Invention Grant
- Patent Title: Light-emitting device
- Patent Title (中): 发光装置
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Application No.: US13381348Application Date: 2010-07-02
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Publication No.: US08928005B2Publication Date: 2015-01-06
- Inventor: Kenichi Yoshimura , Kohsei Takahashi , Hiroshi Fukunaga , Naoto Hirosaki
- Applicant: Kenichi Yoshimura , Kohsei Takahashi , Hiroshi Fukunaga , Naoto Hirosaki
- Applicant Address: JP Osaka-shi JP Tsukuba-shi
- Assignee: Sharp Kabushiki Kaisha,Independent Administrative Institution, National Institute for Materials Science
- Current Assignee: Sharp Kabushiki Kaisha,Independent Administrative Institution, National Institute for Materials Science
- Current Assignee Address: JP Osaka-shi JP Tsukuba-shi
- Agency: Morrison & Foerster LLP
- Priority: JP2009-157930 20090702; JP2010-022512 20100203
- International Application: PCT/JP2010/061345 WO 20100702
- International Announcement: WO2011/002087 WO 20110106
- Main IPC: H01L33/00
- IPC: H01L33/00

Abstract:
A semiconductor light-emitting device that is high in luminous efficiency and that emits light which is high in color rendering property includes a semiconductor light-emitting element that emits blue light; a green fluorescent substance that absorbs the blue light and emits green light; and an orange fluorescent substance that absorbs the blue light and emits orange light, fluorescence emitted by the green fluorescent substance and the orange fluorescent substance having an emission spectrum that has a peak wavelength of not less than 540 nm and not more than 565 nm and that satisfies the relation of 0.70>PI(90)/PI(MAX)>0.55, where PI(MAX) represents an emission intensity at the peak wavelength, and PI(90) represents an emission intensity at a wavelength 90 nm longer than the peak wavelength.
Public/Granted literature
- US20120104448A1 LIGHT-EMITTING DEVICE Public/Granted day:2012-05-03
Information query
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