IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
|
| 국제특허분류(IPC7판) |
|
| 출원번호 |
US-0762001
(2010-04-16)
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| 등록번호 |
US-8772691
(2014-07-08)
|
|
발명자
/ 주소 |
- May, Donald F.
- Rains, Jr., Jack C.
|
| 출원인 / 주소 |
|
| 대리인 / 주소 |
|
| 인용정보 |
피인용 횟수 :
3 인용 특허 :
257 |
초록
▼
A system to provide radiant energy of selectable spectral characteristic (e.g. a selectable color combination) uses an integrating cavity to combine energy of different wavelengths from different sources. The cavity has a diffusely reflective interior surface and an aperture for allowing emission of
A system to provide radiant energy of selectable spectral characteristic (e.g. a selectable color combination) uses an integrating cavity to combine energy of different wavelengths from different sources. The cavity has a diffusely reflective interior surface and an aperture for allowing emission of combined radiant energy. Sources of radiant energy of different wavelengths, typically different-color LEDs, supply radiant energy into the interior of the integrating cavity. In the examples, the points of entry of the energy into the cavity typically are located so that they are not directly visible through the aperture. The cavity effectively integrates the energy of different wavelengths, so that the combined radiant energy emitted through the aperture includes the radiant energy of the various wavelengths. The apparatus also includes a control circuit coupled to the sources for establishing output intensity of radiant energy of each of the sources. Control of the intensity of emission of the sources sets the amount of each wavelength of energy in the combined output and thus determines a spectral characteristic of the radiant energy output through the aperture.
대표청구항
▼
1. A lighting device, comprising: at least one thermal conduction element;a plurality of solid state light emitters, wherein the plurality of solid state light emitters comprise multiple LED light sources for emitting multiple, different spectral characteristics of light;at least a first reflective
1. A lighting device, comprising: at least one thermal conduction element;a plurality of solid state light emitters, wherein the plurality of solid state light emitters comprise multiple LED light sources for emitting multiple, different spectral characteristics of light;at least a first reflective element, wherein the first reflective element is white, highly diffusely reflective and forms an optical integrating cavity for combining light from the LED light sources;at least one conical deflector having a specular reflective inner surface coupled to an output aperture of the optical integrating cavity;a control circuit for controlling the LED light sources to provide a predetermined characteristic in the combined light for output from the lighting device; anda sensor for sensing a parameter during operation of the lighting device, wherein the control by the control circuit is responsive to the parameter sensed by the sensor,wherein said solid state light emitters are mounted on at least a first portion of said thermal conduction element and said first reflective element is positioned such that at least a portion of light emitted from at least one of said solid state light emitters is reflected by said first reflective element, andwherein a second portion of said thermal conduction element is exposed to ambient air. 2. A lighting device as recited in claim 1, wherein the sensor comprises a temperature sensor. 3. A lighting device as recited in claim 1, wherein the sensor comprises a light intensity sensor. 4. A lighting device as recited in claim 1, wherein the sensor comprises a color sensor. 5. A lighting device, comprising: at least one thermal conduction element;a plurality of solid state light emitters, wherein the plurality of solid state light emitters comprise multiple LED light sources for emitting multiple, different spectral characteristics of light;at least first and second reflective elements, wherein the first reflective element is white, highly diffusely reflective and forms an optical integrating cavity for combining light from the LED light sources;at least one conical deflector having a specular reflective inner surface coupled to an output aperture of the optical integrating cavity;a control circuit for controlling the LED light sources to provide a predetermined characteristic in the combined light for output from the lighting device; anda sensor for sensing a parameter during operation of the lighting device, wherein the control by the control circuit is responsive to the parameter sensed by the sensor,wherein said solid state light emitters are mounted on at least a first portion of said thermal conduction element and said first reflective element is positioned such that at least a portion of light emitted from at least one of said solid state light emitters is reflected by said first reflective element, andsaid second reflective element is positioned on said thermal conduction element. 6. A lighting device as recited in claim 5, wherein the sensor comprises a temperature sensor. 7. A lighting device as recited in claim 5, wherein the sensor comprises a light intensity sensor. 8. A lighting device as recited in claim 5, wherein the sensor comprises a color sensor. 9. A lighting device, comprising: at least one thermal conduction element, said thermal conduction element having a first side and a second side, said first side of said thermal conduction element comprising at least a first surface, said thermal conduction element defining at least one conduction element opening;a plurality of solid state light emitters mounted on said first side of said thermal conduction element, wherein the plurality of solid state emitters comprise multiple LED light sources for emitting multiple, different spectral characteristics of light;at least one reflective element, said reflective element also being mounted on said first side of said thermal conduction element, wherein the first reflective element is white, highly diffusely reflective and forms an optical integrating cavity for combining light from the LED light sources;at least one conical deflector having specular reflective inner surface coupled to an output aperture of the optical integrating cavity;at least one shield member, said shield member extending from said first side of said thermal conduction element away from said second side of said thermal conduction element;a control circuit for controlling the LED light sources to provide a predetermined characteristic in the combined light for output from the lighting device; anda sensor for sensing a parameter during operation of the lighting device, wherein the control by the control circuit is responsive to the parameter sensed by the sensor. 10. A lighting device as recited in claim 9, wherein the sensor comprises a temperature sensor. 11. A lighting device as recited in claim 9, wherein the sensor comprises a light intensity sensor. 12. A lighting device as recited in claim 9, wherein the sensor comprises a color sensor. 13. A lighting device, comprising: at least one thermal conduction element said thermal conduction element having a first side and a second side, said first side of said thermal conduction element comprising at least a first surface, said thermal conduction element defining at least one conduction element opening;a plurality of solid state light emitters mounted on said first side of said thermal conduction element, wherein the plurality of solid state emitters comprise multiple LED light sources for emitting multiple, different spectral characteristics of light;at least one reflective element, said reflective element also being mounted on said first side of said thermal conduction element, wherein the first reflective element is white, highly diffusely reflective and forms an optical integrating cavity for combining light from the LED light sources, wherein the one conduction element opening forms a passageway through which the optically integrated light is emitted from the cavity;at least one shield member, said shield member extending from said first side of said thermal conduction element away from said second side of said thermal conduction element;a control circuit for controlling the LED light sources to provide a predetermined characteristic in the combined light for output from the lighting devices; anda sensor for sensing a parameter during operation of the lighting device, wherein the control by the control circuit is responsive to the parameter sensed by the sensor. 14. A lighting device as recited in claim 13, wherein the passageway formed by the one conduction element opening allows output of optically integrated light but precludes direct viewing of the LED light sources.
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