Patent ID: 9012937
Filing Date: 2015-04-21
Classification: C09K,H01L

Abstract:
1. An emitter package, comprising: a plurality of light emitting diodes (LED) emitting light within a wavelength range, wherein said wavelength range width is at least 10 nm and up to 50 nm; a plurality of phosphors, said plurality of phosphors comprising at least two different phosphors, said at least two different phosphors having emission wavelengths and excitation characteristics such that a first of said phosphors has an increased excitation efficiency at longer wavelengths, within said wavelength range, compared to a second of said phosphors having a decreased excitation efficiency at the same longer wavelengths, each of which absorbs at least some light from said LED and re-emits a different wavelength of light, wherein the same plurality of phosphors is over at least two of said LEDs; and wherein said emitter package emits a combination of light from said LED and said plurality of phosphors, in which said package emission is within a 4-step MacAdam ellipse around a target color, regardless of variations in the wavelength emitted, within said wavelength range, from said LED.