Invention Grant
- Patent Title: Light-emitting device
- Patent Title (中): 发光装置
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Application No.: US13580791Application Date: 2011-01-27
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Publication No.: US08674392B2Publication Date: 2014-03-18
- Inventor: Kenichi Yoshimura , Hiroshi Fukunaga , Kohsei Takahashi , Naoto Hirosaki
- Applicant: Kenichi Yoshimura , Hiroshi Fukunaga , Kohsei Takahashi , Naoto Hirosaki
- Applicant Address: JP Osaka-shi
- Assignee: Sharp Kabushiki Kaisha
- Current Assignee: Sharp Kabushiki Kaisha
- Current Assignee Address: JP Osaka-shi
- Agency: Morrison & Foerster LLP
- Priority: JP2010-043107 20100226
- International Application: PCT/JP2011/051600 WO 20110127
- International Announcement: WO2011/105157 WO 20110901
- Main IPC: H01L33/00
- IPC: H01L33/00

Abstract:
Disclosed is a light-emitting device that exhibits good color rendering and highly efficiently emits white light in an incandescent bulb color range. The semiconductor light-emitting device (1) of the present invention includes: a semiconductor light-emitting element (2) that emits blue light; a green phosphor (14) that absorbs the blue light and emits green light; and an orange phosphor (13) that absorbs the blue light and emits orange light. The orange phosphor (13) produces an emission spectrum having a peak at a wavelength of equal to or greater than 590 nm but equal to or less than 630 nm and having a full width at half maximum of 130 nm or greater at the peak, the full width at half maximum of the emission spectrum of the orange phosphor (13) being broader than a full width at half maximum of an emission spectrum of the green phosphor (14). The orange phosphor (13) exhibits an absorptance having a peak wavelength of 420 nm or greater. ABS(530) and ABS(MAX) satisfy a relation, ABS(530)/ABS(MAX)
Public/Granted literature
- US20120319155A1 LIGHT-EMITTING DEVICE Public/Granted day:2012-12-20
Information query
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