Regulation of Wavelength Shift and Perceived Color of Solid State Lighting with Intensity Variation
First Claim
34. An apparatus for adjusting an intensity of light emitted from a solid state lighting system, the apparatus couplable to the solid state lighting having a first emitted spectrum at full intensity, a first electrical biasing for the solid state lighting producing a first wavelength shift, a second electrical biasing for the solid state lighting producing a second, opposing wavelength shift, the apparatus comprising:
- an interface adapted to receive information designating a selected intensity level lower than full intensity;
a memory adapted to store a plurality of parameters corresponding to a plurality of intensity levels, at least one parameter of the plurality of parameters corresponding to the selected intensity level; and
a controller coupled to the memory, the controller adapted to retrieve from the memory the at least one parameter and to convert the at least one parameter into a corresponding control signal to provide a combined first electrical biasing and second electrical biasing to the solid state lighting to generate emitted light having the selected intensity level and having a second emitted spectrum within a predetermined variance of the first emitted spectrum.
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Accused Products
Abstract
Exemplary embodiments of the invention provide a system, apparatus, and method of controlling an intensity and spectrum of light emitted from a solid state lighting system. The solid state lighting has a first emitted spectrum at full intensity and at a selected temperature, with a first electrical biasing for the solid state lighting producing a first wavelength shift, and a second electrical biasing for the solid state lighting producing a second, opposing wavelength shift. Exemplary embodiments provide for receiving information designating a selected intensity level or a selected temperature; and providing a combined first electrical biasing and second electrical biasing to the solid state lighting to generate emitted light having the selected intensity level and having a second emitted spectrum within a predetermined variance of the first emitted spectrum over a predetermined range of temperatures.
177 Citations
93 Claims
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34. An apparatus for adjusting an intensity of light emitted from a solid state lighting system, the apparatus couplable to the solid state lighting having a first emitted spectrum at full intensity, a first electrical biasing for the solid state lighting producing a first wavelength shift, a second electrical biasing for the solid state lighting producing a second, opposing wavelength shift, the apparatus comprising:
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an interface adapted to receive information designating a selected intensity level lower than full intensity; a memory adapted to store a plurality of parameters corresponding to a plurality of intensity levels, at least one parameter of the plurality of parameters corresponding to the selected intensity level; and a controller coupled to the memory, the controller adapted to retrieve from the memory the at least one parameter and to convert the at least one parameter into a corresponding control signal to provide a combined first electrical biasing and second electrical biasing to the solid state lighting to generate emitted light having the selected intensity level and having a second emitted spectrum within a predetermined variance of the first emitted spectrum. - View Dependent Claims (1, 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, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59)
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55-1. The apparatus of claim 54, wherein at least three arrays of the plurality of arrays of light emitting diodes have corresponding emission spectra of different colors.
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60. A solid state lighting system, comprising:
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a plurality of arrays of light emitting diodes having a first emitted spectrum at full intensity, a first electrical biasing for at least one array of the plurality of arrays producing a first wavelength shift, a second electrical biasing for the at least one array of the plurality of arrays producing a second, opposing wavelength shift; a plurality of driver circuits, each driver circuit coupled to a corresponding array of the plurality of arrays of light emitting diodes; an interface adapted to receive information designating a selected intensity level lower than full intensity; a memory adapted to store a plurality of parameters corresponding to a plurality of intensity levels, at least one parameter of the plurality of parameters corresponding to the selected intensity levels; and at least one controller coupled to the memory and to a first driver circuit of the plurality of driver circuits, the controller adapted to retrieve from the memory the at least one parameter and to convert the at least one parameter into a corresponding control signal to the first driver circuit to provide a combined first electrical biasing and second electrical biasing to the corresponding array to generate emitted light having the selected intensity level and having a second emitted spectrum within a predetermined variance of the first emitted spectrum. - View Dependent Claims (61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72)
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73. A solid state lighting system, comprising:
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a plurality of arrays of light emitting diodes, a first array of the plurality of arrays having a first emitted spectrum at full intensity, a first electrical biasing for the first array of the plurality of arrays producing a first wavelength shift, a second electrical biasing for the first array of the plurality of arrays producing a second, opposing wavelength shift; at least one driver circuit coupled to the first array of the plurality of arrays of light emitting diodes; an interface adapted to receive information designating a selected intensity level lower than full intensity; a memory adapted to store a plurality of parameters corresponding to a plurality of intensity levels, at least one parameter of the plurality of parameters corresponding to the selected intensity level; and at least one controller coupled to the memory and to the at least one driver circuit, the controller adapted to retrieve from the memory the at least one parameter and to convert the at least one parameter into a corresponding control signal to the at least one driver circuit to provide a combined first electrical biasing and second electrical biasing to the first array to generate emitted light having the selected intensity level and having a second emitted spectrum within a predetermined variance of the first emitted spectrum. - View Dependent Claims (74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91)
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92. An apparatus for controlling an intensity of light emitted from an array of light emitting diodes, the apparatus couplable to the array having a first emitted spectrum at full intensity and at a selected temperature, a first electrical biasing for the array producing a first wavelength shift, a second electrical biasing for the array producing a second, opposing wavelength shift, the apparatus comprising:
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an interface adapted to receive information designating a selected intensity level lower than full intensity; a memory adapted to store a plurality of parameters corresponding to a plurality of intensity levels and a plurality of temperatures, at least one parameter of the plurality of parameters corresponding to the selected intensity level and a sensed or determined temperature; and a controller coupled to the memory, the controller adapted to retrieve from the memory the at least one parameter and to convert the at least one parameter into a corresponding control signal to provide a combined first electrical biasing and second electrical biasing to the array to generate emitted light having the selected intensity level and having a second emitted spectrum within a predetermined variance of the first emitted spectrum.
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93. A method of controlling an intensity of light emitted from a solid state lighting system with compensation for spectral changes due to temperature variation, the solid state lighting having a first emitted spectrum at full intensity, a first electrical biasing for the solid state lighting producing a first wavelength shift, a second electrical biasing for the solid state lighting producing a second, opposing wavelength shift, the method comprising:
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receiving information designating a selected intensity level lower than full intensity; determining a temperature associated with the solid state lighting; and providing a combined first electrical biasing and second electrical biasing to the solid state lighting to generate emitted light having the selected intensity level over a predetermined range of temperatures and having a second emitted spectrum within a predetermined variance of the first emitted spectrum.
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Specification