Methods and apparatus for generating prescribed spectrums of light
First Claim
Patent Images
1. A lighting apparatus comprising:
- a plurality of groups of light-emitting devices including at least one first group of light-emitting devices configured to emit first radiation having a first spectrum and at least one second group of light-emitting devices configured to emit second radiation having a second spectrum different than the first spectrum, wherein the at least one first group and the at least one second group include substantially different quantities of devices; and
a controller configured to control the plurality of groups of light-emitting devices to produce composite radiation having at least one resulting spectrum that simulates a desired spectrum corresponding to sample radiation generated by a predetermined light source.
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Abstract
Lighting apparatus and methods involving a plurality of light-emitting devices configured to emit radiation having at least two different spectra, in which the plurality of light-emitting devices are controlled to produce composite radiation having at least one resulting spectrum that simulates a desired spectrum.
480 Citations
93 Claims
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1. A lighting apparatus comprising:
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a plurality of groups of light-emitting devices including at least one first group of light-emitting devices configured to emit first radiation having a first spectrum and at least one second group of light-emitting devices configured to emit second radiation having a second spectrum different than the first spectrum, wherein the at least one first group and the at least one second group include substantially different quantities of devices; and a controller configured to control the plurality of groups of light-emitting devices to produce composite radiation having at least one resulting spectrum that simulates a desired spectrum corresponding to sample radiation generated by a predetermined light source. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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43. A method, comprising acts of:
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A) emitting first radiation having a first spectrum and second radiation having a second spectrum different than the first spectrum; B) controlling at least one of a first intensity of the first radiation and a second intensity of the second radiation to produce composite radiation having at least one resulting spectrum that simulates a desired spectrum corresponding to sample radiation generated by a predetermined light source; and C) measuring at least one of the composite radiation and the sample radiation generated by the predetermined light source, wherein the predetermined light source includes at least one substantially white light source, wherein the act B) comprises; B1) controlling at least one of the first intensity of the first radiation and the second intensity of the second radiation so as to vary at least one of a color temperature and an intensity of the composite radiation, wherein the act A) comprises; emitting the first radiation and the second radiation via a plurality of light emitting diodes (LEDs), wherein the plurality of LEDs includes at least one white LED, and wherein the at least one white LED includes at least two white LEDs configured to emit radiation having respectively different spectra. - View Dependent Claims (44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65)
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66. A lighting apparatus comprising:
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a plurality of groups of light-emitting devices including at least one first light-emitting device group configured to emit first radiation having a first spectrum and at least one second light-emitting device group configured to emit second radiation having a second spectrum different from the first spectrum, wherein at least two of the plurality of groups of light-emitting devices include different quantities of light-emitting devices; and a controller configurable to supply selected amounts of electrical power to the plurality of groups of light-emitting devices to produce composite radiation, wherein the composite radiation has at least one resulting spectrum including wavelengths only within a contiguous bandwidth of a predetermined target range when the controller supplies prescribed maximum amounts of the electrical power to all of the groups of light-emitting devices. - View Dependent Claims (67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77)
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78. A lighting apparatus comprising:
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five or more groups of light-emitting devices configured to emit radiation having five or more respective different spectra, wherein each of the five or more groups of light-emitting devices includes a plurality of light-emitting diodes (LEDs); and a controller configurable to control the five or more groups of light-emitting devices to produce composite radiation having at least one resulting spectrum that simulates a predetermined desired spectrum. - View Dependent Claims (79, 80, 81, 82, 83, 84, 85, 86, 87, 88)
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89. An apparatus comprising:
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a plurality of light-emitting devices including at least one first light-emitting device configured to emit first radiation having a first spectrum and at least one second light-emitting device configured to emit second radiation having a second spectrum different than the first spectrum; a controller configured to control the plurality of light-emitting devices to produce composite radiation having at least one resulting spectrum that simulates a desired spectrum corresponding to sample radiation generated by a predetermined light source; and at least one sensor configured to measure at least one of the composite radiation produced by the apparatus and the sample radiation generated by the predetermined light source and provide at least one corresponding measurement signal to the controller, wherein the predetermined light source includes at least one substantially white light source, wherein the sample radiation has a predetermined color temperature, wherein the plurality of light emitting devices includes a plurality of light emitting diodes (LEDs), wherein the plurality of LEDs includes at least one white LED, and wherein the at least one white LED includes at least two white LEDs configured to emit radiation having respectively different spectra.
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90. An apparatus comprising:
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a plurality of light-emitting devices including at least one first light-emitting device configured to emit first radiation having a first spectrum and at least one second light-emitting device configured to emit second radiation having a second spectrum different than the first spectrum; a controller configured to control the plurality of light-emitting devices to produce composite radiation having at least one resulting spectrum that simulates a desired spectrum corresponding to sample radiation generated by a predetermined light source; and at least one sensor configured to measure at least one of the composite radiation produced by the apparatus and the sample radiation generated by the predetermined light source and provide at least one corresponding measurement signal to the controller, wherein the predetermined light source includes at least one substantially white light source, wherein the controller is configured to control the plurality of light-emitting devices so as to vary at least one of a color temperature and an intensity of the composite radiation, and wherein the controller is configured to vary the color temperature within a range of from approximately 2300 degrees Kelvin to 4500 degrees Kelvin.
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91. An apparatus comprising:
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a plurality of light-emitting devices including at least one first light-emitting device configured to emit first radiation having a first spectrum and at least one second light-emitting device configured to emit second radiation having a second spectrum different than the first spectrum; a controller configured to control the plurality of light-emitting devices to produce composite radiation having at least one resulting spectrum that simulates a desired spectrum corresponding to sample radiation generated by a predetermined light source; and at least one sensor configured to measure at least one of the composite radiation produced by the apparatus and the sample radiation generated by the predetermined light source and provide at least one corresponding measurement signal to the controller, wherein the predetermined light source includes at least one substantially white light source, wherein the controller is configured to control the plurality of light-emitting devices so as to vary at least one of a color temperature and an intensity of the composite radiation, wherein the plurality of light emitting devices includes a plurality of light emitting diodes (LEDs), wherein the plurality of LEDs includes at least one white LED, and wherein the at least one white LED includes at least two white LEDs configured to emit radiation having respectively different spectra.
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92. A method, comprising acts of:
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A) emitting first radiation having a first spectrum and second radiation having a second spectrum different than the first spectrum; B) controlling at least one of a first intensity of the first radiation and a second intensity of the second radiation to produce composite radiation having at least one resulting spectrum that simulates a desired spectrum corresponding to sample radiation generated by a predetermined light source; and C) measuring at least one of the composite radiation and the sample radiation generated by the predetermined light source, wherein the predetermined light source includes at least one substantially white light source, wherein the sample radiation has a predetermined color temperature, wherein the act A) comprises; emitting the first radiation and the second radiation via a plurality of light emitting diodes (LEDs), wherein the plurality of LEDs includes at least one white LED, and wherein the at least one white LED includes at least two white LEDs configured to emit radiation having respectively different spectra.
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93. A method, comprising acts of:
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A) emitting first radiation having a first spectrum and second radiation having a second spectrum different than the first spectrum; B) controlling at least one of a first intensity of the first radiation and a second intensity of the second radiation to produce composite radiation having at least one resulting spectrum that simulates a desired spectrum corresponding to sample radiation generated by a predetermined light source; and C) measuring at least one of the composite radiation and the sample radiation generated by the predetermined light source, wherein the predetermined light source includes at least one substantially white light source, wherein the act B) comprises; B1) controlling at least one of the first intensity of the first radiation and the second intensity of the second radiation so as to vary at least one of a color temperature and an intensity of the composite radiation, and wherein the act B1) comprises; controlling at least one of the first intensity of the first radiation and the second intensity of the second radiation so as to vary the color temperature within a range of from approximately 2300 degrees Kelvin to 4500 degrees Kelvin.
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Specification