HIGH CRI LIGHTING DEVICE WITH ADDED LONG-WAVELENGTH BLUE COLOR
First Claim
1. A lighting device comprising:
- at least one first solid state emitter having a first dominant wavelength in a range of from 430 nm to 470 nm;
at least one second solid state emitter having a second dominant wavelength in a range of from 471 nm to 510 nm;
at least one third solid state emitter having a third dominant wavelength in a range of from 600 nm to 650 nm; and
at least one lumiphor arranged to receive emissions from any of the at least one first solid state emitter, the at least one second solid state emitter, and the at least one third solid state emitter, and to responsively emit light having a fourth dominant wavelength that differs from the first, second, and third dominant wavelength;
wherein spectral output of the lighting device includes in combination at least a portion of emissions from each of the at least one first solid state emitter, the at least one second solid state emitter, the at least one third solid state emitter, and the at least one lumiphor.
3 Assignments
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Accused Products
Abstract
Solid state lighting devices include least one solid state emitter and multiple lumiphors, arranged to output aggregated emissions comprising at least one short wavelength blue peak, at least one long wavelength blue (LWB) peak, at least one yellow and/or green peak, and at least one red and/or orange peak. Presence of long wavelength blue enhances color rendering. At least one solid state emitter may include a short wavelength blue LED, LWB LED, and/or UV LED. Multiple emitters may be provided. Resulting devices may provide CRI greater than 85, efficiency of greater than 50 lm/watt, and color stability in a range of Δu′v′≦0.008 over a temperature change of 75° C.
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Citations
15 Claims
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1. A lighting device comprising:
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at least one first solid state emitter having a first dominant wavelength in a range of from 430 nm to 470 nm; at least one second solid state emitter having a second dominant wavelength in a range of from 471 nm to 510 nm; at least one third solid state emitter having a third dominant wavelength in a range of from 600 nm to 650 nm; and at least one lumiphor arranged to receive emissions from any of the at least one first solid state emitter, the at least one second solid state emitter, and the at least one third solid state emitter, and to responsively emit light having a fourth dominant wavelength that differs from the first, second, and third dominant wavelength; wherein spectral output of the lighting device includes in combination at least a portion of emissions from each of the at least one first solid state emitter, the at least one second solid state emitter, the at least one third solid state emitter, and the at least one lumiphor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification