Title of Invention

A DEVICE AND METHOD TO CONTROL HEADLIGHTS OF VEHICLES AS PER BEHAVIOR OF EYE VISION

Abstract

The Electronic device to control the Headlights of the Vehicles as per the behavior of the Human eye for accurate vision, working as sensing the light of the coming vehicle in the opposite side by placing the sensing unit and controlling the light of the vehicle in such a way taking accommodation of Human eye into account for consideration, when vehicles are approaching each other. The resultant beam will be mixing the lights of all the Bulbs/Filaments of the Main beam and Lower beam, to be controlled distance-wise, will be returned to main beam after vehicles passing each other, as per required for accurate vision to avoid blinding, pain in eyes due to excessive lights, mental fatigue & accidents due to blinding during night time. Same type of the device is to be placed in each vehicle for better results.

Full Text

This invention relates to a device and method to control Headlights of vehicles as per behavior of Eye vision, for accurate vision to avoid depriving of sight, pain in the eyes & mental fatigue due to excessive lights and accidents during nighttime. The background of the invention: In known art, the upper part of the Headlights are painted black 1O control the incoming light beam from the vehicle coming from the opposite side, but the height of each vehicle and height-wise placing of the Headlights is not equal, therefore this method is not so effective And another method is dipper, it is driver's choice, every one is not using this and also it gives flicker/disturbance to the working mode/continuity of the vision of Human eye, when it is changing from main beam to dipper beam and vice versa The circuit diagram in this invention is very much different from any prior art/patent circuits. All the prior art patents are based on automatically dimming/dipper used, for light of the incoming vehicle increases to certain be specific value, but not taking the human eye concept in to consideration. Patent No.: EPO 541491 is also the dimming system used to dim the light from main beam to lower beam when light of the incoming vehicle increases certain be specific value. The list of Abstracts of the various prior patents is attached, in which only automatic dipper control is there. The automatically changing from main beam to lower beam also gives flicker/disturbance to the working mode/continuity of the vision of Human eye, when it is changing from main beam to dipper beam and vice versa So these methods are just hit and trail solutions to this problem. But in present invention the light of all the bulbs is to be controlled in such a manner taking accommodation of human eye into consideration. The summary of the invention: The Human eye is working in different five modes/region as it perceives the illumination as per perceptual capability of human eye The different region of the vision of Human eye, is taking Rel log illumination Vs Perceived Brightness. Rel. Log illumination from-2 to -6 lies in Scotopic region, 2 to 2 lies in Mesopic region, 2 to 7 lies in photopic region in which Iris of human eye operates and perceived brightness is to be 30% to 80 % depends upon accommodation of Human eye, 7 to 8 lies in hyperopic region, greater than 8 lies in Pain region. If we are taking the brightness/illumination of the beam of vehicle in to consideration, during night times, on the roads, the vehicles comes from opposite sides, may using dipper or not, light increases as vehicles comes close each other at fast relative velocity of the vehicles and light increases when bulbs approaching close to driver's eyes at sharp rate. The change in the light intensity/time-wise and change in the light intensity with change in the distance between eyes and headlights, are very high as the rate of the accommodation mode of human eye at that time and it cannot be accommodated by human eye as fast and as a result depriving of sight takes place. It is further stated that during night times, on the roads, the vehicles comes from opposite sides, may using dipper or not, light increases as vehicles comes close each other at fast relative velocity of the vehicles i.e. sum of the velocities of the vehicles and vehicles are taking few seconds to pass each other. As light from the bulbs of (main beam) incident on the road, a part of that is reflected and perceived by eyes as the information or wanted component of the light (SI) to produce the image of the road/vehicles/other things on the road, on the retina of Human eye. In this condition, eye is operating under the mode in which the Iris of eye operates. When other vehicles approaching from the opposite side, unwanted light (Ul) from that vehicle is get mixed with wanted component of light (SI) and resultant light increases as vehicles approaching each other at fast relative velocity of the vehicles. As a result unwanted light (Ul) overcomes the wanted component (SI), ratio SI/UI goes very low and Ul also goes to photoreceptor saturation level, due to this depriving of sight takes place. The Human eye cannot accommodate by Iris control as fast as light changes. Light goes to post photoreceptor saturation level, under these conditions the depriving of sight takes place. The change in the light also goes to hyperopic region and in the pain region due to these excessive lights, the mental fatigue and pain in the eyes occurs. Most of the accidents occur due to the depriving of sight in this transition period, when two vehicles passing each other or slightly after that, mostly any trespasser, cyclist or any other thing on the road, is not visible To avoid this, the lights from both the vehicles are to be controlled with distance-wise and kept whole control taking into consideration of the accommodation of the human eyes in to account to maximize the vision/clearance of the road to avoid the depriving of sight, pain in eyes, mental fatigue and accidents during night time. Control means for automatically adjusting the Headlights of the vehicles distance-wise as per behavior of Human Eye vision, for accurate vision to avoid depriving of sight, pain in the eyes & mental fatigue due to excessive lights and accidents during nighttime.In Towns and Cities, during night times where the streetlights are provided, full beam main beam is not required, so that new beam is developed for this type of situation for accurate vision. The object of the invention: The object of this invention is to devise a device for obviating the abo\e said defects and a device to control Headlights of Vehicles in affective way as per behavior of Eye vision, for accurate v lsion to avoid depriving of sight, pain in eyes & mental fatigue due to excessive lights and accidents due to depriving of sight during night time, comprising Sensing unit S means, sensing elements used to continuously sense the light distance-wise of the incoming vehicle in the opposite direction to the vehicle going in opposite to it Resistance network RI for ad|ustment of required resistance component in series with each sensing element,Resistance network R2 for adjustment of required resistance component for street lighted roads Two way Switch SW with two modes,Control unit C means, which will accept the \anation in the parameters of the said Sensing unit S and produces the switching signal applied to the Driver circuit DRC Driver circuit DRC means, which provides the isolation and driving signal to switching components of Power circuit P,Power circuit P means, the switching component switches as per receives control signal from Control unit C via Driver circuit DRC and Power from the Alternator & Batters, to control the voltage/current across the Bulbs (BL & BR) as per required for accurate vision,Connector means different connecting wires to connect different units It is also the object of this invention to have a device which is very simple in construction, easy for operation and available at affordable price Brief description of the drawings: 1 Fig No 1 Shows the block diagram of the device on which present invention based 2 Fig no 2 Show the circuit diagram of the device on which present invention based 3 Fig No 3 Show the fig placement of the device in the vehicle for the left side driving 4 Fig No 4 Show the fig placement of the device in the vehicle for the right side driving 5 Fig No 5 Shows vehicle with placing the device on the road and road layout for left side driving 6 Fig No 6 Shows vehicle with placing the device on the road and road layout for right side driving 7 Fig No 7 The flow diagram, which gives the detail of the sequence of the working of the device to control the lights of all the bulbs related to the present invention for left side driving 8. Fig No 8: The flow diagram, which gives the detail of the sequence of the working of the device to control the lights of all the bulbs related to the present invention for right side driving. 9. Fig No 9: The flow diagram, which gives the detail of the sequence of the working of the device to control the lights of all the bulbs related to the present invention for street lighted roads in Towns & Cities. The block diagram of the device: Thus according to this invention, as shown in Fig.No. 1, the device comprises of Sensing unit S, Control unit C, Resistance network Rl and R2, Two way switch SW, Driver circuit DRC, Power circuit P, Right side Headlight BR and Left side Headlight BL, Connector CON1 and CON1' to connect Sensing unit S with Rl, connector CON2 and CON2' to connect Rl with C, CON2" to connect R2 with C, CON3 and CON3' to connect C with DRC, CON4 and CON4' to connect DRC with P, CON5 to connect P with BR, CON6 to connect P with BL (for Left side driving), CON5 to connect P with BL,CON6 to connect BR(for Right side driving). Detailed description of the circuit diagram of the device related to the present invention: As shown in the Fig.No.2, the Sensing unit S consists of four Light dependent resistors 1,2,3& 4, which are sensing the light of the incoming vehicle in the opposite direction. One each end of 1,2,3,4 is being connected with each other and (+) supply applied by Switch SW13. Switch SW 13 is operating in two modes, either connect (+) supply to Rl or to R2.For Rl, all the Resistances (variable) 5,6,7,8 are connected in series with LDRs 1,2,3,4, and respective second ends of each resistances 5,6,7,8 are connected to corresponding Monostable multivibrators of Control unit C, for further adjustment of the lights of all bulbs, at required rate for accurate vision. For R2, one end of each resistances (variable) 9,10,11,12 are connected each other and second end of each resistance with monostable multivibrators of Control unit C for the further adjustment of the light at required rate for accurate vision, for the roads on which the street bulbs are provided in the Towns and in the Cities roads during night time. Two-way Switch SW 13 provides one state to connect (+) supply (A+) to sensing elements 1,2,3,4 and second state to connect (+) supply (C+) to R2 with resistances (variable) 9,10,11,12. CON1 and CON Tare provided to connect Sensing unit S with Rl, CON2 and C0N2' are provided to connect Rl with C, CON2" is provided to connect R2 with C. Control unit C consists of one master oscillator that is timing circuit to produce the rectangular wave astable mode of multi vibrator .The output of master oscillator MA 14 connected to the monostable multivibrators MSI (15), MS2 (16), MS3 (17), MS4 (18) and the variation in the resistances of LDR's connected with Rl or R2 are adjusted in such a way to adjust the output timing pulses of 15,16,17,18.Output of these monostable vibrators are supplied to opto couplers OC1 (19), OC2 (20), OC3 (21), OC4 (22). The output of the opto couplers supplied to the transistors 23,24,25,26 of DRC by CON3 and COW. The output of the DRC is connected to the gates of N-channel MOSFETS 27,28,29,30 of Power circuit P that control the voltage/current to the corresponding filaments of BR (B, b) and BL (B', b'). The output of 27 and 29 are connected by a CON 5 to Headlight BR (the bulbs /filaments B and b) and output of 28 & 30 connected by a CON 6 to headlight BL (the bulbs /filaments B' and b') for Left side driving. The outputs of 27 and 29 are connected by CON 6 to Headlight BR (the bulbs /filaments B and b) and output of 28 & 30 are connected by CON 5 to Headlight BL (the bulbs /filaments B' and b') for Right side driving. Working of the device: Same type of the device will be to put up in each Vehicle as shown in the Fig No.: 5 for the Left side driving and in the Fig No.: 6 for Right side driving. Vehicles are coming from the opposite sides, Sensing units in vehicles, placed above the forehead of the drivers and fixed on the body of vehicle, to sense the light beam of the coming vehicles opposite to each other, the Sensing units in Vehicles will give the variation in the parameter/resistance as per change in the light of the Vehicles coming in the opposite side and Control unit will control via driver circuit, the Power circuit, to control the Voltage/Current across the Bulbs, for Left side driving as per required as lights of the Bulbs of Main Beam, to be decreases slowly distance-wise at slightly different rates i.e. light of the Right side Bulb, is to be decreases slowly distance-wise and light of the Left side Bulb is to be decreases very slowly distance-wise to minimize the disturbance due to excessive lights that give deprive of sight the each of the drivers coming from the opposite sides, simultaneously lights of the Bulbs of Lower Beam, are to be starts from OFF to increases slowly distance-wise to maximize the vision as per required, the resultant controlled beam will be the mixing of the lights of all the Bulbs as controlled distance-wise as per vision of the eye vision as for Left side driving as per flow diagram shown in the Fig. No.: 7 for Left side driving and as per flow diagram shown in the Fig No.: 8 for Right side driving. Simultaneously the Device that is placed in the second vehicle coming in opposite direction will perform the same action After the vehicles are passing each other, the conti oiled beam will be returned to its Main Beam as shown in the Figure No 7 for Left side driving and in the Figure No 8 for Right side driving Again any Vehicle comes from opposite side, the Devices will starts working and the action to control the beams and the process will be continuous for each and every vehicle passing each other and for any number of the vehicles in the way Setting of Sensing unit and Control unil parameters are adjustable l e rate of the increase / decrease lights of the different Bulbs to produce the resultant beam, for different vehicles of different heights/dimensions for accurate vision As shown in the Fig, No 9, the lights of all the bulbs are controlled for street lighted roads in Towns & Cities For vehicles (Two Wheelers, Three Wheelers,) have one Headlight can be controlled with one channel of the device Thus this invention very simple and most effective for controlling the depriving of sight, pain in eyes due to excessive lights mental fatigue & accidents during nighttime The placement of the device in the vehicle:- As shown in the Fig No 3 Sensing unit S is to be placed above the forehead of the driver D, to be fixed on the body of the vehicle, Control unit C, DRC and Power circuit P is to be placed inside on the panel board of the vehicle The different connectors are provided to connect the different blocks of the device as shown in Fig No 3 for Left side driving and as shown in Fig No 4 for the Right side driving DETAILED DESCRIPTION OF THE PREFFERD EMBODIMENTS:- • Sensing unit may consists of sensing elements selected from group consisting of video cameras, image optical sensors, photo sensors and light dependent sensors, radio frequency and optical radars • Control unit may consists of the timing circuits and oscillator for generating signal, selected from solid state timing circuits, multivibrators, microprocessors, microcontroller and microcomputer • Driver circuit consists of Bipolar PNP or NPN transistors • Power circuit consists of Power switching components/ devices Low rd MOSFETs to control the Power • Headlights consist of Bulbs/Filaments/Tubes LED's incandescent lamps arcs lamps • Connectors with required wires/leads are connecting Sensing unit, Control unit, Power circuit, Driver Circuit, Resistance Networks, Head Lights, and Alternator & Battery with each other as lequired in the Device I CLAIM: 1 A device to control Headlights of Vehicles as per behavior of Eye vision, for accurate vision to avoid depriving of sight, pain in eyes & mental fatigue due to excessive lights and accidents due to depriving of sight during night time, comprising Sensing unit S means, sensing elements used to continuously sense the light distance-wise of the incoming vehicle in the opposite direction to the vehicle going in opposite to it, Resistance network Rl for adjustment of required resistance component in series with each sensing element, Resistance network R2 for adjustment of required resistance component for street lighted roads, Two way Switch SW 13 with two modes. Control unit C means, which will accept the variation in the parameters of the said Sensing unit S and produces the switching signal applied to the Driver circuit DRC, Driver circuit DRC means, which provides the isolation and driving signal to switching components of Power circuit P, Power circuit P means, the switching component switches as per receives control signal from Control unit C via Driver circuit DRC and Power from the Alternator & Battery, to control the voltage/current across the Bulbs (BL & BR) as per required for accurate vision, Connector means different connecting wires to connect different units 2 The Device, as claimed in claim 1, wherein said Sensing unit S comprising different four sensing elements (Light Dependent Resistors) 1,2,3,4 to sense the light intensity distance-wise of in coming Vehicle in the opposite direction 3 The Device, as claimed in claim 1,wherein said Resistance network Rl comprising of four variable lesistances 5,6,7,8 are connected in series with each sensing element for adjustment of the required switching signal of Control unit C for lequired rates of lights of four bulbs B, B', b, b' respectively 4 The Device, as claimed in claim 1,wherein said Resistance network R2 comprising of four variable resistances 9,10,11,12 for adjustment of the required rates of light of four bulbs B, B', b, b' respectively for street lighted roads 5. The Device, as claimed in claim 1,wherein said Control unit C comprising interconnectivity of Master oscillator (Astable Multi vibrator) MA14 and four (Mono Stable Multi vibrator) MSI (15), MS2 (16), MS3 (17) means for generating the timing signal, outputs of these monostable vibrators are supplied to opto couplers OC1 (19), OC2 (20), OC3 (21), OC4 (22) for isolation between Mono Stable Multi vibrators and Driver circuit DRC. 6. The Device, as claimed in claim 1,wherein said Driver circuit DRC comprising four bipolar transistors 23,24,25,26 receives signal from opto couplers, produces driving signal for Power circuit P. 7. The Device, as claimed in claim 1,wherein said Power circuit P comprising Power circuit P comprising Power electronic devices (n-channel MOSFETS) 27,28,29,30 used for switching purpose, produces required voltage/current for respective Bulbs. 8. A method to control Headlights of Vehicles as per behavior of Eye vision using in the device as claimed in claim 1 which comprises the steps as follows: (a) detecting the light intensity of beam of the coming vehicles opposite to each other, with light dependent parameter of sensing elements, (b) adjusting parameters of sensing element for the different vehicles for accurate vision by adjusting the variable resistances, (c) taking variation in resistances as parameter of sensing elements in monostable multivibrators attached to astable multi vibrator as timing signal generators, for generating the required timing pulses to the derive the power circuit via driver circuit as required by controlling voltage/current applied to all four bulbs to produce the required light. 9. A device to control Headlights of Vehicles as per behavior of Eye vision, substantially as herein described with reference to the accompanying drawings.

Documents:

829-del-2003-abstract.pdf

829-del-2003-claims.pdf

829-del-2003-complete specification (granted).pdf

829-del-2003-correspondence-others.pdf

829-del-2003-correspondence-po.pdf

829-del-2003-description (complete).pdf

829-del-2003-drawings.pdf

829-del-2003-form-1.pdf

829-del-2003-form-19.pdf

829-del-2003-form-2.pdf

829-del-2003-form-3.pdf

829-del-2003-form-5.pdf

829-del-2003-form-9.pdf