White phosphor, light emission device including the same,...

Details White phosphor, light emission device including the same,... White phosphor, light emission device including the same,...

2008-08-27

2010-11-23

Healy, Brian M (Department: 2883)

Liquid crystal cells, elements and systems

Particular structure

Particular illumination

C349S069000, C252S30140R, C313S503000

Reexamination Certificate

active

07839468

ABSTRACT:
A white phosphor, a light emission device including the same, and a liquid crystal display (LCD) including the light emission device as a backlight unit. The white phosphor includes: 40 to 50 parts by weight of a blue phosphor selected from the group consisting of ZnS:(Ag,Cl), ZnS:(Ag,Al), ZnS:(Ag,Al,Cl), and a combination thereof; 23 to 36 parts by weight of a green phosphor including (Sr1-xCax)Ga2S4:Eu (0≦x<0.2) and a compound selected from the group consisting of ZnS:(Cu,Al), ZnS:(Cu,Au,Al), and a combination thereof; and 20 to 30 parts by weight of a red phosphor selected from the group consisting of Y2O3:Eu, Y2O3:(Eu,Tb), Y2O2S:Eu, Y2O2S:(Eu,Tb), and a combination thereof.

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Office Action issued in corresponding European Patent Application No. 08168571.1 dated Jan. 27, 2009.
English Abstract for Korean Publication No. 10-2002-0072868.
U.S. Appl. No. 12/199,209, filed Aug. 27, 2008, Yong-Chan You et al., Samsung SDI Co., Ltd.

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