Invention Grant
- Patent Title: Wavelength conversion member, light-emitting device, and method for manufacturing wavelength conversion member
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Application No.: US16335691Application Date: 2017-09-20
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Publication No.: US10580944B2Publication Date: 2020-03-03
- Inventor: Tadahito Furuyama , Shunsuke Fujita
- Applicant: NIPPON ELECTRIC GLASS CO., LTD.
- Applicant Address: JP Shiga
- Assignee: NIPPON ELECTRIC GLASS CO., LTD.
- Current Assignee: NIPPON ELECTRIC GLASS CO., LTD.
- Current Assignee Address: JP Shiga
- Agency: Keating and Bennett, LLP
- Priority: JP2016-214845 20161102
- International Application: PCT/JP2017/033879 WO 20170920
- International Announcement: WO2018/083903 WO 20180511
- Main IPC: H01L33/50
- IPC: H01L33/50 ; G02B1/111 ; G03B21/20 ; H01L33/44 ; F21K9/64

Abstract:
Provided is a wavelength conversion member that can increase the light extraction efficiency to improve the luminous efficiency. A wavelength conversion member 10 includes: a phosphor layer 1 containing a glass matrix and inorganic phosphor powder dispersed in the glass matrix; a glass layer 2 disposed on a surface of the phosphor layer 1 and having a refractive index equal to or smaller than a refractive index of the inorganic phosphor powder; and a microscopically uneven layer 3 disposed on a surface of the glass layer 2 and having a refractive index equal to or smaller than the refractive index of the glass layer 2.
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