| 发明名称 |
RED PHOSPHOR MATERIAL, WHITE LIGHT-EMITTING DIODE USING THE SAME, AND ILLUMINATOR USING THE WHITE LIGHT-EMITTING DIODE |
| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a white light-emitting diode improved in color reproducibility, color rendering tendency and luminous efficiency. <P>SOLUTION: A red phosphor material consisting of an europium-activated calcium-lanthanum tungstate of the general formula: Ca<SB>3</SB>(La<SB>1-x</SB>Eu<SB>x</SB>)W<SB>2</SB>O<SB>12</SB>(0<x≤1) is provided. The white light-emitting diode using the red phosphor material is also provided. This diode efficiently emits red color in the luminous wavelength region for ultraviolet light-emitting diode, i.e. 350-410 nm and also can efficiently convert to red color the rays of about 465 nm falling in the wavelength region for blue light-emitting diode and rays of about 538 nm falling in the wavelength region for green light-emitting diode, respectively. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
| 申请公布号 |
JP2005179498(A) |
申请公布日期 |
2005.07.07 |
| 申请号 |
JP20030422348 |
申请日期 |
2003.12.19 |
| 申请人 |
NEC LIGHTING LTD |
发明人 |
YOSHIMATSU MAKOTO;YOSHIDA HISAFUMI |
| 分类号 |
C09K11/78;C09K11/08;C09K11/68;C09K11/77;C09K11/80;G02F1/13;H01L21/00;H01L27/15;H01L33/48;H01L33/50 |
主分类号 |
C09K11/78 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
|
| 地址 |
|
