公开(公告)号：US20080128735A1

公开(公告)日：2008-06-05

申请号：US11987830

申请日：2007-12-05

申请人： Chul Hee Yoo ,  Young June Yeong ,  Young Sam Park ,  Seong Yeon Han ,  Ho Yeon Kim ,  Hun Joo Hahm ,  Hyung Suk Kim

发明人： Chul Hee Yoo ,  Young June Yeong ,  Young Sam Park ,  Seong Yeon Han ,  Ho Yeon Kim ,  Hun Joo Hahm ,  Hyung Suk Kim

IPC分类号： H01L33/00

CPC分类号： H05B33/12 ,  C09K11/0883 ,  C09K11/7731 ,  C09K11/7734 ,  F21K9/00 ,  G02F1/133603 ,  G02F1/133609 ,  H01L33/504 ,  Y02B20/181

摘要： A white light emitting device including: a blue light emitting diode chip having a dominant wavelength of 443 to 455 nm; a red phosphor disposed around the blue light emitting diode chip, the red phosphor excited by the blue light emitting diode chip to emit red light; and a green phosphor disposed around the blue light emitting diode chip, the green phosphor excited by the blue light emitting diode chip to emit green light, wherein the red light emitted from the red phosphor has a color coordinate falling within a space defined by four coordinate points (0.5448, 0.4544), (0.7079, 0.2920), (0.6427, 0.2905) and (0.4794, 0.4633) based on the CIE 1931 chromaticity diagram, and the green light emitted from the green phosphor has a color coordinate falling within a space defined by four coordinate points (0.1270, 0.8037), (0.4117, 0.5861), (0.4197, 0.5316) and (0.2555, 0.5030) based on the CIE 1931 color chromaticity diagram.