Patent ID: 9151464
Filing Date: 2015-10-06
Classification: F21V,F21W,F21Y

Abstract:
1. A light source unit comprising at least one LED sub light source unit, wherein each LED sub light source unit comprises three types of LEDs: phosphor converted green LED having CIE 1931 color location coordinates in the range x=0.35 to 0.39 and y=0.42 to 0.54, orange-red LED with a spectral emission in the wavelength range 614 nm to 622 nm and blue LED with a spectral emission in the wavelength range 460 nm to 476 nm, wherein each LED sub light source unit comprises 27 LEDs including 15 phosphor-converted green LEDs, seven orange-red LEDs and five blue LEDs, wherein the 27 LEDs are arranged as follows: a vertical column formed by three LEDs in a center, an inner ring surrounding the vertical column, and an outer ring surrounding the inner ring, and wherein the vertical column includes a phosphor-converted green LED in a middle, and a blue LED and an orange-red LED respectively on a top and at a bottom; eight phosphor-converted green LEDs are distributed on the inner ring with two green LEDs forming a row with the phosphor-converted green LED in the middle; and four blue LEDs, six green LEDs and six orange-red LEDs are distributed on the outer ring with one phosphor-converted green LED between two orange-red LEDs and one orange-red LED between two phosphor-converted green LEDs being arranged alternatively between each two blue LEDs.