| 发明名称 |
Red fluorescent material, white light emitting diode using red fluorescent material, and lighting device using white light emitting diode |
| 摘要 |
The present invention achieves improvement of the color reproducibility, color rendering properties and light emitting efficiency of a white light emitting diode. The present invention is a red fluorescent material composed of a europium doped calcium lanthanum tungstate represented by a general formula of Ca<SUB>3</SUB>(La<SUB>1-x</SUB>,Eu<SUB>x</SUB>)<SUB>2</SUB>W<SUB>2</SUB>0<SUB>12 </SUB>(0<x<=1). The red fluorescent material can efficiently converts light in the light emission wavelength range from 350 to 410 nm of an ultraviolet light emitting diode into red light, and can efficiently converts blue light at 465 nm and green light at 538 nm into red light.
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| 申请公布号 |
US2005133801(A1) |
申请公布日期 |
2005.06.23 |
| 申请号 |
US20040013879 |
申请日期 |
2004.12.17 |
| 申请人 |
NEC CORPORATION |
发明人 |
YOSHIMATSU RYO;YOSHIDA HISASHI |
| 分类号 |
C09K11/78;C09K11/08;C09K11/68;C09K11/77;C09K11/80;G02F1/13;H01L21/00;H01L27/15;H01L33/48;H01L33/50;(IPC1-7):H01L27/15 |
主分类号 |
C09K11/78 |
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