Invention Grant
- Patent Title: Light emitting device and illumination device
- Patent Title (中): 发光装置及照明装置
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Application No.: US12369351Application Date: 2009-02-11
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Publication No.: US08053970B2Publication Date: 2011-11-08
- Inventor: Naoki Kimura , Ryuji Suzuki , Ken Sakuma , Naoto Hirosaki
- Applicant: Naoki Kimura , Ryuji Suzuki , Ken Sakuma , Naoto Hirosaki
- Applicant Address: JP Tokyo JP Ibaraki-ken
- Assignee: Fujikura Ltd.,National Institute for Materials Science
- Current Assignee: Fujikura Ltd.,National Institute for Materials Science
- Current Assignee Address: JP Tokyo JP Ibaraki-ken
- Agency: Sughrue Mion, PLLC
- Priority: JP2006-221062 20060814
- Main IPC: H05B33/14
- IPC: H05B33/14

Abstract:
An LED with a semiconductor light emitting element that emits a blue or a blue-violet light, and a fluorescent material that absorbs some or all of the light emitted from the element and emits a fluorescent light of a wavelength different from the absorbed light. The fluorescent material is a mixed fluorescent material obtained by mixing a first fluorescent material that emits a blue-green or a green light, a second fluorescent material that has a peak emission wavelength longer than that of the first fluorescent material and emits a green or a yellow-green light, a third fluorescent material that has a 1 peak emission wavelength longer than that of the second fluorescent material and emits a yellow-green, a yellow or a yellow-red light, and a fourth fluorescent material that has a peak emission wavelength longer than that of the third fluorescent material and emits a yellow-red or a red light.
Public/Granted literature
- US20090146549A1 LIGHT EMITTING DEVICE AND ILLUMINATION DEVICE Public/Granted day:2009-06-11
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