Invention Grant
- Patent Title: Light-emitting device
- Patent Title (中): 发光装置
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Application No.: US14900056Application Date: 2014-06-19
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Publication No.: US09590150B2Publication Date: 2017-03-07
- Inventor: Johan Ekman , Atsushi Suzuki , Fumiharu Teramae , Tomohiko Maeda , Koichi Naniwae
- Applicant: EL-SEED CORPORATION
- Applicant Address: JP Nagoya-Shi, Aichi
- Assignee: EL-SEED CORPORATION
- Current Assignee: EL-SEED CORPORATION
- Current Assignee Address: JP Nagoya-Shi, Aichi
- Agency: McGinn IP Law Group, PLLC
- Priority: JP2013-130062 20130620; JP2013-130063 20130620
- International Application: PCT/JP2014/066307 WO 20140619
- International Announcement: WO2014/203974 WO 20141224
- Main IPC: H01L33/00
- IPC: H01L33/00 ; H01L33/50 ; C09K11/65 ; H01L27/15 ; H01L33/06 ; H01L33/32 ; F21Y101/00

Abstract:
In order to provide a light-emitting device having improved color rendering properties, a light-emitting device which uses a SiC fluorescent material comprises a first SiC fluorescent portion in which a donor impurity and an acceptor impurity are added and which is formed of a SiC crystal; a second SiC fluorescent portion which is formed of a SiC crystal in which the same donor impurity as the first SiC fluorescent portion and the same acceptor impurity as the first SiC fluorescent portion are added, and in which a concentration of the acceptor impurity is higher than the concentration of the acceptor impurity in the first SiC fluorescent portion and an emission wavelength is longer than that of the first SiC fluorescent portion; and a light-emitting portion that emits excitation light that excites the first SiC fluorescent portion and the second SiC fluorescent portion. The color rendering property of the SiC fluorescent material is improved and it becomes easy to adjust the color temperature and the color rendering index of the light-emitting device which uses the SiC fluorescent material.
Public/Granted literature
- US20160141464A1 LIGHT-EMITTING DEVICE Public/Granted day:2016-05-19
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