LED COLOR CHANNELS INCLUDING PHOSPHOR-BASED LEDS FOR HIGH LUMINOUS EFFICACY LIGHT SOURCE

摘要

A light source apparatus is disclosed. The light source includes an array of light emitting diodes (LEDs) including at least three color channels, the at least three color channels includes: a yellow-greenish channel including a YAG:Ce phosphor emitter pumped by a royal blue InGaN LED; a red channel including a second LED, the second LED being either phosphor-based LED or AlInGaP LED; and a blue green channel including a third LED wherein the third LED is a royal blue InGaN LED. The light source further includes a mixing barrel around the array of LEDs for mixing light generated from the three color channels to simulate a black body radiator at different correlated color temperatures. Each of the at least three color channels includes one or more LEDs emitting the same color.