发明申请
- 专利标题: LIGHT EMITTING DEVICE
- 专利标题(中): 发光装置
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申请号: US14122683申请日: 2012-04-02
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公开(公告)号: US20140233209A1公开(公告)日: 2014-08-21
- 发明人: Kenichi Yoshimura , Kohsei Takahashi , Hiroshi Fukunaga , Masatsugu Masuda
- 申请人: Kenichi Yoshimura , Kohsei Takahashi , Hiroshi Fukunaga , Masatsugu Masuda
- 申请人地址: JP Osaka-shi, Osaka
- 专利权人: SHARP KABUSHIKI KAISHA
- 当前专利权人: SHARP KABUSHIKI KAISHA
- 当前专利权人地址: JP Osaka-shi, Osaka
- 优先权: JP2011-121811 20110531
- 国际申请: PCT/JP2012/058861 WO 20120402
- 主分类号: F21V9/16
- IPC分类号: F21V9/16
摘要:
Provided is a light emitting device with effectively improved color rendering properties. A light emitting device 1 includes: a light source 2 that emits light having the maximum intensity at a predetermined wavelength; a first phosphor (yellow phosphor) 51 that absorbs the light emitted by the light source 2 and outputs fluorescent light having the maximum intensity at a first wavelength which is longer than the predetermined wavelength; and a second phosphor (red phosphor) 52 that absorbs the light emitted by the light source 2 and outputs fluorescent light having the maximum intensity at a second wavelength which is longer than the first wavelength. An absolute value of wavelength dependency of an optical absorption rate of the second phosphor 52 at the first wavelength is set to not more than 0.6%/nm. Accordingly, the color rendering properties of the light emitted by the light emitting device 1 can be effectively improved.
公开/授权文献
- US09322529B2 Light emitting device 公开/授权日:2016-04-26
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