Invention Grant
- Patent Title: Light-emitting device
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Application No.: US15760785Application Date: 2016-09-20
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Publication No.: US10707189B2Publication Date: 2020-07-07
- Inventor: Masahiko Hamada , Hirohiko Ishii
- Applicant: CITIZEN ELECTRONICS CO., LTD. , CITIZEN WATCH CO., LTD.
- Applicant Address: JP Yamanashi JP Tokyo
- Assignee: Citizen Electronics Co., Ltd.,Citizen Watch Co., Ltd.
- Current Assignee: Citizen Electronics Co., Ltd.,Citizen Watch Co., Ltd.
- Current Assignee Address: JP Yamanashi JP Tokyo
- Agency: RatnerPrestia
- Priority: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@46b6d1cb
- International Application: PCT/JP2016/077736 WO 20160920
- International Announcement: WO2017/047815 WO 20170323
- Main IPC: H01L25/075
- IPC: H01L25/075 ; G02B5/02 ; H01L33/52 ; H01L33/56 ; H01L33/60 ; H01L33/48 ; H01L33/50

Abstract:
A light-emitting device is provided whose color mixing property and light emission efficiency are improved, while white light with high color rendering performance is ensured by means of four kinds of LED elements emitting red, green, blue, and white light respectively. The light-emitting device includes a phosphor layer containing a phosphor, a first LED element to emit white light in combination with fluorescence generated by excitation of the phosphor, a second LED element to emit red light, a third LED element to emit green light, a fourth LED element to emit blue light placed more distant from the phosphor layer compared to the second and third LED elements, a substrate with the first to fourth LED elements mounted on a common mounting surface, a resin frame surrounding at least a part of an outer circumference of the substrate, a sealing resin injected inside the resin frame and on the substrate to encapsulate the first to fourth LED elements, and a light-shielding component placed on an upper surface of the sealing resin to cover at least the first LED element.
Public/Granted literature
- US20180254263A1 LIGHT-EMITTING DEVICE Public/Granted day:2018-09-06
Information query
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