Title of Invention

A LED LIGHTING DEVICE OPERABLE UNDER TWIN POWER SOURCE

Abstract

This invention relates to a LED lighting device operable under twin power source for outputting controlled lumens, comprising; a housing (6) accommodating a protective cover (2) affixed to a frame (1) of the housing, the housing having a power input socket (7); a reflector (8) interposed between the protective cover (2) and interior surface of the housing (6), the reflector (8) being disposed centrally around a three-dimensional matrix (5) formed of at least one printed circuit board (PCB); an electronic circuitry means (3) attached to the housing (6) and including a micro-controller structure (IC1, IC2, IC3); the electronic circuitry means (3) being disposed in an enclosure separate from the housing (6); a plurality of LEDs (4) forming several sets of LED connected to the electronic circuitry means (3), the LEDs (4) provided with a frequency control device (11) and being disposed on the reflector (8). The electronic circuitry means (3) comprising a diode (10) through which the current input via the power input socket (7) passes and acting as a polarity protection; the frequency control device (11) enabling a resistor- capacitor network (12,13) to operate in a harmony to determine the mother frequency, and in that the microcontroller architecture acting as a fast-switching means enabling repetitive switching indistinguishable to the human eye and allowing a desired control of the amount of lumen output from a set of LED by varying the frequency.

Full Text

FIELD OF THE INVENTION The present invention relates to energy saving lighting devices. The invention in particular relates to an LED (Light Emitting Diode) based energy saving solar lighting device, which is also adaptable to conventional power source. More particularly, the invention relates to a twin power source adaptable LED lighting device outputting controlled lumens. It can be used in homes, schools, streets and for industrial use both in rural and urban societies. BACKGROUND OF THE INVENTION The existing lighting devices which are generally available in the market comprises incandescent lamp arrangements, fluorescent lighting arrangements and other high capacity sodium vapour, mercury vapour and metal halides. These are inefficient in energy consumption and in addition causes a cost burden to the consumer. For example, in a 100 watt incandescent lamp only about 15% of available electrical energy is converted to light energy and the rest 85% is converted into heat energy. Similarly, in the case of fluorescent lighting, about 60% of the electrical energy is converted into light energy and the rest 40% is needed to keep the required temperature of the gas of the lamp. Further, the prior art lighting devices also includes solid state lighting arrangement with directional emission LEDs. However, the LED-based lighting devices have found extensive use in traffic lighting system, eventhough they are limitedly being used in decorative lighting too. Nikhil Ramesh Taskar, et al disclosed a light emitting device containing an array of directional emission LEDs. The directional emission LEDs in the form of array may be substrate emitting, lateral current injection, resonant cavity LEDs mounted in a flip-chip configuration. Each LED may emit a different color light, such that the output of the array appears white to an observer. The LED array cluster may contain micro optical elements, such as a defraction grating or microprisms, integrated into the light emitting surface of the package. The microoptical elements are used to mix the light beams by individual LEDs in the array. Barbara Harrison et al describes an improved decorative lighting device which uses a plurality of optical fibres formed of flexible, transparent/translucent/opaque/ monofilament nylon. The device is configured to have a central column containing atleast one light-source, a rigid member lying in a plane substantially perpendicular to the axis of said column, wherein said plurality of optical fibres extending from a point adjacent the top of said column about said rigid member to a point adjacent the bottom of said column. Such decorative device is generally used as a decorative light and not suitable for house-hold or industrial use. Further, these are costly and eliminates the application of LEDs. Irving Schaffer et al discloses an LED signal module having individual LED reflectors as opposed to a common single reflector. The module includes a casing defining a cavity. Within the cavity is an array of LEDs Individual reflectors are placed around individual Leds of the array. The individual reflectors are structured to receive direct light from their associated individual LEDs and substantially to prevent direct light from their associated individual LEDs from impinging upon the individual reflectors of other LEDs of the array of LEDs. A lens covering the cavity is disposed which lens is shaped to direct the output luminance of the LEDs below the horizontal axis of the module. Guy Dessureault et al disclosed traffic light electronic controller which stabilizes the total output light intensity of the traffic light in order to ensure a constant light intensity of each traffic light color. The controller detects the output light intensity of a first color, and then automatically adjust the power input for the LEDs in order to increase the light intensity when needed. The controller operates in a closed loop cycle in order to perform real-time control of the light intensity output. Thus, at each moment of the traffic light lifetime, the output light intensity is constant and equivalent to a predetermined standard. The intensity is further controlled by detecting ambient light condition. Tooshiji Kishimura et al, discloses a white LED lighting device having a light source for white LED lighting that enables an energy-saving, maintenance-free operation while ensuring ample illuminance. The device comprising a lamp body having a mounting base, a lamp casing, a colorless transparent globe fixed to the lamp casing, a light source for emitting white LED lighting, and a light source controller, a lamp support for supporting said lamp body, a power source device for supplying electric power to said light source for emitting white LED lighting. The light source for emitting white LED lighting comprising a reflective plate having holes, a plurality of white LED elements within said holes, a base plate attached to the positive and negative terminals of the LED-elements, and a series parallel electrical network connected to said positive and negative terminals of the LED elements. The introduction of LED in the lighting arrangement for commercial use however entails many practical problems. First of all, the LEDs are very sensitive to certain input power and it is not possible to handle more than 10% of maximum forward voltage. Besides, a very precise input power source is necessary for the LEDs which controls both voltage and current, thereby drive LED Luminaire efficiently. Further, the LEDs available in the market do not emit wide beam, which is generally required in light design for practical use. The prior art LED luminaires in the market are either directly connected to the battery or sometimes through a prehistoric current limiting device like a resistor which possess its own power loss and moreover there is no control over the current input. Further, the prior art Led lighting devices generally use a conventional power source with a battery back-up. However, the LED lighting devices adaptable to twin energy source for example, conventional and solar energy fail to provide the advantage of consistently uniform lumens output. OBJECTS OF THE INVENTION It is therefore, an object of the present invention to propose a twin power-source adaptable LED lighting device which eliminates the disadvantages of prior art. Another object of the present invention is to propose a twin power-source adaptable LED lighting device which can be operated by both conventional energy and non-conventional energy. A still another object of the present invention is to propose a twin power-source adaptable LED lighting device which substantially reduces consumption of input energy and is economic to the customer because of very long life^of the LEEDS. Yet another object of the present invention is to propose a twin power-source adaptable LED lighting device which provides a wide range of power rating illumination outputs and can also be used for several consecutive days in cloudy weather when used in a solar system. A further object of the present invention is to propose a twin power-source adaptable LED lighting device which is compact and handy. A still further object of the present invention is to propose a twin power-source adaptable LED lighting device which can be adapted in homes, schools, streets and for industrial use both in rural and urban societies. A still another object of the present invention is to propose a twin power-source adaptable LED lighting device which is eco-friendly. An yet further object of the present invention is to propose a twin power-source adaptable LED lighting device which can effectively contribute in promoting social causes for example, education for children and adults in areas without electricity including more efficient household work and home based industry. SUMMARY OF THE INVENTION The concept of utilization of solar energy for human benefit has been under research for the last few decades. Simultaneously development work is being conducted on different types of electrical lighting appliances to run on this solar energy input. On considering the above, an improved solar lighting arrangement has been developed with a plurality of LED assembled in cluster to generate visible lumens for the human eye. The new technology has been developed where the LEDs are arranged in a combination with the help of a state-of-the-art frequency controlled device which performs harmonious switching. The repetitive switching takes place within a periocTof a Traction of a second and is not .distinguishable to the human eye. The amount of lumens output from one set of LED can be controlled as per desired requirement of end user by varying the frequency. The energy saving light device comprises an unbreakable housing having a clear or frosted front of acrylic/toughened/glass/polycarbonate affixed to the housing with a frame. Inside the housing there is reflecting means around a central three dimensional LED matrix made of PCB (Printed circuit Board) on which desired number of LEDs are fixed up. The LEDs are connected to an Electronic Circuitory means which is molded in resin and housed in a separate enclosure mounted outside the housing the luminaire for easy accessibility. This electronic circuitory means consists of PCB, an assembly of ICs, resistors, capacitors, variable resistor and a multi-pin jack. A micro-controller architecture configured as a fast switching means formed on the electronic circuitory means. The micro-controller detects output light intensity of a matrix and automatically adjust the total output intensity to provide a consistently desired output of the device. The LED lighting device is capable of producing in the range of 50-1000 lumens illumination. The LED lighting Device is capable of producing in the range of 1.5 to 20w. The LED lighting Device is capable of generating and applicable in the frequency range of 1.5 - 5 mega Harz. BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS Figure 1 - Shows a schematic diagram of the Luminor. Figure 2 - Shows a schematic diagram of the Electronic circuitory means. DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT OF THE PRESENT INVENTION As shown in Figure 1 the lighting device comprises a housing (6) made of unbreakable materials having a frame (1) to hold a clear or frosted front cover (2) of acrylic/toughened glass/polycarbonate. A multi-facated parabolic reflector (8) centrally disposed around a three dimensional operably matrix (5) to which a cluster of plurality LEDs (4) are connected through an electronic circuitory means (3) which is attached to the housing (6). The housing is also provided with a power input socket (7). As shown in Figure 2, the electronic circuitory means (3) comprises an input power point (7). The input current passes through a diode (10) which acts as a polarity protection. A frequency control (11) preset determines the charge rate of a capacitor (13) and a resistor (12), enabling the resistor-capacitor network (12, 13) to work in harmony to determine the mother frequency. To get train of pulses, a first chip (IC1) is very close to input (V.D.D.). Thus, a feed-in (14) is disposed between a pair of switching chips (IC2, IC3) to reduce the base saturation of a pair of switching chip (IC2 and IC3). Since the shape of the frequency thus generated has a base-line delay so the switching interval is fixed. This helps to protect the junction of LEDs even without a current limiting resistor. Output of the switching chips (IC2 and IC3) is sent to the LEDs (4). WE CLAIM: 1. A LED lighting device operable under twin power source for outputting controlled lumens, comprising: - a housing (6) accommodating a protective cover (2) affixed to a frame (1) of the housing, the housing having one or two power input sockets (7); - a reflector (8) interposed between the protective cover (2) and an interior surface of the housing (6), the re- flector (8) being disposed centrally around a three- dimensioned matrix (5) formed of at least one printed circuit board (PCB); - an electronic circuitry means (3) attached to the housing (6) and including a micro-controller structure (IC1 , IC2, IC3 ); the electronic circuitry means (3) being disposed in an enclosure separate from the housing (6); a plurality of LEDs (4) forming several sets of LED connected to the electronic circuitry means (3), the LEDs (4) provided with a frequency control device (11) and being disposed on the reflector (8), characterized in that the electronic circuitry means (3) comprising a diode (10) through which the current via the power input socket (7) passes and acts as a polarity protection; the frequency control device 11 enabling a resistor-capacitor network (12, 13) to operate in a harmony to determine the mother frequency, and in that the microcontroller architecture acting as a fast-switching means enabling repetitive switching indistinguishable to the human eye and allowing a desired control of the amount of lumen output from a set of LED by varying the frequency. 2. The device as claimed in claim 1, wherein the micro controller structure comprises a first chip (IC1) disposed proximal to the resistor - capacitor network (12, 13) to obtain a train of pulses, and a pair of switching chips (IC2, IC3 ) having a feed - in (14) interposed between each of the switching chips (IC2, IC3 ) which reduces the base saturation of the pair (IC2, IC3 ), and produces a fixed switching interval by generating a base-line delay. 3. The device as claimed in claim 1, wherein the frequency control device (11) determines the charge rate of the capacitor (13) and the resistor (12) of the resistor - capacitor network. 4. The device as claimed in claims 1 to 3, wherein the output of the pair (IC2, IC3) is transmitted to the LEDS (4). 5. The device as claimed in claim 1, wherein the protective cover (2) comprises one of acrylic, toughened glass and polycarbonate material. 6. The device as claimed in claim 1, wherein the reflector (8) is shaped as parabolic or multifaced. 7. A LED lighting device operable under twin power source for outputting controlled lumens as substantially described herein with reference to the accompanying drawings.

Documents:

00783-kol-2006.abstract.pdf

00783-kol-2006.claims.pdf

00783-kol-2006.correspondence others.pdf

00783-kol-2006.description(complete).pdf

00783-kol-2006.drawings.pdf

00783-kol-2006.form-1.pdf

00783-kol-2006.form-2.pdf

00783-kol-2006.form-26.pdf

00783-kol-2006.form-3.pdf

783-kol-2006-abstract.pdf

783-kol-2006-amanded claims.pdf

783-kol-2006-correspondence.pdf

783-kol-2006-description (complete).pdf

783-kol-2006-examination report.pdf

783-kol-2006-form 18.pdf

783-kol-2006-form 2.pdf

783-kol-2006-form 26.pdf

783-kol-2006-form 3.pdf

783-kol-2006-granted-abstract.pdf

783-kol-2006-granted-claims.pdf

783-kol-2006-granted-description (complete).pdf

783-kol-2006-granted-drawings.pdf

783-kol-2006-granted-form 1.pdf

783-kol-2006-granted-form 2.pdf

783-kol-2006-granted-specification.pdf

783-kol-2006-reply to examination report.pdf

abstract-00783-kol-2006.jpg