White color light emitting device

Details White color light emitting device White color light emitting device

H - Electricity

01

L

H01L 33/50 (2010.01)

Patent

CA 2427559

An ultraviolet type white color light emitting device (Q) including a 340nm- 400nm ultraviolet InGaN-LED, a first fluorescence plate of ZnS doped with more than 1 × 10 17 cm- Al, In, Ga, Cl, Br or I for absorbing ultraviolet rays and producing blue light (fluorescence), a second fluorescence plate of ZnSSe or ZnSe doped with more than 1 × 10 17 cm-3 Al, In, Ga, Cl, Br or I for absorbing the blue light, producing yellow light (fluorescence) and synthesizing white color light by mixing the yellow light with the blue light. A blue light type white color light emitting device (R) including a 410nm- 470nm blue light InGaN-LED, a fluorescence plate of ZnS x Se 1-x (untreated 0.2 ~ × ~ 0.6; heat- treated 0.3 ~ × ~ 0.67) doped with more than 1 × 10 17 cm-3 Al, In, Ga, Cl, Br or I for absorbing the blue light, producing 568nm-580nm yellow light (fluorescence) and synthesizing white color light by mixing the yellow light with the blue LED light.

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