Integrating chamber cone light using LED sources
First Claim
1. A system comprising:
- A) a light fixture for a visible illuminating type lighting application, to illuminate or to provide task or object illumination, in a region or area intended to be occupied by a person, the light fixture comprising;
1) an optical integrating cavity having at least one diffusely reflective interior surface and an optical passage through a wall of the cavity for allowing emission of optically integrated light from the cavity; and
2) a plurality of sources of light coupled to directly supply light to the optical integrating cavity in one or more directions to cause substantial portions of light supplied by the sources to reflect from said at least one diffusely reflective surface of the optical integrating cavity one or more times to optically integrate the light from the sources before emission as the optically integrated light through the optical passage of the integrating cavity for the visible lighting application, at least two of the sources emitting light of respective different colors,wherein the sources provide sufficient light energy in the optically integrated light and the optical integrating cavity is configured to direct the optically integrated light emitted through the optical passage in a direction to facilitate said visible illuminating type lighting application; and
B) a control circuit coupled to the sources for establishing output intensity of light of each of the sources to set contributions of the different colors to the optically integrated light within the cavity and thus set a spectral characteristic of the optically integrated light emitted through the optical passage of the optical integrating cavity.
3 Assignments
0 Petitions
Accused Products
Abstract
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.
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Citations
39 Claims
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1. A system comprising:
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A) a light fixture for a visible illuminating type lighting application, to illuminate or to provide task or object illumination, in a region or area intended to be occupied by a person, the light fixture comprising; 1) an optical integrating cavity having at least one diffusely reflective interior surface and an optical passage through a wall of the cavity for allowing emission of optically integrated light from the cavity; and 2) a plurality of sources of light coupled to directly supply light to the optical integrating cavity in one or more directions to cause substantial portions of light supplied by the sources to reflect from said at least one diffusely reflective surface of the optical integrating cavity one or more times to optically integrate the light from the sources before emission as the optically integrated light through the optical passage of the integrating cavity for the visible lighting application, at least two of the sources emitting light of respective different colors, wherein the sources provide sufficient light energy in the optically integrated light and the optical integrating cavity is configured to direct the optically integrated light emitted through the optical passage in a direction to facilitate said visible illuminating type lighting application; and B) a control circuit coupled to the sources for establishing output intensity of light of each of the sources to set contributions of the different colors to the optically integrated light within the cavity and thus set a spectral characteristic of the optically integrated light emitted through the optical passage of the optical integrating cavity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A system comprising:
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A) a light fixture for a visible illuminating type lighting application, to illuminate or to provide task or object illumination, in a region or area intended to be occupied by a person, the light fixture comprising; 1) one or more first light emitting diodes for emitting light of a first humanly visible color; 2) one or more second light emitting diodes for emitting light of a second humanly visible color, the second color being different from the first color; and 3) an optical integrating cavity, wherein; i) the optical integrating cavity comprises at least one interior surface having a diffuse reflectivity with respect to visible light of the first and second colors, and an optical passage through a wall of the optical integrating cavity; and ii) the first and second light emitting diodes are coupled to directly supply light to the optical integrating cavity in one or more directions to cause substantial portions of light supplied by the light emitting diodes to reflect one or more times from said at least one diffusely reflective surface of the optical integrating cavity so as to integrate substantial portions of the light from the light emitting diodes before emission as optically integrated light through the optical passage, iii) the first and second light emitting diodes provide sufficient light energy in the optically integrated light and the optical integrating cavity is configured to direct the optically integrated light emitted through the optical passage in a direction to facilitate said visible illuminating type lighting application; and B) a control circuit, responsive to a user input relating to a desired spectral characteristic, coupled to the first and second light emitting diodes for establishing output intensity of light of each of the first and second light emitting diodes to set contributions of the different colors to the optically integrated light within the cavity and thus set a spectral characteristic of the optically integrated light emitted through the optical passage responsive to the user input. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A system comprising:
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A) a light fixture for a visible illuminating type lighting application, to illuminate or to provide task or object illumination, in a region or area intended to be occupied by a person, the light fixture comprising; 1) one or more first light emitting diodes for emitting humanly visible light of a first spectral characteristic; 2) one or more second light emitting diodes for emitting humanly visible light of a second spectral characteristic, the second spectral characteristic being different from the spectral characteristic; and 3) an optical integrating cavity, wherein; i)the optical integrating cavity comprises at least one interior surface having a diffuse reflectivity with respect to light emitted by the light emitting diodes, and an optical passage through a wall of the optical integrating cavity; and ii) the first and second light emitting diodes are coupled to directly supply light to the optical integrating cavity in one or more directions to cause substantial portions of light supplied by the light emitting diodes to reflect one or more times from said at least one diffusely reflective surface of the optical integrating cavity to optically integrate the portions of the light from the light emitting diodes before emission as optically integrated light through the optical passage, iii) the first and second light emitting diodes provide sufficient light energy in the optically integrated light and the optical integrating cavity is configured to direct the optically integrated light emitted through the optical passage in a direction to facilitate said visible illuminating type lighting application; and B) a control circuit, responsive to a user input relating to a desired spectral characteristic, coupled to the first and second light emitting diodes for establishing output intensity of light of each of the first and second light emitting diodes to set contributions of the lights of the different spectral characteristics to the optically integrated light within the cavity and thus set a spectral characteristic of the optically integrated light emitted through the optical passage responsive to the user input. - View Dependent Claims (35, 36, 37, 38, 39)
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Specification