Patent ID: 9605808
Date: 2017-03-28
CPC Classifications: F21K,F21Y,H01L,H05B

Claim:
1. A lighting device comprising: a first group of solid state light emitters; a second group of solid state light emitters; and a third group of solid state light emitters, the first group of solid state light emitters comprising at least one light emitting diode, each light emitting diode in the first group of solid state light emitters emitting light having a dominant wavelength within a range of from about 430 nm to about 490 nm, each solid state light emitter in the second group of solid state light emitters comprising a light emitting diode and at least one luminescent material, each solid state light emitter in the second group of solid state light emitters emitting light having a dominant wavelength in the range of from about 525 nm to about 575 nm, the third group of solid state light emitters comprising at least one light emitting diode, each light emitting diode in the third group of solid state light emitters emitting light having a dominant wavelength within a range of from about 610 nm to about 640 nm, the lighting device configured to change current supplied to at least one light emitting diode selected from among the first group of solid state light emitters, the third group of solid state light emitters, and the light emitting diodes in the second group of solid state light emitters by an amount that is not proportional to a change in current supplied to at least one other light emitting diode selected from among the first group of solid state light emitters, the third group of solid state light emitters, and the light emitting diodes in the second group of solid state light emitters.