WHITE LIGHT-EMITTING DEVICE AND LIGHTING FIXTURE

文件类型：PDF文档
文件大小：210K
PROBLEM TO BE SOLVED : To provide a technology of reducing the usage of a fluoride complex phosphor activated with Mn4+ without lowering the luminous efficiency in a white light-emitting device comprising a fluoride complex phosphor activated with Mn4+ and an LED element which is an excitation source of the phosphor. SOLUTION : The white light-emitting device comprises a blue LED element, a yellow phosphor and/or a green phosphor as a phosphor excited by the blue LED element, and a red phosphor. The red phosphor contains a fluoride complex phosphor activated with Mn4+ and an alkaline-earth silicon nitride phosphor activated with Eu2+. COPYRIGHT : (C)2012, JPO&INPIT