System and method for regulation of solid state lighting
First Claim
1. An illumination control method for a plurality of light emitting diodes, the plurality of light emitting diodes comprising at least one or more first light emitting diodes having a first spectrum and at least one or more second light emitting diodes having a second, different spectrum, a first electrical biasing for the at least one or more first light emitting diodes producing a first wavelength shift, a second electrical biasing for the at least one or more first light emitting diodes producing a second wavelength shift opposing the first wavelength shift, a third electrical biasing for the at least one or more second light emitting diodes producing a third wavelength shift, a fourth electrical biasing for the at least one or more second light emitting diodes producing a fourth wavelength shift opposing the third wavelength shift, the method comprising:
- monitoring an input control signal, the input control signal designating a first intensity level for the at least one or more first light emitting diodes and a second intensity level for the at least one or more second light emitting diodes;
retrieving a first plurality of parameters stored in a memory, the plurality of parameters designating a corresponding combination of the first electrical biasing and the second electrical biasing for the first intensity level;
retrieving a second plurality of parameters stored in the memory, the second plurality of parameters designating a corresponding combination of the third electrical biasing and the fourth electrical biasing for the second intensity level;
processing the first plurality of parameters into at least one first input electrical biasing control signal for the at least one or more first light emitting diodes;
processing the second plurality of parameters into at least one second input electrical biasing control signal for the at least one or more second light emitting diodes;
operating the at least one or more first light emitting diodes with a first time-averaged modulation of forward current conforming to the at least one first input electrical biasing control signal to provide the first intensity level; and
operating the at least one or more second light emitting diodes with a second time-averaged modulation of forward current conforming to the at least one second input electrical biasing control signal to provide the second intensity level independently of the first intensity level.
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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.
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Citations
79 Claims
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1. An illumination control method for a plurality of light emitting diodes, the plurality of light emitting diodes comprising at least one or more first light emitting diodes having a first spectrum and at least one or more second light emitting diodes having a second, different spectrum, a first electrical biasing for the at least one or more first light emitting diodes producing a first wavelength shift, a second electrical biasing for the at least one or more first light emitting diodes producing a second wavelength shift opposing the first wavelength shift, a third electrical biasing for the at least one or more second light emitting diodes producing a third wavelength shift, a fourth electrical biasing for the at least one or more second light emitting diodes producing a fourth wavelength shift opposing the third wavelength shift, the method comprising:
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monitoring an input control signal, the input control signal designating a first intensity level for the at least one or more first light emitting diodes and a second intensity level for the at least one or more second light emitting diodes; retrieving a first plurality of parameters stored in a memory, the plurality of parameters designating a corresponding combination of the first electrical biasing and the second electrical biasing for the first intensity level; retrieving a second plurality of parameters stored in the memory, the second plurality of parameters designating a corresponding combination of the third electrical biasing and the fourth electrical biasing for the second intensity level; processing the first plurality of parameters into at least one first input electrical biasing control signal for the at least one or more first light emitting diodes; processing the second plurality of parameters into at least one second input electrical biasing control signal for the at least one or more second light emitting diodes; operating the at least one or more first light emitting diodes with a first time-averaged modulation of forward current conforming to the at least one first input electrical biasing control signal to provide the first intensity level; and operating the at least one or more second light emitting diodes with a second time-averaged modulation of forward current conforming to the at least one second input electrical biasing control signal to provide the second intensity level independently of the first intensity level. - 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)
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27. A lighting system having variable intensity, the system comprising:
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a plurality of light emitting diodes, the plurality of light emitting diodes comprising at least one or more first light emitting diodes connected in a first channel and having a first spectrum and at least one or more second light emitting diodes connected in a second channel and having a second, different spectrum, a first electrical biasing for the at least one or more first light emitting diodes producing a first wavelength shift, a second electrical biasing for the at least one or more first light emitting diodes producing a second wavelength shift opposing the first wavelength shift, a third electrical biasing for the at least one or more second light emitting diodes producing a third wavelength shift, a fourth electrical biasing for the at least one or more second light emitting diodes producing a fourth wavelength shift opposing the third wavelength shift; at least one first driver circuit coupled to the at least one or more first light emitting diodes, the at least one first driver circuit comprising a first regulator and a first power converter, the at least one first driver circuit adapted to respond to a first plurality of input operational signals to provide a first combination of the first electrical biasing and the second electrical biasing to the at least one or more first light emitting diodes; at least one second driver circuit coupled to the at least one or more second light emitting diodes, the at least one second driver circuit comprising a second regulator and a second power converter, the at least one second driver circuit adapted to respond to a second plurality of input operational signals to provide a second combination of the third electrical biasing and the fourth electrical biasing to the at least one or more second light emitting diodes; at least one first controller couplable to a user interface and coupled to the at least one first driver circuit, the at least one first controller further comprising a first memory, the at least one first controller adapted to retrieve a first plurality of parameters stored in the first memory, the first plurality of parameters corresponding to a first intensity level provided by the user interface and designating the first combination of the first electrical biasing and the second electrical biasing;
the at least one first controller further adapted to convert the first plurality of parameters into at least one first input operational control signal to provide the first intensity level of the at least one or more first light emitting diodes with wavelength emission control; andat least one second controller couplable to the user interface and coupled to the at least one second driver circuit, the at least one second controller further comprising a second memory, the at least one second controller adapted to retrieve a second plurality of parameters stored in the second memory, the second plurality of parameters corresponding to a second intensity level provided by the user interface and designating the second combination of the third electrical biasing and the fourth electrical biasing;
the at least one second controller further adapted to convert the second plurality of parameters into at least one second input operational control signal to provide the second intensity level of the at least one or more second light emitting diodes with wavelength emission control. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 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, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79)
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Specification