventions are disclosed, Taiwan Patent Application Nos 84217771, title " Cursor Positioning Device," and Taiwan Patent Application Nos 85208588, title " An Improvement Structure of a Cursor Positioning Device" The present invention is a further improvement about said inventions " Cursor Positioning Device,' and " An Improvement Structure of a Cursor Positioning Device" The present invention is related to a device for controlling a cursor to rotate rightwards and leftwards and the method thereof, wherein a X axis sliding bar and a Y axis sliding bar are installed between the cover and base of said mouse, and said X axis sliding bar and said Y axis sliding bar are used as the X axis movable optic grid and the Y axis movable optic grid, respectively, said X axis movable optic grid and said Y axis movable optic grid will rotate with said base within a proper angle When said cover of said mouse is moved or rotated, said X axis movable optic grid and said Y axis movable optic grid will move or rotate synchronously and match the installation of a light emitted diode, a photo transistor, fixing optic grids and a controlling circuit so that the cursor on the computer display may be controlled with a small active range BRIEF DESCRIPTION OF THE. DRAWINGS The invention, as well as its many advantages, may be further understood by the following description and drawings in which fig 1 is a schematic view of the computer input device of the prior art, Fig 2 is a exploded view of the components of the first embodiment 5 of the present invention, Fig 3 is a elevational perspective view of the base of the central body in the first embodiment of the present invention, Fig 4 is a partial assembly perspective view of the first embodiment of the present invention, Fig 5 is a partial assembly perspective view of the first embodiment of the present invention, Fig 6 is the assembled perspective view of the first embodiment of the present invention, Fig 7 is a exploded view of the components in the second embodiment of the present invention, Fig 8 is a structural view wherein the central body of the second embodiment of the present invention is substituted by a cylinder, Fig 9A,C are the schematic view of the embodiment of the present invention, Fig 10A, B are the schematic view of the embodiment of the present invention, Fig 11A-C arc the schematic view of the mouse in the prior art. Fig 12A-F shows the photo structure and waveform for the two sots of photo transistor detection used in the positioning device of the present invention, Fig 13A-D shows the photo structure for detection used in the positioning device of the present invention, Fig 14 shows the application circuit of the photo transistor for detecting the two sets of photoelectric structure in Fig 12, Fig 15A-E is the flow diagram for detecting the two sets of photo transistors, Fig 16 is the flow diagram for the boundary interruption program, Fig 17A is the flow diagram for the H1 subprogram of Fig 15D, Fig 17B is the flow diagram for the H2 subprogram of Fig 15D, Fig 18A-D is the driving program of the computer, DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Figs 12A to I2F show the structure and signal waveform of the photo encoder and the photo detector in accordance with the pointing device of the present invention This embodiment uses two photo transistors to detect the light beam of a LED The photo encoder 4 has two printed pattern lines as shown in Fig 12A Both the printed attem line has a series of mask sections and transparent sections interleavely with uniform width, but with 90 degrees phase difference therebetween When the photo encoder 4 is moved relative to the photo detector 6 as shown in Fig 12C, the light generated by the LED 61 will be detected by the photo detector 63 via the photo encoder 4 and the calibrating photo encoder 62 Therefore, the photo detector 63 generates a series of binary pulse signals and transmits the signals to the control circuit board 18 Under performance of the control circuit as shown in Fig 14 and the control flows as shown in Figs 15A to 15C, the moving direction of the photo encoder may be detected according to the binary pulse signals Another, it shows that one end of the X-axis photo encoder 4 has a transparent end section 4C1, and the other end thereof has a mask end section 4C2 The purpose of the transparent and mask end section is to serve as a left margin Xmin and a right margin Xmax of the X-axis photo encoder Similarly, the Y-axis photo encoder has a left margin and a right margin. It is to be understood from this arrangement that the margin are obtained directly from the photo encoder capable of providing digital form signal Obviously, the present invention is different from the prior art, and it is easier to design a control program for determination Alternately, the photo encoder 4 in said Fig 12A may has an end section 4C3 combining a transparent line and a mask line as shown in Fig 12F, instead of the end section 4C1 and 4C2 shown in Fig 12A In performance, both the signals XA and XI3 will be changed its phase at the same time after reaching the margin of the photo encoder 4 and exceeding a distance of 1/4 period On the contrary, the phase of signal XA or XB will be changed when it does not reach the margin of the photo encoder So, the control circuit of the present invention may detect whether the phase of the signals XA and XB is changed at the same time to determine whether the photo encoder reaches its margin or not Table 1 is a state table which shows when a computer system connected with the cursor positioning device of the present invention receives the signals XA and XB, the computer can determine the moving direction X+ or X- of the positioning device according to the binary value of the signals XA and XB The computer may get a flag Xmax and a flag Xmin according to the signal X+ and X- respectively, and then store the status of the flags into a register Refering to Fig 12B again, it shows a perspective view of the X-axis photo detector 6 suitable to use the photo encoder as shown in Fig I2A The photo detector is composed of a LED 61, a fixed calibrating photo encoder 62, and a photo transistor 63 The arrangement of the components of the photo detector and the movable photo encoder 4 is illustrated in Fig 12C As shown in the drawing, the photo encoder 4 is arranged between the fixed calibrating photo encoder 62 and the LED 61 Therefore, the light beam transmitted by the LED 61 may either reach to the photo transistor 63 via the movable photo encoder 4 or be obstructed by the photo encoder The fixed calibrating photo encoder 62 has a series of printed patterns including transparent sections and mask sections interleavely as shown in Fig 12D, and the width of the printed pattern is designed to correspond to that of the movable photo encoder 4. In a preferred embodiment of the present invention, the movable photo encoder 4 is very closed to the fixed calibrating photo encoder 62, so that the light beam generated by the LLD 61 reaches the photo transistor 63 through the movable photo encoder 4 without light diffusion Fig 12E shows a series of pulse signals XA and XB generated by the photo detector assembly It is noted that the movable photo encoder 4 of the present invention is equipped with interleaved printed patterns and the movable photo encoder 4 is designed to close to the fixed photo encoder 62 in space when moving, capable of generating a series of ON and OFF signals Due to this special design, the pitch of the encoder is possible to reach 320 patterns per inch The prior art requires laser beam LEDs to get the effect of high density pitch, otherwise the conventional photo detector will has series light diffusion problem These prior art problems can be simply overcame by the present invention Fig 14 is a detail control circuit diagram with four sets of photo detecting circuits, with reference to the photo detector shown in Fig 12 In this embodiment, the X-axis phase signals are detected by two photo detecting circuit 81 and 81a The first X-axis photo detecting circuit 81 includes a LED 6la lor generating a light beam which will be detected by the photo transistors 63a and 63b The second X-axis photo detecting circuit 81a includes a LED 61b for generating a light beam which will be detected by the photo transistors 63c and 63d The Y-axis phase signals are detected by two photo detecting circuit 82 and 82a The first Y-axis photo detecting circuit 82 includes a LED 71a for generating a light beam which will be detected by the photo transistors 73a and 73b I he second Y-axis photo detecting circuit 82a includes a LED 71b for generating a light beam which will be detected by the photo transistors 73c and 73d The detected X-axis and Y-axis phase signals are supplied to a processing circuit 83 for further processes A switch circuit 84 are electrically connected to the processing circuit 83, which includes a left switch 1 la, a right switch 12b, and a middle switch 13c. The control circuit is provided with a voltage regulating circuit 85 for supplying a stable power source An output circuit 86 is used to amplify the output signal supplied from the processing circuit 83 and then supply the amplified output signal to a host computer (not shown) via transmission lines Referring to Fig 15A, the computer first set the transmission rate, start bit, end bit, and data length of the communication port RS232 in step F2, followed by performing system initialization step F1 ln step F3, all flag status, registers, and associated value for determination of operating speed are cleared Thereafter, the computer reads the digital value of the phase signals XA, XB, YA, and YB, and finds out corresponding value of the X+, X-, Xmax, and Xmin from the state table of TABLE I as listed previously( only show the state of X-axis), and then stores the values for further comparison The computer will reads the values XA, XB, YA, and YB again in step F5, and then compares these values with the first read values, to determine whether the status is changed or not If the status is not changed, it indicates the finger controllable member of the cursor positioning device has no movement, and the procedure will return to read the XA, XB, YA, and YB again. On the contrary, if the status is changed, a X-mode determination procedure outlined by dot line as shown in Fig 15A, is performed There are four possible status i e (0,0), (1,0), (1,1), and (0,1) to be compared with the previous status. The computer may get the information about the moving speed of the cursor positioning device by calculating the time of changing of the various status Typically, the system clock of the computer is ranged from 4 to 8 MHz nowadays In practice, it is found that the normal operating speed that the user moves the finger controllable member of the cursor positioning device is below 5KHz Therefore, the computer may easily detect the operating speed of the cursor positioning device The computer may determine the position of the cursor with reference to TABLE I above and the pulse signal listed in Fig 12E At first, the computer supposes the previous status is (0,0) in step F9. In case that XA=1 and XB=0, it indicates the finger controllable member is moved to direction X+, while in case that XA-0 and XB=1, it indicates the finger controllable member is moved to direction X- In case that XA=1 and XB=1, it indicates the finger controllable member either Y?aches a 10 minimum limit or maximum limit dependent on whether the flag X+flag is set or not After these determinations, various flag status X+, Xmin, Xman, etc are obtained, and then these flag status are accumulated in predetermined registers for further judgment for the control program So, in practical operation, the user just simply moves the finger controllable member to the left upper corner of the device to perform zero position initialization, and then the device can generate correct X-axis and Y-axis absolute coordinate values Fig 15D is a subprogram flow chart of the control program, explaining how the cursor is moved to positive direction, while Fig 15E is a subprogram flow chart of the control program, explaining how the cursor is moved to the other direction The displacement of the cursor moving on the computer display is proportional to the moving distance of the finger controllable member The factor of the proportion depends on the moving speed of the finger controllable member The purposes of these procedures are as follows 1 To limit the displacement of the finger controllable member to a range about 16mm or less Inspitefully, the movement of the cursor reptesenting on the computer display is not effected by the shorten displacement, and the different moving speed of the finger controllable member So, the present invention is impossible has problems of the prior art that the finger controllable member already reaches a margin of the positioning device but the cursor not reaches a corresponding margin on the computer screen not the finger controllable member not yet reaches a margin of the positioning device but the cursor already reaches a margin on the computer screen 2 When the cursor on the display moves to any desired position thereon, there are necessary fine displacements around the position 3 The moving speed and located position of the cursor on the display can always match that of the finger controllable member, resulting of a smooth, fast, and precise movement in operation 11 4 The finger controllable member in each axis, for example X- axis, has two registers for positive directional performance and two registers for negative directional performance The respective value recorded in the positive and negative registers is mutual associated, so that the finger controllable member may return to its original point and the cursor on the display may also return to its original point The various symbols used in the control program flow chart are defined in TABLE11 The VX represents the moving speed of the finger controllable member, changing among at least two different moving speeds, such as V1, V2, V3, and so on Different proportional factor K are appointed to correspond to the different moving speeds That is, the factor K is a constant representing that the displacement of the cursor moving on the display is proportional to the detected displacement of the finger controllable member on the effective area of the positioning device for example, factors K1 and K2 may be various combinations, such as (1,2), (1,3), (1,4), (2,4), and so on, wherein the value of Kl and K2 may be a default value as a parameter for device driver program, which is selected by the user. It is therefore possible to determine the displacements C1 and C2 with reference to formula 1 and formula listed above, at both the first speed level and the second speed level In a preferred embodiment, C1 and C2 may be a default parameter according to the resolution of the computer display used When the resolution of the display is increased, the scale of the constant value K2 may be increased correspondingly, so that the cursor can be moved in a fine displacement operating mode which can match the minimum pixel displacement requirements of various display resolutions In such case, due to K2 is increased in accordance with the increment of the display resolution, the minimum pixel displacement is correspondingly decreased As result, the movement of the cursor on the display is very smooth Example 12 Supposing that the display resolution at X-axis of the display is 640, the displacement of the photo encoder is about 15 68 (i e 1960 08mm), 640 =(l+Cl)+(4cursor2), K1 = l, K2=4 196=C1+C2 C2=148, C1=48 In case that the display resolution at X-axis of the display is 1024, 1024 =(I+Cl)+(7cursor2), Kl=l, K2=7 196=C1+C2 C2=138, C1=58 When the display resolution is increased from 640 to 1024, the distance from pixel to pixel is decreased So, in spite of K2 being changed from 4 to 7 it will not effect the smooth performance of the cursor moving on the display In fine operation mode, the cursor can be moved at precise displacement from pixel to pixel on the display, no matter the change of the display resolution To reduce the distance between the optic grids C3, instade of reducing the the illumination and the distance for each lattice, the lattice number is reduced (in the prior art, it is reduced from 320 to 200), thus it is umpossible that the finger controllable member is only moved one lattice, but the display cursor is moved two or three lattice Therefore, if is appreciated from the description hereinablve, if the finger controlling controlling element want to move within a range samaller than 16mm from pixel to pixel, the present equation must be used, and by changing the value of recorder and the constant K. a cursor controlling device which is moved on an area of 10mm X 8mm may be derived another, said device may be used to control any point from the cursor to the display. In the a small movement cursor controlling device, C1 = 15, C2=27,and C3=113 (1X15-5X27- 10x113- 1280). In such a design, the distance between the optic grids of x axis = (15+27+113) X0 08mm -12mm, the distance between the optic grids of Y axis = 1024/1280 X 13 12mm=10mm, thus the length of said finger controllable member may be reduced to 25mm, or further to 20mm to suit the operation of thumb Fig 15D is a subprogram flow chart of the control program, explaining how the cursor is moved to a positive direction, while Fig 15E is a subprogram flow chart of the control program explaining how the cursor is moved to the other direction, represented as H1 and H2 respectively in Fig 15A When the finger controllable member is moved in positive direction, the value stored in positive directional registers VIXl+reg and V2X2+reg will be increased Correspondingly, the value stored in negative directional registers V1X1-reg and V2X2-reg will be decreased in accordance with the increment of the positive directional registers When X-axis coordinate is minimum, the value stored in register V1X1+reg is 0, V1X1-reg is equal to value of C1, V2X2+reg is 0, and V2X2-reg is equal to value of C2, when X-axis coordinate is maximum, the value stored in register VIXl+reg is equal to value of C1, V1X1-reg is 0, V2X2+reg is equal to value of C2, and V2X2-reg is 0. The moved displacement of the finger controllable member at the third speed level is transferred to temporary values V1X1+ and V2X2+ by using formulas 4 and 5 listed in TABLE III Thereafter, the temporary values are stored in registers V1X1-reg and V2X2+reg respectively, and then the value of reference constant K.3 may be calculated by using formula 2 listed in TABLE III After these procedures, the finger controllable member may correctly return to original position, and the cursor on the display may also correctly return to original position For example K1 = 1, K2=4 K3=(n-l)K2-(n-2)K1 =(3-l)4-(3-2)1 = 7 The result indicates that in case the displacement of the finger controllable member is equal 1, the movement of the cursor on display will be equal to 7 Then, the displacement of the finger controllable member at the third speed level may be transferred and stored in registers VIXl+reg and V2X2+reg by using formulas 4 and 5 listed in TABLE III K3V3X3+ =K2V2X2++K1V1X1 V3X3+ -V2X2++V1X1 + 71 =4V2X2++V1X1 + 1=V2X2++VIX1 + V2X2+=+2,VlXl+=-l It is noted, in this case, the increment of V2X2+reg is 2, and the decrement of VIXl+reg is 1 The result indicates that the value stored in registers V2X2+reg and VIXl+reg at positive direction (I e , V2X2+reg +V1X1+reg =2+(-l) - 1) is match the real displacement of the finger controllable member at the third speed level Further, formula 3 (K1cursor1) + (K2cursor2) = the displacement of the display K1XV1X1+ieg + K2VV2X2+reg = the displacement of the display thatis,(l-l) + (42)=7 It indicates the same result that the displacement of the cursor on display is equal to 7 when the finger controllable member is moved at the third speed level The displacement of the finger controllable member at the third speed level is transferred into temporary values V2X2+ and V1X1 + by formulas 4 and 5 listed in TABLE III, and then the temporary values are stored in registers V2X2+reg and V1X1+reg respectively It is obviously that the moving speed and positioning of the cursor on display may match that of the finger controllable member in accordance with the present invention, with advantage of smooth, fast, stable, and 15 precise moving performance The cursor positioning device of the present invention is provided with two positive directional registers and two negative directional registers. The value stored in the positive directional registers and the negative directional registers is always mutual associated, so that the finger controllable member may correctly return to original position and also the cursor may correctly return to original position correspondingly It is noted that since the finger controllable members of the positive directional registers and the negative directional registers on X axis are mutual association The definition of the positive directional registers and the negative directional registers in X axis is only for the purpose of better understanding Alternatively, it is also possible to use two positive registers to achieve the same performance After the main program finishes the determination procedure in direction X+ as described above, the procedure determines whether VX is less than or equal to a predetermined reference speed in step F41 of Fig 15D If yes, it indicates the speed of the finger controllable member is less than a lower limit speed V1, ie the first speed level In step F42, it further determines whether the value stored in register V1X1-rsg of the first speed level is larger than or equal to a constant CI If no, the displacement of the cursor is set to be proportional to that of the finger controllable member times a constant K1, and then in step F43 increasing the value of V1X1+reg, decreasing the value of V1X1-reg, and transmitting the value to computer If the value stored in register VIXl+reg of the first speed level is larger than or equal to a constant CI, it indicates the VIXl+reg reaches a maximum value In such a case, the displacement of the cursor will be set to be proportional to that of the finger controllable member times a constant K2, and then in step F46 increasing the value of V2X2+reg , decreasing the value of V2X2-reg, and transmitting the value to computer 16 If the result in step F41 is no, it indicates that the finger controllable member is at an upper limit of the reference speed V1. In step F44, it further judges whether VX is at an upper limit or at a lower limit of the reference speed V2 In case VX is at an lower limit of V2, a step F45 is performed to judge whether the value stored in the register V2X2+reg is maximum value or not If yes, the displacement of the cursor will be set to be proportional to that of the finger controllable member times a constant K1; if no, the displacement of the cursor will be set to be proportional to the displacement of the finger controllable member times a constant K2 In case that only three speed levels are presented in the cursor positioning device, the terminal symbols A and B are combined together In this case, if the result in step F44 is no, the step F47 is performed to read the left count remained in the positive register V2X2+reg. If the value of K2V2X2-reg is less than that of K3, the displacement of the cursor will be set to be proportional to that of the finger controllable member times a constant K2, and then the procedure flows to step F46 to avoid a situation that the cursor value exceeds over the display margin when the performing speed of the cursor positioning device exceeds that of the reference speed V2. This also avoid a problem that the cursor does not return to original position. If the result in step F47 is no, the step F48 is performed to judge whether the register V2X2+reg is larger than or equal to a maximum value If yes, the displacement of the cursor will be set to be proportional to that of the finger controllable member times a constant K1, if no, it indicates that the register V2X2+reg remains left value and the displacement of the finger controllable member in positive direction at the third speed level can be transferred and stored in the register V1X1+reg and V2X2+reg Then, in step F49, the procedure judges whether the amount of fine displacement in positive direction exceeds a half of the distance If no, step F46 is performed to set the displacement of the cursor proportional to the displacement of the finger controllable member times a constant K2, if yes, the procedure flows to 17 step F50, decreasing the value of V1Xl+reg , increasing the value of V1X1-reg, adding the value of V2X2+reg by 2, decreasing the value of V1X1-reg, and subtracting the value of V2X2-reg by 2 Under this procedure, when the finger controllable member is operating at the third speed level, the register VIXl+reg remains a value that is half of the constant C1 As result, when the cursor is moved to any position on the display, there are fine displacements always around the position where the cursor presents The speed parameter VX of the finger controllable member of Fig 15D is divided into three speed levels, le 0V2 Alternatively, the speed parameter VX may be divided into two speed levels, still remaining good performance described above and applicable to the most procedures of Fig 15D In this alternative embodiment, if the answer in step F41 is no, the step F47 is performed, neglecting steps F44 and F45 It means that the speed levels VI and V2 are set to be similar or the same value So, the second speed level will be neglected when the finger controllable member judges the value of VX It is also possible to detect the situation of the cursor positioning device such as key switch 13a shown in Figs 14, with amendment to the firmware In such a design, the user simply clicks the switch to enable the cursor positioning device operating at the first speed level If the user clicks the switch again, the cursor positioning device can operates at the third speed level In the third speed level, it is permitted to move the cursor on the display in fast moving operation mode Furthermore, the movement of the cursor on the display may be according to the velocity increment of the finger controlling element on a cursor area, namely, the velocity increment of said finger controlling element is used to substitute the velocity of said finger controlling element Fig 15E is a subprogram flow chart of the control program,explaining how the cursor is moved to the other direction, the control flow of which 18 is similar to that of Fig 15D may correctly return to original position correspondingly Fig 17A is a speed detecting procedure in positive direction, including various speed detecting subprograms The terminals A and B are connected to corresponding terminals A and B of Fig 15D In case that the result in step F44 is no, the procedure flows to step F61 of Fig 17A, if the result in step F61 is yes, the procedure flows to step F47 of Fig 15D. It is noted that the speed VX in positive direction uses the same control procedure at the third speed level, the forth speed level, and higher speed level In step F63, it detects whether the cursor is over the margin of the display If yes, the speed will be changed to a lower speed level to further judge whether the cursor is over the margin again The next step F64 is performed only until the cursor does not exceed the margin In step F64, it judges whether the register V2X2+reg is a maximum value If yes, the procedure returns to step F43, if no, the procedure flows to step 65 In step F65, it judges whether the register V1X1+-reg is larger than a half of the value C1. If no, the procedure flows to step 46, if yes, the procedure returns to step F66 At this time, the high speed value of the cursor poisoning device, for example at the third speed level or higher speed, is transferred into temporary values X2X2+ and V1X1+, and then storing the temporary values into the registers V2X2+reg and V1X1+reg respectively As result, the moving speed and positioning of the cursor on display may match that of the finger controllable member with advantage of smooth, fast, stable, and precise moving performance Fig 17B is a speed detecting procedure in negative direction, the control flow of which is similar to that of Fig 17A The Y-axis procedure is followed by the X-axis procedure, with similar control flow described above As shown in Fig 16, the process of said finger controlling element is terminated on the boundary, wherein the Xmax and Xmin generats ten interrupting signals per second, and subsequently, the Y axle mode is judge and then the process is restored Referring to FIGS 1 to 5, the embodiment one of this invention includes an upper case 10, a center body 20 and a lower case 30 The upper case 10 includes an upper case cover 11 and an upper case base board 12 The upper case cover 11 has three input keys 111 located in the left, center and right positions, and a pair of locking lugs 112 for engaging with a pair of locking slots 122 located in the upper case base board 12 The upper case base board 12 further has three contact switches 121 located under the three input keys 111 The center body 20 includes a cover 21 and a base 22 which has a circular disk bottom and has an engaging means for locking the cover 21 Between the cover 21 and the base 22, there are provided with a X-axis sliding bar 23 and a Y-axis sliding bar 24 which are served respectively as a X-axis movable optic grid and a X-axis movable optic grid. On the X-axis movable optic grid 23, there is provided with a transparent and opaque X-axis photo grid zone 231, and a X-axis sliding block 232 on each of the two ends Y-axis movable optic grid 24 also has a transparent and opaque Y-axis photo grid zone 241, and Y-axis sliding blocks 242 at both ends Inside the cover 21, there are two light emitting diodes 211, 212 In the base 22, there are a X-axis photo transistor 221 and a Y-axis photo transistor 222 each of which has respectively a stationary photo grid 2211 and 2221 disposed thereon In an upward peripheral flange an the base 22, trete are two pairs of U-shaped slots 223 and 224 allowing the X-axis movable optic grid 23 and Y-axis movable optic grid 24 to slide therethrough respectively. Under the base 22, there are snap hooks 225 The lower case 30 includes a lower case cover 31 and a lower case base board 32 with a control circuit board 33 located therebetween and screwed together. The lower case cover 31 and the circuit board 33 have a circular opening 311 and 331 formed in the center The circuit 20 board 33 has electronic components such as resistors, capacitors, inductors, transistors and integrated circuits (ICs) disposed thereon The four corners of the circuit board 33 are cut away to form "otches The lower case base board 32 has a plural number of curve-shaped concave slots 321 to form a substantially annular ring When in use, the X-axis sliding bar 23 and the Y-axis sliding bar 24 can be slidably moved respectively through the slots 223 and 224 without interfering with each other as shown in FIG 1 A-A of the slots cross section The lower case cover 31 also has a circular opening 311 in the center The circular opening 311 has a smaller diameter at the lower portion than the upper portion In the first embodiment of the present invention, the circular disk base 22 is disposed in the circular opening 311 and the top surface of the disk is equal to or lower than the top surface of the lower case cover 31. The disk base 22 further has a protrusive circular body 226 formed below the bottom surface for reducing the friction when the disk base 22 is rotating The snap hook 225 under the disk base 22 could engage with the opening 311 and thus preventing the base 22 from separating with the lower case cover 31 The bottom of the hooks 225 may be slidably moved in the concave slot 321 of the lower case base board 32 In the first embodiment of the present invention, under the disk base 22, there are a plural number of studs 227 which can be slidably moved in the concave slot 321 Thus the concave slot 321 of the lower case base board 32 may be used to control the rotation angle of the center body 20 As an alternative, the stud 227 may be disposed on the lower case base board 32 while the concave slot 321 may be formed under the bottom of the disk base 22 of the center body 20 FIG 7 shows embodiment two of this invention It includes a upper case 40, a center body 50 and a lower case 60 The upper case 40 includes an upper case cover 41 and an upper case base board 42. The upper case 41 has three input keys 411 aligning in 21 left, center and right, and a pair of locking lugs 412 engageable with a pair of locking slots 421 located in the upper case base board 42 The center body 50 include a cover 51 which is formed in substantially square shape and a base 52 which has concave slot means 53 an the top engageable with the cover 51, and a circular disk at the bottom The concave slot means 53 has four peripheral upward flanges each has an U shape slot 531,532 formed therein respectively and being symmetrically faced each other Between the cover 51 and the base 53 there is a X-axis sliding bar 54 slidably moveable through the slots 531, and a Y-axis sliding bar 55 slidably moveable through the slots 532 The X-axis sliding bar 54 and the Y-axis sliding 55 has respectively a pair of sliding blocks 541 and 551 at two ends there of, and has respectively a linear slot 542 and 552 formed in the top axially for housing a rope 56 therein The X-axis sliding bar 54 and Y-axis sliding bar 55 are linked respectively via the rope 56 to a X-axis movable optic grid 631 and a Y-axis movable optic grid 632 located in a control circuit board 63 The rope 56 is shielded in a protection tube 561 The lower case 60 includes a lower case cover 61 and a lower case base board 62 with the control circuit board 63 located therebetween The lower case corer 61 and the lower case base board 62 are screwed together. The lower case base board 62 has a bearing 622 housed in a bearing seat 621 located in the center of the bottom and has concave bottom space 623 for housing the control circuit board 63 The control circuit board 63 includes (1) a X-axis movable optic grid 631 which has transparent and opaque photo grid zone 6311 located therein, and a hollow shaft 6312 concentrically disposed thereon '1 he hollow shaft 6312 has the rope 56 winds around thereof for rotating the X-axis movable optic grid 631. The hollow shaft 6312 is engaged with a shaft 6313 and a bearing 6314 located on the control circuit board 63 Said rope 56 is enclosed by a protecting tube 561 (2) A Y-axis movable optic grid 652 has transparent and opaque photo grid zone 6321 located therein, and a hollow shaft 6322 concentrically disposed thereon. The hollow shaft 6322 has the rope 56 winds around thereof for rotating the Y- axis movable optic grid 632 The hollow shaft 6322 is engaged with a shaft 6323 and a bearing 6324 located on the control circuit board 63, said rope 56 is enclosed by a proteting tube 561 (3)The X-axis photo electric means 633 has a light emitting diode 6331 located thereabove and a photo transistor 6332 located thererbelon The photo transistor 6332 has a stationary photo grid 6333 disposed thereon The photo electric means 633 further has a central slot formed therein for the X-axis movable optic grid 631 to slide therethrough (4) The Y-axis photo electric means 634 has a light emitting diode 6341 located thereabove and a photo transistor 6342 located therebelow The photo transistor 6342 has a stationary photo grid 6343 disposed thereon 1 he photo eclectic means 634 further has a central slot formed therein for the Y-axis movable optic grid 632 to slide therethrough (c)The spindle 635 has a screw hole 6351 in the center for screwing the base 52 of the center body 50 thereon with a screw 6352 The spindle 635 engages with the bearing 622 and bearing seat 621 of the lower case base board 62 (c) Circuit componets shch as resistors, capacitors, inductors, transistors, and integrated circuits A positioning device of computer cursor may be assembled form said structures (1), (2) and (3) When in use, the X-axis sliding bar 54 and Y-axis sliding bar 54 can be placed in the slot 53 of the concave slot means 53 without interfering with each other The sliding blocks 541 and 551 of the X axis sliding bar .2-3 54 and the Y axis sliding bar 55 has a cambered shape for reducing the friction force in movement As shown in the cross section A-A of Fig 2, the lower case cover 61 has a circular opening 611 in the center which has a smaller diameter in the lower portion than the upper portion The rope 56 is fixedly engaged with the hollow shafts 6312 and 6322 of the X-axis movable optic grid 631 and Y-axis movable optic grid 632 Figs 13A to 13D show a preferred photo encoder structure suitable to be used in the positioning device of the second embodiment Wherein, X axis movable optic grid 4 has a circular shape One end thereof is formed as a transparent section 4c 1, while the other end thereof is formed as a mask section 4c2, for the purpose of determining the left margin Xmin and the right margin Xmax In addition, the X axis movable optic grid 4 is composed of two circular patterns, the outer circular pattern is used to generate the signal XA and the inner circular pattern is used to generate the signal XB The margin signals in a digital form may be directly generated by detecting the movable photo encoder, so that the control program of the cursor positioning device is rather simple Here are a plurality of nose points are installed on the nm portion of the movable optic grid of the second embodiment of the present invention, while a stopping cylinder is installed on the control circuit board for controlling the rotating angle of said movable optic grid In the second embodiment of the present invention, a rope may be used to rotate the X-axis and Y-axis movable optic grids, and thus can reduce the size of the movable optic grids and the overall size of the cursor positioning apparatus A cylinder 91 may be used to substitute the central body 50 of the second embodiment of the present invention, as shown in Fig 8 In such a design, not only the thickness of the overall structure is reduced, but also it may be installed on a notebook computer, thus the controlling of movement of cursor may be attained by controlling said cylinder As shown in Figs 9A(a) and (b), the base of the mouse in the present invention is fixed on an exactly normal position, i e the mouse of the present invention is normally positioned and is pressed by palm, then the cursor will be moved from a point a to a point b horizontally on a display according to the natural direction of human (horizontal rightwards), according to the direction of Ergonomics, now the mouse held by palm will the naturally moved rightwards In said figure, the X and Y axes of the palm are the directions of the X and Y axes in the hollow portion of said movable optic grid, in consequence, in the computer display shown in Fig 9A(c), the cursor is moved from the point a to the point b to show a horizontally rightward movement As shown in Figs 9B(a) and (b), the base of the mouse in the present invention is fixed on an exactly normal position, besides, the mouse of the present invention is also inclined leftwards, then the mouse of the present invention is pressed by palm, and the cursor will be moved from the point a to the point b horizontally on a display according to the natural direction of human (horizontally rightwards), according to the direction of Ergonomics, now the mouse held by palm will naturally move upwards and leftwards In said figure, the X and Y axes of the palm are the directions of the X and Y axes in the hollow portion of said movable optic grid, in consequence, in the computer display shown in Fig 9B(c), the cursor is moved from the point a to the point b to show a horizontally rightward movement As shown in Figs 9C(a) and (b), the base of the mouse in the present invention is fixed on an exactly normal position, besides, the mouse of the present invention is also inclined rightwards, then the mouse of the present invention is pressed by palm, and the cursor will be moved form the point a to the point b horizontally on a display according to the natural direction of human (horizontally rightwards), according to the direction of Ergonomics, now the mouse held by palm will naturally move upwards and downwards. In said figure, the X and Y axes of the palm are the directions of the X and Y axes in the hollow portion of said movable optic grid, in consequence, in the computer display shown in Fig 9C(c), the cursor is moved from the point a to the point b to show a horizontally rightwards movement As shown in Figs 10A(a) and (b), the base of the mouse in the present invention is positioned rightwards, the mouse of the present invention is pressed by palm, then the cursor will be moved form the protin a to the point b horizontally on a display according to the natural direction of human (horizontal rightwards), according to the direction of Ergonomics, now the mouse held by palm will the naturally moved rightwards. In said figure, the X and Y axes of the palm are the directions of the X and Y axes in the hollow portion of said movable optic grid, in consequence, in the computer display shown in Fig 10B(c), the cursor is moved from the point a to the point b to show a horizontally rightward movement As shown in Figs 10B(a) and (b), the base of the mouse in the present invention is positioned leftwards, the mouse of the present invention is pressed by palm, then the cursor will be moved form the point a to the point b horizontally on a display according to the natural direction of human (horizontal rightwards), according to the direction of Ergonomics, now the mouse held by palm will the naturally moved rightwards In said figure, the X and Y axes of the palm are the directions of the X and Y axes in the hollow portion of said movable optic grid, in consequence, in the computer display shown in Fig 10C(c), the cursor is moved from the point a to the point b to show a horizontally rightward movement From the aforementioned description, it is apparent that in the usage of the mouse of the present invention, the natural direction of human may match with the direction of palm in Ergonomics, thus the moving direction of the cursor on the display will coincide with the natural direction of human That is, the mouse base of the present invention may be positioned as pleasure without affecting the operation of said mouse, or if the mouse of the present invention is positioned so to incline with an angle, the mouse is still operated normally, thus the function of said mouse will not be affected As shown in Figs 1 lA(a) and (b), the base of the mouse in the prior 26 art is fixed on a exactly normal position, and the mouse of the prior art is inclined leftwards and is pressed by palm, then the cursor will be moved form the point a to the point b horizontally on a display according to the natural direction of human (horizontal rightwards), according to the direction of Ergonomics, now the mouse held by palm will the naturally moved rightwards and upwards In said figure, the X and Y axes of the palm are the directions of the X and Y axes in the hollow portion of said movable optic grid, in consequence, m the computer display shown in Fig 11A(c), the cursor is moved from the point a to the point b to show a horizontally rightward and upward movement As shown in Figs 1 lB(a) and (b), the base of the mouse in the prior art is fixed to be inclined leftwards and is pressed by palm, then the cursor will be moved form the point a to the point b horizontally on a display according to the natural direction of human (horizontal rightwards), according to the direction of Ergonomics, now the mouse held by palm will the naturally moved rightwards and upwards. In said figure, the X and Y axes of the palm are the directions of the X and Y axes in the hollow portion of said movable optic grid, in consequence, in the computer display shown in Fig 1 lC(c), the cursor is moved from the point a to the point b to show a horizontally rightward and downward movement ( that is the user intends that the cursor will be moved horizontally rightly and he (or she) also operates accordingly, but the cursor on the display is moved rightwards and upwards) From the description hereinbefore, it is appreciated that in the usage of the mouse of the prior art, the natural direction of human will not match with the direction of palm in Ergonomics, thus the moving direction of the cursor on the display will not coincide with the natural direction of human Many changes and modifications in the above described embodiment of the invention can, of course, be carried out without departing from the scope thereof Accordingly, to promote the progress in science and the useful arts, the invention is disclosed and is intended to be limited only by the scope of the appended claims TABLE I 1234 XA 0 110 XB 0011 X+ direction XA 1 1 00 XB 0 1 10 X- direction XA00 1 1 XB 1 00 1 Xmax 1 1 Xmin 0 0 Flag Xman Xnun X+ Register Xreg, X+reg, X-reg, Xmax reg, Xmin reg TABLE II VX represents the operating speed of the finger controllable member, and also provides a predetermined value as a reference value for speed determination 28 V(n) represents the different moving speed of the finger controllable member and the setting of speed level reference value C1 represents the maximum displacement of the finger controllable member at minimum speed level C2 represents the maximum displacement of the finger controllable member at second speed level C3 represents the combined displacement of the finger controllable member, C1+C2 = C3 K(n) represents various reference constants at different speed level and the mutual relationship of various speeds of the finger controllable member V(n)X(n) represents the displacement of the finger controllable member at different speed level V1X1+reg is a register for registering the displacement of the finger controllable member in positive direction at lowest speed level V2X2+reg is a register for registering the displacement of the finger controllable member in positive direction at the second speed level V1X1-reg is a register for registering the displacement of the finger controllable member in negative direction at lowest speed level V2X2-reg is a register for registering the displacement of the finger controllable member in negative direction at the second speed level The formulas used in the control program flow chart are defined in TABLE III as follows TABLE III Formula 1 C1+C2 = C3 formula 2 Kn-(n-l)K2-(n-2)Kl n>=3,K2>Kl formula 3 (Klcursor1)+((K2cursor2)= the displacement of the display formula4 KnVnXn=K2V2X2+KlVlXl formula 5 VnXn=V2X2+VlXl 30 We Claim 1 A device for controlling a cursor to rotate rightwards and leftwards comprising an upper case (10), including an upper case cover (11) and an upper case base board (12), wherein the upper case cover having input keys (111) for pressing respective contacting switches (121), and wherein the upper case cover (11) includes locking lugs (112) that engage with said upper case base board, a central body (20) including a cover (21) and a base (22), wherein the base (22) has a circular disk bottom and an engaging means for engaging with the cover (21) of the central body (20), between the cover (21) and the base (22) being installed a X-axis sliding bar (23) and a Y-axis sliding bar serving respectively as a X-axis movable optic grid and a Y-axis movable optic grid, a transparent and an opaque X-axis photo grid zone (231) and two axis sliding blocks (232) being included on the X-axis movable optic grid, a transparent and an opaque Y-axis photo grid zone (241) and two axis sliding blocks (242) being included on the Y-axis movable optic grid, two light emitting diodes (2211 and 2221) are provided on the cover of the central body, wherein the cover further includes an X-axis photo transistor (221) and a Y-axis photo transistor (222) on each of which a fixed optic grid is disposed, wherein a peripheral portion of the base includes a first pair of U-shaped slots (223) which allow the X-axis movable optic grid (23) to slide therethrough and a second pair of U-shaped slots (224) which allow the Y-axis movable optic grid to slide therethrough, and wherein a plurality of snap hooks (225) are provided below said base, and a lower case (30) including a lower case cover (31), a lower case base board (32) and a control circuit board (33) located between the lower case cover and the lower case base board, wherein the lower case cover, the lower case base board and the control circuit board include central round hole (311, 321 and 331 respectively) defined therein 2 The device for controlling a cursor to rotate rightwards and leftwards as claimed in claim 1, wherein the sliding blocks on the two ends of the X-axis sliding bar and Y axis sliding bar are chambered shaped so to reduce the friction force during movement 31 3 The device for controlling a cursor to rotate rightwards and leftwards as claimed in claim 1, wherein said X-axis sliding bar and said Y-axis sliding bar could be positioned into said slots vertically without colliding or friction 4 The device for controlling a cursor to rotate rightwards and leftwards as claimed in claim 1, wherein in said central hole of said lower cover, the circumference in the upper half thereof is larger than that in the lower half thereof 5 The device for controlling a cursor to rotate rightwards and leftwards as claimed in claim 1, wherein a convex round body is installed below said circular base of said central body so to reduce the friction force during the rotation of said circular base 6 The device for controlling a cursor to rotate rightwards and leftwards as claimed in claim 1, wherein the circular base of said central body is disposed in the circular opening of said lower cover, the top surface of the base is aligned equal to or lower than the top surface of the lower case cover 7 The device for controlling a cursor to rotate rightwards and leftwards as claimed in claim 1, wherein the plurality of hooks provided below the circular base of said central body extend through the central round hole of the lower case cover and slide into slots defined in the lower case base board such that the base of the central body connects with the lower case cover 8 The device for controlling a cursor to rotate rightwards and leftwards as claimed in claim 1, wherein a plurality of pillars are optionally installed below said circular base of said central body 9 The device for controlling a cursor to rotate rightwards and leftwards as claimed in claim 1, wherein the pillars provided below said circular base of said central body may also be slid within the slots of said lower case base board 10 The device for controlling a cursor to rotate rightwards and leftwards as claimed in claim 1, wherein the lower case base board is provided with a plurality of slots for controlling the rotary angle of the circular base of said cental body 11 The device for controlling a cursor to rotate rightwards and leftwards as claimed in claim 1, wherein alternatively, the lower case base board includes a plurality of pillars, and the circular base of the central body includes a plurality of slots, and 32 wherein the pillars of the lower case base board extend into the slots of the circular base of the central body 12 The device for controlling a cursor to rotate rightwards and leftwards as claimed in claim 1, wherein the control circuit board includes an X-axis movable optic grid which has a transparent zone and an opaque photo gild zone located therein, and a hollow shaft concentrically disposed thereon, wherein the hollow shaft includes a rope wound around thereof for rotating the X-axis movable optic grid, the hollow shaft being engaged with a shaft and a bearing located on the control circuit board, and the rope being enclosed by a protecting tube, a Y-axis movable optic grid which has a transparent zone and an opaque photo grid zone located therein, and a hollow shaft concentrically disposed thereon, wherein the hollow shaft includes a rope wound around thereof for rotating the Y-axis movable optic grid, the hollow shaft being engaged with a shaft and a bearing located on the control circuit board, and the rope being enclosed by a protecting tube, an X-axis photo electric means including a light emitting diode located thereabove and a photo transistor located therebetween, the photo transistor having a fixed photo grid disposed thereon, and wherein the photo electric means further includes a central slot defined therein through which the X-axis movable optic grid moves, a Y-axis photo electric means including a light emitting diode located thereabove and a photo transistor located therebetween, the photo transistor having a fixed photo grid disposed thereon, and wherein the photo electric means further includes a central slot defined therein through which the Y-axis movable optic grid moves, a spindle having a screw hole defined in a center thereof for securing the spindle with the base of the central body with a screw, the spindle engaging with a bearing and a bearing seat of the lower case base board, and electronic circuit components of integrated circuits 33 13 The device for controlling a cursor to rotate rightwards and leftwards as claimed m claim 12, wherein the central body is formed of a substantially square shape 14 The device for controlling a cursor to rotate rightwards and leftwards as claimed in claim 12, wherein the lower case base board includes a rotary element having a concave base at its center for locating the control circuit board 15 The device for controlling a cursor to rotate rightwards and leftwards as claimed in claim 12, wherein the lower case base board and the lower case cover are provided with tap holes on their four comers for screwing them together 16 The device for controlling a cursor to rotate rightwards and leftwards as claimed in claim 12, wherein a slot structure is provided above the base of the central body, wherein the slot structure includes a plurality of U shaped slots symmetrically located on the central body base, wherein an X axis sliding bar is received in a first pair of the U shaped slots and a Y axis sliding bar is received in a second pair of the U shaped slots, wherein a sliding block is provided on each end of the X axis sliding bar and on each end of the Y axis sliding bar, wherein a middle portion of each of the sliding bars between the respective sliding blocks defines a strip space for a rope to slide, wherein the X axis sliding bar is connected with the X axis movable optic grid by the rope associated with the X-axis movable optic grid, and wherein the Y axis sliding bar is connected with the Y axis movable optic grid by the rope associated with the Y-axis movable optic grid. 17 The device for controlling a cursor to rotate rightwards and leftwards as claimed in claim 12, wherein a design for driving the X axis sliding bar and the Y axis sliding bar by the ropes reduces a moving area of the X-axis movable optic grid and the Y-axis movable optic grid 18 The device for controlling a cursor to rotate rightwards and leftwards as claimed in claim 12, wherein a fixing point is provided on a middle portion of the rope for fixing on the hollow shaft of the X-axis movable optic grid, and wherein a fixing point is provided on a middle portion of the rope for fixing on the hollow shaft of the Y-axis movable optic grid 34 19 The device for controlling a cursor to rotate rightwards and leftwards as claimed in claim 12, wherein a convex point is provided on a periphery of the X-axis movable optic grid, and a stopping pillar is provided on the control circuit board for controlling a rotary angle of the X-axis movable optic grid, and wherein a convex point is provided on a periphery of the Y-axis movable optic grid, and a stopping pillar is provided on the control circuit board for controlling a rotary angle of the Y-axis movable optic grid 20 The device for controlling a cursor to rotate rightwards and leftwards as claimed in claim 12, wherein said central body may be substituted by a cylinder body 21 The device for controlling a cursor to rotate rightwards and leftwards such as herein described with reference to the accompanying drawings 19 Dated this 17th day of June, 1997 G Deepak Sriniwas Of K & S Partners Agent for the Applicant 35 The present invention is related to a device for controlling a cursor to rotate rightwards and leftwards and the method thereof, wherein a X axis sliding bar and a Y axis sliding bar are installed between the cover and base of said mouse, and said X axis sliding bar and said Y axis sliding bar are used as the X axis movable optic grid and the Y axis movable optic grid respectively, said X axis movable optic grid and said Y axis movable optic grid will rotate with said base within a proper angle When said cover of said mouse is moved or rotated, said X axis movable optic grid and said Y axis movable optic grid will move or rotate synchronously and match the installation of a light emitted diode, a photo transistor, fixing optic grids and a controlling circuit so that the cursor on the computer display may be controlled with a small active range.

Full Text

BACKGROUND OF THE INVENTION
1 Field of the Invention
The present invention is related to a device for controlling a cursor to rotate rightwards and leftwards and the method thereof, especially to a cursor controlling device for rotating a X axis movable optic grid and a Y axis movable optic grid to a proper angle, further, said cursor may be moved intendedly
2 Description of the prior Art
The cursor controlling technique in the conventional computer display comprises a keyboard, a mouse, a trace ball, a touch controlling display, a optical pen. etc However, it is generally inconvenient to control the movement and positioning of a cursor by using the conventional cursor controlling devices For example, it is ineffective to use a conventional keyboard to drive a cursor While if a conventional mouse is used to control the movement of the cursor, the mouse must be moved on the table and accordingly the arm is also moved, wherein the movement of twist will drive the moving of the front arm, subsequently, the rear arm is also moved. in consequently, the frequent movement of arm is not met the requirement of Ergonomios, therefore for a long period of usage the arm will has an ache easily
US patent No 4 9.15.728 disclosed a square opening 136a formed on a top plate 134a of the outer case 132a as shown in Fig 1. The square opening 136a servers as margin for the finger-grippable element. The photo encoder includes a series of mask sections and transparent sections interleavely. In case the photo encoder with phase A and phase B is required to generate 320 phase signals per inch ( not includes the central portion), the minimum distance with a mask section and a transparent section on the photo encoder will be 0.16mm( 25 1mm/160 -0 .16mm) In
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consideration of the 90 degrees phase difference between the phases A and B, the distance will be equal to 0 08mm The narrow displacement nears a maximum tolerant range during operation Further, when the hardware sends out a pulse signal, it must displace a travel length of 0 08mm It will require rather precise movement to generate 320 pixels signal within a distance ranges of 25 4mm It is therefore noted that the prior art patent requires precise parallel structure for configuring the square opening and photo encoder in manufacture and assembly Otherwise, each dot on the square opening in Y-axis direction will have an incorrect X-axis margin value, similarly, each dot on the square opening in X-axis direction will have an incorrect Y-axis margin value
To match the different resolution of the various display, for example 800*600 or 1280*1204, the following various methods are possible
1 increasing the size of the finger controllable member, or
2 decreasing the distance between each mask section and transparent
section on the photo encoder
The former method will tire the user due to the length of the finger controllable member is increased, especially the operating range is limited in left and right direction in movement. The second method above will has problem that it can not correctly generate a signal at each moving tune because that the distance is decreased causing a small effective displacement Moreover, it is possible to cause a problem that the pointing device generates two or three pulse signals at each moving time 1 he design of shorten the distance of photo encoder can reduce the operating ranges of user hand during moving the finger controllable member, and it is especially applicable in use of remote controller for a multi-media system with more convenience and comfort, if the moving range of the finger controllable member is smaller then 16mm, then the moving of the lingers will be confined dramatically
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STATEMENT OF THE INVENTION
Accordingly, the present invention provides a device for controlling a cursor to rotate rightwards and leftwards comprising
an upper case (10), including an upper case cover (11) and an upper case base board (12), wherein the upper case cover having input keys (111) for pressing respective contacting switches (121), and wherein the upper case cover (11) includes locking lugs (112) that engage with said upper case base board, a central body (20) including a cover (21) and a base (22), wherein the base (22) has a circular disk bottom and an engaging means for engaging with the cover (21) of the central body (20), between the cover (21) and the base (22) being installed a X-axis sliding bar (23) and a Y-axis sliding bar serving respectively as a X-axis movable optic grid and a Y-axis movable optic grid, a transparent and an opaque X-axis photo grid zone (231) and two axis sliding blocks (232) being included on the X-axis movable optic grid, a transparent and an opaque Y-axis photo grid zone (241) and two axis sliding blocks (242) being included on the Y-axis movable optic grid, two light emitting diodes (2211 and 2221) are provided on the cover of the central body, wherein the cover further includes an X-axis photo transistor (221) and a Y-axis photo transistor (222) on each of which a fixed optic grid is disposed, wherein a peripheral portion of the base includes a first pair of U-shaped slots (223) which allow the X-axis movable optic grid (23) to slide therethrough and a second pair of U-shaped slots (224) which allow the Y-axis movable optic grid to slide therethrough, and wherein a plurality of snap hooks (225) are provided below said base, and
a lower case (30) including a lower case cover (31), a lower case base board (32) and a control circuit board (33) located between the lower case cover and the lower case base board, wherein the lower case cover, the lower case base board and the control circuit board include central round hole (311, 321 and 331 respectively) defined therein
A

SUMMARY OF THE INVENTION
In order to overcome said defect in the conventional device, a absolute coordinate positioning device is disclosed The inventor of the present invention has disclosed some inventions, for example, Taiwan Patent Application Nos 84205828 and 84295829, title "Mechanical optic absolute coordinate cursor controlling device (1), (2)," and the PCT International Patent Nos PCTCN950042, and PCTCN950043, and afterward another inventions are disclosed, Taiwan Patent Application Nos 84217771, title " Cursor Positioning Device," and Taiwan Patent Application Nos 85208588, title " An Improvement Structure of a Cursor Positioning Device" The present invention is a further improvement about said inventions " Cursor Positioning Device,' and " An Improvement Structure of a Cursor Positioning Device"
The present invention is related to a device for controlling a cursor to rotate rightwards and leftwards and the method thereof, wherein a X axis sliding bar and a Y axis sliding bar are installed between the cover and base of said mouse, and said X axis sliding bar and said Y axis sliding bar are used as the X axis movable optic grid and the Y axis movable optic grid, respectively, said X axis movable optic grid and said Y axis movable optic grid will rotate with said base within a proper angle When said cover of said mouse is moved or rotated, said X axis movable optic grid and said Y axis movable optic grid will move or rotate synchronously and match the installation of a light emitted diode, a photo transistor, fixing optic grids and a controlling circuit so that the cursor on the computer display may be controlled with a small active range
BRIEF DESCRIPTION OF THE. DRAWINGS
The invention, as well as its many advantages, may be further understood by the following description and drawings in which
fig 1 is a schematic view of the computer input device of the prior
art,
Fig 2 is a exploded view of the components of the first embodiment
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of the present invention,
Fig 3 is a elevational perspective view of the base of the central body in the first embodiment of the present invention,
Fig 4 is a partial assembly perspective view of the first embodiment of the present invention,
Fig 5 is a partial assembly perspective view of the first embodiment of the present invention,
Fig 6 is the assembled perspective view of the first embodiment of the present invention,
Fig 7 is a exploded view of the components in the second embodiment of the present invention,
Fig 8 is a structural view wherein the central body of the second embodiment of the present invention is substituted by a cylinder,
Fig 9A,C are the schematic view of the embodiment of the present invention,
Fig 10A, B are the schematic view of the embodiment of the present invention,
Fig 11A-C arc the schematic view of the mouse in the prior art.
Fig 12A-F shows the photo structure and waveform for the two sots of photo transistor detection used in the positioning device of the present invention,
Fig 13A-D shows the photo structure for detection used in the positioning device of the present invention,
Fig 14 shows the application circuit of the photo transistor for detecting the two sets of photoelectric structure in Fig 12,
Fig 15A-E is the flow diagram for detecting the two sets of photo transistors,
Fig 16 is the flow diagram for the boundary interruption program,
Fig 17A is the flow diagram for the H1 subprogram of Fig 15D,
Fig 17B is the flow diagram for the H2 subprogram of Fig 15D,
Fig 18A-D is the driving program of the computer,

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
Figs 12A to I2F show the structure and signal waveform of the photo encoder and the photo detector in accordance with the pointing device of the present invention This embodiment uses two photo transistors to detect the light beam of a LED The photo encoder 4 has two printed pattern lines as shown in Fig 12A Both the printed attem line has a series of mask sections and transparent sections interleavely with uniform width, but with 90 degrees phase difference therebetween When the photo encoder 4 is moved relative to the photo detector 6 as shown in Fig 12C, the light generated by the LED 61 will be detected by the photo detector 63 via the photo encoder 4 and the calibrating photo encoder 62 Therefore, the photo detector 63 generates a series of binary pulse signals and transmits the signals to the control circuit board 18 Under performance of the control circuit as shown in Fig 14 and the control flows as shown in Figs 15A to 15C, the moving direction of the photo encoder may be detected according to the binary pulse signals
Another, it shows that one end of the X-axis photo encoder 4 has a transparent end section 4C1, and the other end thereof has a mask end section 4C2 The purpose of the transparent and mask end section is to serve as a left margin Xmin and a right margin Xmax of the X-axis photo encoder Similarly, the Y-axis photo encoder has a left margin and a right margin. It is to be understood from this arrangement that the margin are obtained directly from the photo encoder capable of providing digital form signal Obviously, the present invention is different from the prior art, and it is easier to design a control program for determination
Alternately, the photo encoder 4 in said Fig 12A may has an end section 4C3 combining a transparent line and a mask line as shown in Fig 12F, instead of the end section 4C1 and 4C2 shown in Fig 12A In performance, both the signals XA and XI3 will be changed its phase at the same time after reaching the margin of the photo encoder 4 and exceeding

a distance of 1/4 period On the contrary, the phase of signal XA or XB will be changed when it does not reach the margin of the photo encoder So, the control circuit of the present invention may detect whether the phase of the signals XA and XB is changed at the same time to determine whether the photo encoder reaches its margin or not
Table 1 is a state table which shows when a computer system connected with the cursor positioning device of the present invention receives the signals XA and XB, the computer can determine the moving direction X+ or X- of the positioning device according to the binary value of the signals XA and XB The computer may get a flag Xmax and a flag Xmin according to the signal X+ and X- respectively, and then store the status of the flags into a register
Refering to Fig 12B again, it shows a perspective view of the X-axis photo detector 6 suitable to use the photo encoder as shown in Fig I2A The photo detector is composed of a LED 61, a fixed calibrating photo encoder 62, and a photo transistor 63 The arrangement of the components of the photo detector and the movable photo encoder 4 is illustrated in Fig 12C As shown in the drawing, the photo encoder 4 is arranged between the fixed calibrating photo encoder 62 and the LED 61 Therefore, the light beam transmitted by the LED 61 may either reach to the photo transistor 63 via the movable photo encoder 4 or be obstructed by the photo encoder The fixed calibrating photo encoder 62 has a series of printed patterns including transparent sections and mask sections interleavely as shown in Fig 12D, and the width of the printed pattern is designed to correspond to that of the movable photo encoder 4. In a preferred embodiment of the present invention, the movable photo encoder 4 is very closed to the fixed calibrating photo encoder 62, so that the light beam generated by the LLD 61 reaches the photo transistor 63 through the movable photo encoder 4 without light diffusion Fig 12E shows a series of pulse signals XA and XB generated by the photo detector assembly

It is noted that the movable photo encoder 4 of the present invention is equipped with interleaved printed patterns and the movable photo encoder 4 is designed to close to the fixed photo encoder 62 in space when moving, capable of generating a series of ON and OFF signals Due to this special design, the pitch of the encoder is possible to reach 320 patterns per inch The prior art requires laser beam LEDs to get the effect of high density pitch, otherwise the conventional photo detector will has series light diffusion problem These prior art problems can be simply overcame by the present invention
Fig 14 is a detail control circuit diagram with four sets of photo detecting circuits, with reference to the photo detector shown in Fig 12 In this embodiment, the X-axis phase signals are detected by two photo detecting circuit 81 and 81a The first X-axis photo detecting circuit 81 includes a LED 6la lor generating a light beam which will be detected by the photo transistors 63a and 63b The second X-axis photo detecting circuit 81a includes a LED 61b for generating a light beam which will be detected by the photo transistors 63c and 63d The Y-axis phase signals are detected by two photo detecting circuit 82 and 82a The first Y-axis photo detecting circuit 82 includes a LED 71a for generating a light beam which will be detected by the photo transistors 73a and 73b I he second Y-axis photo detecting circuit 82a includes a LED 71b for generating a light beam which will be detected by the photo transistors 73c and 73d The detected X-axis and Y-axis phase signals are supplied to a processing circuit 83 for further processes A switch circuit 84 are electrically connected to the processing circuit 83, which includes a left switch 1 la, a right switch 12b, and a middle switch 13c. The control circuit is provided with a voltage regulating circuit 85 for supplying a stable power source An output circuit 86 is used to amplify the output signal supplied from the processing circuit 83 and then supply the amplified output signal to a host computer (not shown) via transmission lines

Referring to Fig 15A, the computer first set the transmission rate, start bit, end bit, and data length of the communication port RS232 in step F2, followed by performing system initialization step F1 ln step F3, all flag status, registers, and associated value for determination of operating speed are cleared Thereafter, the computer reads the digital value of the phase signals XA, XB, YA, and YB, and finds out corresponding value of the X+, X-, Xmax, and Xmin from the state table of TABLE I as listed previously( only show the state of X-axis), and then stores the values for further comparison The computer will reads the values XA, XB, YA, and YB again in step F5, and then compares these values with the first read values, to determine whether the status is changed or not If the status is not changed, it indicates the finger controllable member of the cursor positioning device has no movement, and the procedure will return to read the XA, XB, YA, and YB again. On the contrary, if the status is changed, a X-mode determination procedure outlined by dot line as shown in Fig 15A, is performed There are four possible status i e (0,0), (1,0), (1,1), and (0,1) to be compared with the previous status. The computer may get the information about the moving speed of the cursor positioning device by calculating the time of changing of the various status Typically, the system clock of the computer is ranged from 4 to 8 MHz nowadays In practice, it is found that the normal operating speed that the user moves the finger controllable member of the cursor positioning device is below 5KHz Therefore, the computer may easily detect the operating speed of the cursor positioning device
The computer may determine the position of the cursor with reference to TABLE I above and the pulse signal listed in Fig 12E At first, the computer supposes the previous status is (0,0) in step F9. In case that XA=1 and XB=0, it indicates the finger controllable member is moved to direction X+, while in case that XA-0 and XB=1, it indicates the finger controllable member is moved to direction X- In case that XA=1 and XB=1, it indicates the finger controllable member either Y?aches a
10

minimum limit or maximum limit dependent on whether the flag X+flag is set or not After these determinations, various flag status X+, Xmin, Xman, etc are obtained, and then these flag status are accumulated in predetermined registers for further judgment for the control program So, in practical operation, the user just simply moves the finger controllable member to the left upper corner of the device to perform zero position initialization, and then the device can generate correct X-axis and Y-axis absolute coordinate values
Fig 15D is a subprogram flow chart of the control program, explaining how the cursor is moved to positive direction, while Fig 15E is a subprogram flow chart of the control program, explaining how the cursor is moved to the other direction The displacement of the cursor moving on the computer display is proportional to the moving distance of the finger controllable member The factor of the proportion depends on the moving speed of the finger controllable member The purposes of these procedures are as follows
1 To limit the displacement of the finger controllable member to a range
about 16mm or less Inspitefully, the movement of the cursor reptesenting
on the computer display is not effected by the shorten displacement, and
the different moving speed of the finger controllable member So, the
present invention is
impossible has problems of the prior art that the finger controllable member already reaches a margin of the positioning device but the cursor not reaches a corresponding margin on the computer screen not the finger controllable member not yet reaches a margin of the positioning device but the cursor already reaches a margin on the computer screen
2 When the cursor on the display moves to any desired position thereon, there are necessary fine displacements around the position
3 The moving speed and located position of the cursor on the display can always match that of the finger controllable member, resulting of a smooth, fast, and precise movement in operation
11

4 The finger controllable member in each axis, for example X- axis, has two registers for positive directional performance and two registers for negative directional performance The respective value recorded in the positive and negative registers is mutual associated, so that the finger controllable member may return to its original point and the cursor on the display may also return to its original point The various symbols used in the control program flow chart are defined in TABLE11
The VX represents the moving speed of the finger controllable member, changing among at least two different moving speeds, such as V1, V2, V3, and so on Different proportional factor K are appointed to correspond to the different moving speeds That is, the factor K is a constant representing that the displacement of the cursor moving on the display is proportional to the detected displacement of the finger controllable member on
the effective area of the positioning device for example, factors K1 and K2 may be various combinations, such as (1,2), (1,3), (1,4), (2,4), and so on, wherein the value of Kl and K2 may be a default value as a parameter for device driver program, which is selected by the user. It is therefore possible to determine the displacements C1 and C2 with reference to formula 1 and formula listed above, at both the first speed level and the second speed level In a preferred embodiment, C1 and C2 may be a default parameter according to the resolution of the computer display used When the resolution of the display is increased, the scale of the constant value K2 may be increased correspondingly, so that the cursor can be moved in a fine displacement operating mode which can match the minimum pixel displacement requirements of various display resolutions In such case, due to K2 is increased in accordance with the increment of the display resolution, the minimum pixel displacement is correspondingly decreased As result, the movement of the cursor on the display is very smooth Example
12

Supposing that the display resolution at X-axis of the display is 640, the
displacement of the photo encoder is about 15 68 (i e 196*0 08mm),
640 =(l+Cl)+(4cursor2), K1 = l, K2=4
196=C1+C2
C2=148, C1=48
In case that the display resolution at X-axis of the display is
1024,
1024 =(I+Cl)+(7cursor2), Kl=l, K2=7
196=C1+C2
C2=138, C1=58
When the display resolution is increased from 640 to 1024, the distance from pixel to pixel is decreased So, in spite of K2 being changed from 4 to 7 it will not effect the smooth performance of the cursor moving on the display In fine operation mode, the cursor can be moved at precise displacement from pixel to pixel on the display, no matter the change of the display resolution To reduce the distance between the optic grids C3, instade of reducing the the illumination and the distance for each lattice, the lattice number is reduced (in the prior art, it is reduced from 320 to 200), thus it is umpossible that the finger controllable member is only moved one lattice, but the display cursor is moved two or three lattice Therefore, if is appreciated from the description hereinablve, if the finger controlling controlling element want to move within a range samaller than 16mm from pixel to pixel, the present equation must be used, and by changing the value of recorder and the constant K. a cursor controlling device which is moved on an area of 10mm X 8mm may be derived another, said device may be used to control any point from the cursor to the display. In the a small movement cursor controlling device, C1 = 15, C2=27,and C3=113 (1X15-5X27- 10x113- 1280). In such a design, the distance between the optic grids of x axis = (15+27+113) X0 08mm -12mm, the distance between the optic grids of Y axis = 1024/1280 X
13

12mm=10mm, thus the length of said finger controllable member may be reduced to 25mm, or further to 20mm to suit the operation of thumb Fig 15D is a subprogram flow chart of the control program, explaining how the cursor is moved to a positive direction, while Fig 15E is a subprogram flow chart of the control program explaining how the cursor is moved to the other direction, represented as H1 and H2 respectively in Fig 15A When the finger controllable member is moved in positive direction, the value stored in positive directional registers VIXl+reg and V2X2+reg will be increased Correspondingly, the value stored in negative directional registers V1X1-reg and V2X2-reg will be decreased in accordance with the increment of the positive directional registers When X-axis coordinate is minimum, the value stored in register V1X1+reg is 0, V1X1-reg is equal to value of C1, V2X2+reg is 0, and V2X2-reg is equal to value of C2, when X-axis coordinate is maximum, the value stored in register VIXl+reg is equal to value of C1, V1X1-reg is 0, V2X2+reg is equal to value of C2, and V2X2-reg is 0. The moved displacement of the finger controllable member at the third speed level is transferred to temporary values V1X1+ and V2X2+ by using formulas 4 and 5 listed in TABLE III Thereafter, the temporary values are stored in registers V1X1-reg and V2X2+reg respectively, and then the value of reference constant K.3 may be calculated by using formula 2 listed in TABLE III After these procedures, the finger controllable member may correctly return to original position, and the cursor on the display may also correctly return to original position
For example K1 = 1, K2=4 K3=(n-l)K2-(n-2)K1 =(3-l)4-(3-2)1
= 7

The result indicates that in case the displacement of the finger controllable member is equal 1, the movement of the cursor on display will be equal to 7 Then, the displacement of the finger controllable member at the third speed level may be transferred and stored in registers VIXl+reg and V2X2+reg by using formulas 4 and 5 listed in TABLE III
K3*V3X3+ =K2*V2X2++K1*V1X1 V3X3+ -V2X2++V1X1 + 7*1 =4*V2X2++V1X1 +
1=V2X2++VIX1 +
V2X2+=+2,VlXl+=-l It is noted, in this case, the increment of V2X2+reg is 2, and the decrement of VIXl+reg is 1
The result indicates that the value stored in registers V2X2+reg and VIXl+reg at positive direction (I e , V2X2+reg +V1X1+reg =2+(-l) - 1) is match the real displacement of the finger controllable member at the third speed level
Further, formula 3 (K1cursor1) + (K2cursor2) = the displacement of the display K1XV1X1+ieg + K2VV2X2+reg = the displacement of the display thatis,(l*-l) + (4*2)=7
It indicates the same result that the displacement of the cursor on display is equal to 7 when the finger controllable member is moved at the third speed level The displacement of the finger controllable member at the third speed level is transferred into temporary values V2X2+ and V1X1 + by formulas 4 and 5 listed in TABLE III, and then the temporary values are stored in registers V2X2+reg and V1X1+reg respectively
It is obviously that the moving speed and positioning of the cursor on display may match that of the finger controllable member in accordance with the present invention, with advantage of smooth, fast, stable, and
15

precise moving performance The cursor positioning device of the present invention is provided with two positive directional registers and two negative directional registers. The value stored in the positive directional registers and the negative directional registers is always mutual associated, so that the finger controllable member may correctly return to original position and also the cursor may correctly return to original position correspondingly
It is noted that since the finger controllable members of the positive directional registers and the negative directional registers on X axis are mutual association The definition of the positive directional registers and the negative directional registers in X axis is only for the purpose of better understanding Alternatively, it is also possible to use two positive registers to achieve the same performance
After the main program finishes the determination procedure in direction X+ as described above, the procedure determines whether VX is less than or equal to a predetermined reference speed in step F41 of Fig 15D If yes, it indicates the speed of the finger controllable member is less than a lower limit speed V1, ie the first speed level In step F42, it further determines whether the value stored in register V1X1-rsg of the first speed level is larger than or equal to a constant CI If no, the displacement of the cursor is set to be proportional to that of the finger controllable member times a constant K1, and then in step F43 increasing the value of V1X1+reg, decreasing the value of V1X1-reg, and transmitting the value to computer If the value stored in register VIXl+reg of the first speed level is larger than or equal to a constant CI, it indicates the VIXl+reg reaches a maximum value In such a case, the displacement of the cursor will be set to be proportional to that of the finger controllable member times a constant K2, and then in step F46 increasing the value of V2X2+reg , decreasing the value of V2X2-reg, and transmitting the value to computer
16

If the result in step F41 is no, it indicates that the finger controllable member is at an upper limit of the reference speed V1. In step F44, it further judges whether VX is at an upper limit or at a lower limit of the reference speed V2 In case VX is at an lower limit of V2, a step F45 is performed to judge whether the value stored in the register V2X2+reg is maximum value or not If yes, the displacement of the cursor will be set to be proportional to that of the finger controllable member times a constant K1; if no, the displacement of the cursor will be set to be proportional to the displacement of the finger controllable member times a constant K2
In case that only three speed levels are presented in the cursor positioning device, the terminal symbols A and B are combined together In this case, if the result in step F44 is no, the step F47 is performed to read the left count remained in the positive register V2X2+reg. If the value of K2*V2X2-reg is less than that of K3, the displacement of the cursor will be set to be proportional to that of the finger controllable member times a constant K2, and then the procedure flows to step F46 to avoid a situation that the cursor value exceeds over the display margin when the performing speed of the cursor positioning device exceeds that of the reference speed V2. This also avoid a problem that the cursor does not return to original position. If the result in step F47 is no, the step F48 is performed to judge whether the register V2X2+reg is larger than or equal to a maximum value If yes, the displacement of the cursor will be set to be proportional to that of the finger controllable member times a constant K1, if no, it indicates that the register V2X2+reg remains left value and the displacement of the finger controllable member in positive direction at the third speed level can be transferred and stored in the register V1X1+reg and V2X2+reg Then, in step F49, the procedure judges whether the amount of fine displacement in positive direction exceeds a half of the distance If no, step F46 is performed to set the displacement of the cursor proportional to the displacement of the finger controllable member times a constant K2, if yes, the procedure flows to
17

step F50, decreasing the value of V1Xl+reg , increasing the value of V1X1-reg, adding the value of V2X2+reg by 2, decreasing the value of V1X1-reg, and subtracting the value of V2X2-reg by 2 Under this procedure, when the finger controllable member is operating at the third speed level, the register VIXl+reg remains a value that is half of the constant C1 As result, when the cursor is moved to any position on the display, there are fine displacements always around the position where the cursor presents
The speed parameter VX of the finger controllable member of Fig 15D is divided into three speed levels, le 0V2 Alternatively, the speed parameter VX may be divided into two speed levels, still remaining good performance described above and applicable to the most procedures of Fig 15D In this alternative embodiment, if the answer in step F41 is no, the step F47 is performed, neglecting steps F44 and F45 It means that the speed levels VI and V2 are set to be similar or the same value So, the second speed level will be neglected when the finger controllable member judges the value of VX It is also possible to detect the situation of the cursor positioning device such as key switch 13a shown in Figs 14, with amendment to the firmware In such a design, the user simply clicks the switch to enable the cursor positioning device operating at the first speed level If the user clicks the switch again, the cursor positioning device can operates at the third speed level In the third speed level, it is permitted to move the cursor on the display in fast moving operation mode Furthermore, the movement of the cursor on the display may be according to the velocity increment of the finger controlling element on a cursor area, namely, the velocity increment of said finger controlling element is used to substitute the velocity of said finger controlling element
Fig 15E is a subprogram flow chart of the control program,explaining how the cursor is moved to the other direction, the control flow of which
18

is similar to that of Fig 15D may correctly return to original position correspondingly
Fig 17A is a speed detecting procedure in positive direction, including various speed detecting subprograms The terminals A and B are connected to corresponding terminals A and B of Fig 15D In case that the result in step F44 is no, the procedure flows to step F61 of Fig 17A, if the result in step F61 is yes, the procedure flows to step F47 of Fig 15D. It is noted that the speed VX in positive direction uses the same control procedure at the third speed level, the forth speed level, and higher speed level In step F63, it detects whether the cursor is over the margin of the display If yes, the speed will be changed to a lower speed level to further judge whether the cursor is over the margin again The next step F64 is performed only until the cursor does not exceed the margin In step F64, it judges whether the register V2X2+reg is a maximum value If yes, the procedure returns to step F43, if no, the procedure flows to step 65 In step F65, it judges whether the register V1X1+-reg is larger than a half of the value C1. If no, the procedure flows to step 46, if yes, the procedure returns to step F66 At this time, the high speed value of the cursor poisoning device, for example at the third speed level or higher speed, is transferred into temporary values X2X2+ and V1X1+, and then storing the temporary values into the registers V2X2+reg and V1X1+reg respectively As result, the moving speed and positioning of the cursor on display may match that of the finger controllable member with advantage of smooth, fast, stable, and precise moving performance Fig 17B is a speed detecting procedure in negative direction, the control flow of which is similar to that of Fig 17A
The Y-axis procedure is followed by the X-axis procedure, with similar control flow described above
As shown in Fig 16, the process of said finger controlling element is terminated on the boundary, wherein the Xmax and Xmin generats ten

interrupting signals per second, and subsequently, the Y axle mode is judge and then the process is restored
Referring to FIGS 1 to 5, the embodiment one of this invention includes an upper case 10, a center body 20 and a lower case 30
The upper case 10 includes an upper case cover 11 and an upper case base board 12 The upper case cover 11 has three input keys 111 located in the left, center and right positions, and a pair of locking lugs 112 for engaging with a pair of locking slots 122 located in the upper case base board 12 The upper case base board 12 further has three contact switches 121 located under the three input keys 111
The center body 20 includes a cover 21 and a base 22 which has a circular disk bottom and has an engaging means for locking the cover 21 Between the cover 21 and the base 22, there are provided with a X-axis sliding bar 23 and a Y-axis sliding bar 24 which are served respectively as a X-axis movable optic grid and a X-axis movable optic grid. On the X-axis movable optic grid 23, there is provided with a transparent and opaque X-axis photo grid zone 231, and a X-axis sliding block 232 on each of the two ends Y-axis movable optic grid 24 also has a transparent and opaque Y-axis photo grid zone 241, and Y-axis sliding blocks 242 at both ends Inside the cover 21, there are two light emitting diodes 211, 212 In the base 22, there are a X-axis photo transistor 221 and a Y-axis photo transistor 222 each of which has respectively a stationary photo grid 2211 and 2221 disposed thereon In an upward peripheral flange an the base 22, trete are two pairs of U-shaped slots 223 and 224 allowing the X-axis movable optic grid 23 and Y-axis movable optic grid 24 to slide therethrough respectively. Under the base 22, there are snap hooks 225
The lower case 30 includes a lower case cover 31 and a lower case base board 32 with a control circuit board 33 located therebetween and screwed together. The lower case cover 31 and the circuit board 33 have a circular opening 311 and 331 formed in the center The circuit
20

board 33 has electronic components such as resistors, capacitors, inductors, transistors and integrated circuits (ICs) disposed thereon The four corners of the circuit board 33 are cut away to form "otches The lower case base board 32 has a plural number of curve-shaped concave slots 321 to form a substantially annular ring
When in use, the X-axis sliding bar 23 and the Y-axis sliding bar 24 can be slidably moved respectively through the slots 223 and 224 without interfering with each other as shown in FIG 1 A-A of the slots cross section The lower case cover 31 also has a circular opening 311 in the center The circular opening 311 has a smaller diameter at the lower portion than the upper portion
In the first embodiment of the present invention, the circular disk base 22 is disposed in the circular opening 311 and the top surface of the disk is equal to or lower than the top surface of the lower case cover 31. The disk base 22 further has a protrusive circular body 226 formed below the bottom surface for reducing the friction when the disk base 22 is rotating The snap hook 225 under the disk base 22 could engage with the opening 311 and thus preventing the base 22 from separating with the lower case cover 31 The bottom of the hooks 225 may be slidably moved in the concave slot 321 of the lower case base board 32
In the first embodiment of the present invention, under the disk base 22, there are a plural number of studs 227 which can be slidably moved in the concave slot 321 Thus the concave slot 321 of the lower case base board 32 may be used to control the rotation angle of the center body 20
As an alternative, the stud 227 may be disposed on the lower case base board 32 while the concave slot 321 may be formed under the bottom of the disk base 22 of the center body 20
FIG 7 shows embodiment two of this invention It includes a upper case 40, a center body 50 and a lower case 60
The upper case 40 includes an upper case cover 41 and an upper case base board 42. The upper case 41 has three input keys 411 aligning in
21

left, center and right, and a pair of locking lugs 412 engageable with a pair of locking slots 421 located in the upper case base board 42 The center body 50 include a cover 51 which is formed in substantially square shape and a base 52 which has concave slot means 53 an the top engageable with the cover 51, and a circular disk at the bottom The concave slot means 53 has four peripheral upward flanges each has an U shape slot 531,532 formed therein respectively and being symmetrically faced each other Between the cover 51 and the base 53 there is a X-axis sliding bar 54 slidably moveable through the slots 531, and a Y-axis sliding bar 55 slidably moveable through the slots 532 The X-axis sliding bar 54 and the Y-axis sliding 55 has respectively a pair of sliding blocks 541 and 551 at two ends there of, and has respectively a linear slot 542 and 552 formed in the top axially for housing a rope 56 therein The X-axis sliding bar 54 and Y-axis sliding bar 55 are linked respectively via the rope 56 to a X-axis movable optic grid 631 and a Y-axis movable optic grid 632 located in a control circuit board 63 The rope 56 is shielded in a protection tube 561
The lower case 60 includes a lower case cover 61 and a lower case base board 62 with the control circuit board 63 located therebetween The lower case corer 61 and the lower case base board 62 are screwed together. The lower case base board 62 has a bearing 622 housed in a bearing seat 621 located in the center of the bottom and has concave bottom space 623 for housing the control circuit board 63 The control circuit board 63 includes
(1) a X-axis movable optic grid 631 which has transparent and opaque photo grid zone 6311 located therein, and a hollow shaft 6312 concentrically disposed thereon '1 he hollow shaft 6312 has the rope 56 winds around thereof for rotating the X-axis movable optic grid 631. The hollow shaft 6312 is engaged with a shaft 6313 and a bearing 6314 located on the control circuit board 63 Said

rope 56 is enclosed by a protecting tube 561
(2) A Y-axis movable optic grid 652 has transparent and opaque
photo grid zone 6321 located therein, and a hollow shaft 6322
concentrically disposed thereon. The hollow shaft 6322 has the rope
56 winds around thereof for rotating the Y- axis movable optic grid
632 The hollow shaft 6322 is engaged with a shaft 6323 and a
bearing 6324 located on the control circuit board 63, said rope 56 is
enclosed by a proteting tube 561
(3)The X-axis photo electric means 633 has a light emitting diode
6331 located thereabove and a photo transistor 6332 located
thererbelon The photo transistor 6332 has a stationary photo grid
6333 disposed thereon The photo electric means 633 further has a
central slot formed therein for the X-axis movable optic grid 631 to
slide therethrough
(4) The Y-axis photo electric means 634 has a light emitting diode
6341 located thereabove and a photo transistor 6342 located
therebelow The photo transistor 6342 has a stationary photo grid
6343 disposed thereon 1 he photo eclectic means 634 further has a
central slot formed therein for the Y-axis movable optic grid 632 to
slide therethrough
(c)The spindle 635 has a screw hole 6351 in the center for screwing
the base 52 of the center body 50 thereon with a screw 6352 The
spindle 635 engages with the bearing 622 and bearing seat 621 of
the lower case base board 62
(c) Circuit componets shch as resistors, capacitors, inductors,
transistors, and integrated circuits
A positioning device of computer cursor may be assembled form said
structures (1), (2) and (3)
When in use, the X-axis sliding bar 54 and Y-axis sliding bar 54 can
be placed in the slot 53 of the concave slot means 53 without interfering
with each other The sliding blocks 541 and 551 of the X axis sliding bar
.2-3

54 and the Y axis sliding bar 55 has a cambered shape for reducing the friction force in movement As shown in the cross section A-A of Fig 2, the lower case cover 61 has a circular opening 611 in the center which has a smaller diameter in the lower portion than the upper portion The rope 56 is fixedly engaged with the hollow shafts 6312 and 6322 of the X-axis movable optic grid 631 and Y-axis movable optic grid 632
Figs 13A to 13D show a preferred photo encoder structure suitable to be used in the positioning device of the second embodiment Wherein, X axis movable optic grid 4 has a circular shape One end thereof is formed as a transparent section 4c 1, while the other end thereof is formed as a mask section 4c2, for the purpose of determining the left margin Xmin and the right margin Xmax In addition, the X axis movable optic grid 4 is composed of two circular patterns, the outer circular pattern is used to generate the signal XA and the inner circular pattern is used to generate the signal XB The margin signals in a digital form may be directly generated by detecting the movable photo encoder, so that the control program of the cursor positioning device is rather simple
Here are a plurality of nose points are installed on the nm portion of the movable optic grid of the second embodiment of the present invention, while a stopping cylinder is installed on the control circuit board for controlling the rotating angle of said movable optic grid
In the second embodiment of the present invention, a rope may be used to rotate the X-axis and Y-axis movable optic grids, and thus can reduce the size of the movable optic grids and the overall size of the cursor positioning apparatus
A cylinder 91 may be used to substitute the central body 50 of the second embodiment of the present invention, as shown in Fig 8 In such a design, not only the thickness of the overall structure is reduced, but also it may be installed on a notebook computer, thus the controlling of movement of cursor may be attained by controlling said cylinder
As shown in Figs 9A(a) and (b), the base of the mouse in the present

invention is fixed on an exactly normal position, i e the mouse of the present invention is normally positioned and is pressed by palm, then the cursor will be moved from a point a to a point b horizontally on a display according to the natural direction of human (horizontal rightwards), according to the direction of Ergonomics, now the mouse held by palm will the naturally moved rightwards In said figure, the X and Y axes of the palm are the directions of the X and Y axes in the hollow portion of said movable optic grid, in consequence, in the computer display shown in Fig 9A(c), the cursor is moved from the point a to the point b to show a horizontally rightward movement
As shown in Figs 9B(a) and (b), the base of the mouse in the present invention is fixed on an exactly normal position, besides, the mouse of the present invention is also inclined leftwards, then the mouse of the present invention is pressed by palm, and the cursor will be moved from the point a to the point b horizontally on a display according to the natural direction of human (horizontally rightwards), according to the direction of Ergonomics, now the mouse held by palm will naturally move upwards and leftwards In said figure, the X and Y axes of the palm are the directions of the X and Y axes in the hollow portion of said movable optic grid, in consequence, in the computer display shown in Fig 9B(c), the cursor is moved from the point a to the point b to show a horizontally rightward movement
As shown in Figs 9C(a) and (b), the base of the mouse in the present invention is fixed on an exactly normal position, besides, the mouse of the present invention is also inclined rightwards, then the mouse of the present invention is pressed by palm, and the cursor will be moved form the point a to the point b horizontally on a display according to the natural direction of human (horizontally rightwards), according to the direction of Ergonomics, now the mouse held by palm will naturally move upwards and downwards. In said figure, the X and Y axes of the palm are the directions of the X and Y axes in the hollow portion of said movable optic grid, in consequence, in the computer display shown in Fig 9C(c), the

cursor is moved from the point a to the point b to show a horizontally rightwards movement
As shown in Figs 10A(a) and (b), the base of the mouse in the present invention is positioned rightwards, the mouse of the present invention is pressed by palm, then the cursor will be moved form the protin a to the point b horizontally on a display according to the natural direction of human (horizontal rightwards), according to the direction of Ergonomics, now the mouse held by palm will the naturally moved rightwards. In said figure, the X and Y axes of the palm are the directions of the X and Y axes in the hollow portion of said movable optic grid, in consequence, in the computer display shown in Fig 10B(c), the cursor is moved from the point a to the point b to show a horizontally rightward movement
As shown in Figs 10B(a) and (b), the base of the mouse in the present invention is positioned leftwards, the mouse of the present invention is pressed by palm, then the cursor will be moved form the point a to the point b horizontally on a display according to the natural direction of human (horizontal rightwards), according to the direction of Ergonomics, now the mouse held by palm will the naturally moved rightwards In said figure, the X and Y axes of the palm are the directions of the X and Y axes in the hollow portion of said movable optic grid, in consequence, in the computer display shown in Fig 10C(c), the cursor is moved from the point a to the point b to show a horizontally rightward movement
From the aforementioned description, it is apparent that in the usage of the mouse of the present invention, the natural direction of human may match with the direction of palm in Ergonomics, thus the moving direction of the cursor on the display will coincide with the natural direction of human That is, the mouse base of the present invention may be positioned as pleasure without affecting the operation of said mouse, or if the mouse of the present invention is positioned so to incline with an angle, the mouse is still operated normally, thus the function of said mouse will not be affected
As shown in Figs 1 lA(a) and (b), the base of the mouse in the prior
26

art is fixed on a exactly normal position, and the mouse of the prior art is inclined leftwards and is pressed by palm, then the cursor will be moved form the point a to the point b horizontally on a display according to the natural direction of human (horizontal rightwards), according to the direction of Ergonomics, now the mouse held by palm will the naturally moved rightwards and upwards In said figure, the X and Y axes of the palm are the directions of the X and Y axes in the hollow portion of said movable optic grid, in consequence, m the computer display shown in Fig 11A(c), the cursor is moved from the point a to the point b to show a horizontally rightward and upward movement
As shown in Figs 1 lB(a) and (b), the base of the mouse in the prior art is fixed to be inclined leftwards and is pressed by palm, then the cursor will be moved form the point a to the point b horizontally on a display according to the natural direction of human (horizontal rightwards), according to the direction of Ergonomics, now the mouse held by palm will the naturally moved rightwards and upwards. In said figure, the X and Y axes of the palm are the directions of the X and Y axes in the hollow portion of said movable optic grid, in consequence, in the computer display shown in Fig 1 lC(c), the cursor is moved from the point a to the point b to show a horizontally rightward and downward movement ( that is the user intends that the cursor will be moved horizontally rightly and he (or she) also operates accordingly, but the cursor on the display is moved rightwards and upwards)
From the description hereinbefore, it is appreciated that in the usage of the mouse of the prior art, the natural direction of human will not match with the direction of palm in Ergonomics, thus the moving direction of the cursor on the display will not coincide with the natural direction of human
Many changes and modifications in the above described embodiment of the invention can, of course, be carried out without departing from the scope thereof Accordingly, to promote the progress in science and the useful arts, the invention is disclosed and is intended to be limited only by

the scope of the appended claims
TABLE I
1234 XA 0 110 XB 0011
X+ direction
XA 1 1 00
XB 0 1 10 X- direction
XA00 1 1
XB 1 00 1
Xmax 1
1
Xmin 0
0 Flag Xman Xnun X+ Register Xreg, X+reg, X-reg, Xmax reg, Xmin reg
TABLE II
VX represents the operating speed of the finger controllable member, and also provides a predetermined value as a reference value for speed determination
28

V(n) represents the different moving speed of the finger controllable
member and the setting of speed level reference value
C1 represents the maximum displacement of the finger controllable
member at minimum speed level
C2 represents the maximum displacement of the finger
controllable member at second speed level
C3 represents the combined displacement of the finger
controllable member, C1+C2 = C3
K(n) represents various reference constants at different speed level and
the mutual relationship of various speeds of the finger controllable
member
V(n)X(n) represents the displacement of the finger controllable
member at different speed level
V1X1+reg is a register for registering the displacement of the finger
controllable member in positive direction at lowest speed level
V2X2+reg is a register for registering the displacement of the finger
controllable member in positive direction at the second speed level
V1X1-reg is a register for registering the displacement of the finger
controllable member in negative direction at lowest speed level
V2X2-reg is a register for registering the displacement of the finger
controllable member in negative direction at the second speed level
The formulas used in the control program flow chart are defined in TABLE III as follows
TABLE III
Formula 1 C1+C2 = C3
formula 2 Kn-(n-l)K2-(n-2)Kl n>=3,K2>Kl
formula 3 (Klcursor1)+((K2cursor2)= the displacement of the display
formula4 Kn*VnXn=K2*V2X2+Kl*VlXl

formula 5 VnXn=V2X2+VlXl

30

We Claim
1 A device for controlling a cursor to rotate rightwards and leftwards comprising
an upper case (10), including an upper case cover (11) and an upper case base board (12), wherein the upper case cover having input keys (111) for pressing respective contacting switches (121), and wherein the upper case cover (11) includes locking lugs (112) that engage with said upper case base board,
a central body (20) including a cover (21) and a base (22), wherein the base (22) has a circular disk bottom and an engaging means for engaging with the cover (21) of the central body (20), between the cover (21) and the base (22) being installed a X-axis sliding bar (23) and a Y-axis sliding bar serving respectively as a X-axis movable optic grid and a Y-axis movable optic grid, a transparent and an opaque X-axis photo grid zone (231) and two axis sliding blocks (232) being included on the X-axis movable optic grid, a transparent and an opaque Y-axis photo grid zone (241) and two axis sliding blocks (242) being included on the Y-axis movable optic grid, two light emitting diodes (2211 and 2221) are provided on the cover of the central body, wherein the cover further includes an X-axis photo transistor (221) and a Y-axis photo transistor (222) on each of which a fixed optic grid is disposed, wherein a peripheral portion of the base includes a first pair of U-shaped slots (223) which allow the X-axis movable optic grid (23) to slide therethrough and a second pair of U-shaped slots (224) which allow the Y-axis movable optic grid to slide therethrough, and wherein a plurality of snap hooks (225) are provided below said base, and
a lower case (30) including a lower case cover (31), a lower case base board (32) and a control circuit board (33) located between the lower case cover
and the lower case base board, wherein the lower case cover, the lower case base
board and the control circuit board include central round hole (311, 321 and 331
respectively) defined therein
2 The device for controlling a cursor to rotate rightwards and leftwards as claimed
in claim 1, wherein the sliding blocks on the two ends of the X-axis sliding bar
and Y axis sliding bar are chambered shaped so to reduce the friction force during
movement
31

3 The device for controlling a cursor to rotate rightwards and leftwards as claimed in claim 1, wherein said X-axis sliding bar and said Y-axis sliding bar could be positioned into said slots vertically without colliding or friction
4 The device for controlling a cursor to rotate rightwards and leftwards as claimed in claim 1, wherein in said central hole of said lower cover, the circumference in the upper half thereof is larger than that in the lower half thereof
5 The device for controlling a cursor to rotate rightwards and leftwards as claimed in claim 1, wherein a convex round body is installed below said circular base of said central body so to reduce the friction force during the rotation of said circular base
6 The device for controlling a cursor to rotate rightwards and leftwards as claimed in claim 1, wherein the circular base of said central body is disposed in the circular opening of said lower cover, the top surface of the base is aligned equal to or lower than the top surface of the lower case cover
7 The device for controlling a cursor to rotate rightwards and leftwards as claimed in claim 1, wherein the plurality of hooks provided below the circular base of said central body extend through the central round hole of the lower case cover and slide into slots defined in the lower case base board such that the base of the central body connects with the lower case cover
8 The device for controlling a cursor to rotate rightwards and leftwards as claimed in claim 1, wherein a plurality of pillars are optionally installed below said circular base of said central body
9 The device for controlling a cursor to rotate rightwards and leftwards as claimed in claim 1, wherein the pillars provided below said circular base of said central body may also be slid within the slots of said lower case base board

10 The device for controlling a cursor to rotate rightwards and leftwards as claimed in claim 1, wherein the lower case base board is provided with a plurality of slots for controlling the rotary angle of the circular base of said cental body
11 The device for controlling a cursor to rotate rightwards and leftwards as claimed in claim 1, wherein alternatively, the lower case base board includes a plurality of pillars, and the circular base of the central body includes a plurality of slots, and
32

wherein the pillars of the lower case base board extend into the slots of the circular base of the central body 12 The device for controlling a cursor to rotate rightwards and leftwards as claimed in claim 1, wherein the control circuit board includes
an X-axis movable optic grid which has a transparent zone and an opaque photo gild zone located therein, and a hollow shaft concentrically disposed thereon, wherein the hollow shaft includes a rope wound around thereof for rotating the X-axis movable optic grid, the hollow shaft being engaged with a shaft and a bearing located on the control circuit board, and the rope being enclosed by a protecting tube,
a Y-axis movable optic grid which has a transparent zone and an opaque photo grid zone located therein, and a hollow shaft concentrically disposed thereon, wherein the hollow shaft includes a rope wound around thereof for rotating the Y-axis movable optic grid, the hollow shaft being engaged with a shaft and a bearing located on the control circuit board, and the rope being enclosed by a protecting tube,
an X-axis photo electric means including a light emitting diode located thereabove and a photo transistor located therebetween, the photo transistor having a fixed photo grid disposed thereon, and wherein the photo electric means further includes a central slot defined therein through which the X-axis movable optic grid moves,
a Y-axis photo electric means including a light emitting diode located thereabove and a photo transistor located therebetween, the photo transistor having a fixed photo grid disposed thereon, and wherein the photo electric means further includes a central slot defined therein through which the Y-axis movable optic grid moves,
a spindle having a screw hole defined in a center thereof for securing the spindle with the base of the central body with a screw, the spindle engaging with a bearing and a bearing seat of the lower case base board, and
electronic circuit components of integrated circuits
33

13 The device for controlling a cursor to rotate rightwards and leftwards as claimed m claim 12, wherein the central body is formed of a substantially square shape
14 The device for controlling a cursor to rotate rightwards and leftwards as claimed in claim 12, wherein the lower case base board includes a rotary element having a concave base at its center for locating the control circuit board
15 The device for controlling a cursor to rotate rightwards and leftwards as claimed in claim 12, wherein the lower case base board and the lower case cover are provided with tap holes on their four comers for screwing them together
16 The device for controlling a cursor to rotate rightwards and leftwards as claimed in claim 12, wherein a slot structure is provided above the base of the central body, wherein the slot structure includes a plurality of U shaped slots symmetrically located on the central body base, wherein an X axis sliding bar is received in a first pair of the U shaped slots and a Y axis sliding bar is received in a second pair of the U shaped slots, wherein a sliding block is provided on each end of the X axis sliding bar and on each end of the Y axis sliding bar, wherein a middle portion of each of the sliding bars between the respective sliding blocks defines a strip space for a rope to slide, wherein the X axis sliding bar is connected with the X axis movable optic grid by the rope associated with the X-axis movable optic grid, and wherein the Y axis sliding bar is connected with the Y axis movable optic grid by the rope associated with the Y-axis movable optic grid.
17 The device for controlling a cursor to rotate rightwards and leftwards as claimed in claim 12, wherein a design for driving the X axis sliding bar and the Y axis sliding bar by the ropes reduces a moving area of the X-axis movable optic grid and the Y-axis movable optic grid
18 The device for controlling a cursor to rotate rightwards and leftwards as claimed
in claim 12, wherein a fixing point is provided on a middle portion of the rope for
fixing on the hollow shaft of the X-axis movable optic grid, and wherein a fixing
point is provided on a middle portion of the rope for fixing on the hollow shaft of
the Y-axis movable optic grid
34

19 The device for controlling a cursor to rotate rightwards and leftwards as claimed in claim 12, wherein a convex point is provided on a periphery of the X-axis movable optic grid, and a stopping pillar is provided on the control circuit board for controlling a rotary angle of the X-axis movable optic grid, and wherein a convex point is provided on a periphery of the Y-axis movable optic grid, and a stopping pillar is provided on the control circuit board for controlling a rotary angle of the Y-axis movable optic grid
20 The device for controlling a cursor to rotate rightwards and leftwards as claimed in claim 12, wherein said central body may be substituted by a cylinder body
21 The device for controlling a cursor to rotate rightwards and leftwards such as herein described with reference to the accompanying drawings
19

Dated this 17th day of June, 1997

G Deepak Sriniwas Of K & S Partners Agent for the Applicant

35
The present invention is related to a device for controlling a cursor to rotate rightwards and leftwards and the method thereof, wherein a X axis sliding bar and a Y axis sliding bar are installed between the cover and base of said mouse, and said X axis sliding bar and said Y axis sliding bar are used as the X axis movable optic grid and the Y axis movable optic grid respectively, said X axis movable optic grid and said Y axis movable optic grid will rotate with said base within a proper angle When said cover of said mouse is moved or rotated, said X axis movable optic grid and said Y axis movable optic grid will move or rotate synchronously and match the installation of a light emitted diode, a photo transistor, fixing optic grids and a controlling circuit so that the cursor on the computer display may be controlled with a small active range.

Documents:

01144-cal-1997-abstract.pdf

01144-cal-1997-claims.pdf

01144-cal-1997-correspondence.pdf

01144-cal-1997-description(complete).pdf

01144-cal-1997-drawings.pdf

01144-cal-1997-form-1.pdf

01144-cal-1997-form-13.pdf

01144-cal-1997-form-2.pdf

01144-cal-1997-form-26.pdf

01144-cal-1997-form-3.pdf

1144-cal-1997-granted-abstract.pdf

1144-cal-1997-granted-claims.pdf

1144-cal-1997-granted-correspondence.pdf

1144-cal-1997-granted-description (complete).pdf

1144-cal-1997-granted-drawings.pdf

1144-cal-1997-granted-form 1.pdf

1144-cal-1997-granted-form 13.pdf

1144-cal-1997-granted-form 2.pdf

1144-cal-1997-granted-form 26.pdf

1144-cal-1997-granted-form 3.pdf

1144-cal-1997-granted-gpa.pdf

1144-cal-1997-granted-letter patent.pdf

1144-cal-1997-granted-reply to examination report.pdf

1144-cal-1997-granted-specification.pdf

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Patent Number

195163

Indian Patent Application Number

1144/CAL/1997

PG Journal Number

30/2009

Publication Date

24-Jul-2009

Grant Date

02-Sep-2005

Date of Filing

17-Jun-1997

Name of Patentee

MEI YUN CHEN

Applicant Address

FL. 3, NO.2, LANE 42, HOU KANG ST., SHIH LIN DISTRICT, TAIPEI

Inventors:

#	Inventor's Name	Inventor's Address
1	MEI YUN CHEN	FL.3, NO.2, LANE 42, HOU KANG ST, SHIH LIN DISTRICT, TAIPEI
2	FU KUO YEH	FL.3, NO.2, LANE 42, HOU KANG ST, SHIH LIN DISTRICT, TAIPEI

PCT International Classification Number

G09G 5/08,G09G 5/00

PCT International Application Number

N/A

PCT International Filing date

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1			NA