发明名称 |
LIGHT EMITTING DEVICE AND ILLUMINATION DEVICE |
摘要 |
Provided is a white LED of a high color rendering characteristic having an average color rendering evaluation value exceeding 90 by using a blue LED element. The white LED includes a semiconductor light emitting element emitting a blue light or blue-violet light and a fluorescent material absorbing a part or whole of the light emitted from the semiconductor light emitting element and emitting a fluorescent light of a wavelength different from the light. The fluorescent material is a mixed fluorescent material obtained by mixing a first fluorescent material emitting a blue-green light or a green light, a second fluorescent material having a light emitting peak wavelength longer than the first fluorescent material and emitting a green light or a yellow-green light, a third fluorescent material having a light emitting peak wavelength longer than the second fluorescent material and emitting a yellow-green light, a yellow light, or a yellow-red light, and a fourth fluorescent material having a light emitting peak wavelength longer than the third fluorescent material and emitting a yellow-red light or a red light. |
申请公布号 |
WO2008020541(A1) |
申请公布日期 |
2008.02.21 |
申请号 |
WO2007JP64861 |
申请日期 |
2007.07.30 |
申请人 |
FUJIKURA LTD.;NATIONAL INSTITUTE FOR MATERIALS SCIENCE;KIMURA, NAOKI;SUZUKI, RYUJI;SAKUMA, KEN;HIROSAKI, NAOTO |
发明人 |
KIMURA, NAOKI;SUZUKI, RYUJI;SAKUMA, KEN;HIROSAKI, NAOTO |
分类号 |
C09K11/08;C09K11/59;C09K11/64;H01L33/50 |
主分类号 |
C09K11/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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