Invention Grant
- Patent Title: Wavelength conversion member including phosphor that converts light from semiconductor light-emitting element into longer-wavelength light
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Application No.: US15468183Application Date: 2017-03-24
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Publication No.: US10094529B2Publication Date: 2018-10-09
- Inventor: Yoshihisa Nagasaki , Takahiro Hamada , Kazuma Mima , Yukihiko Sugio
- Applicant: Panasonic Intellectual Property Management Co., Ltd.
- Applicant Address: JP Osaka
- Assignee: Panasonic Intellectual Property Management Co., Ltd.
- Current Assignee: Panasonic Intellectual Property Management Co., Ltd.
- Current Assignee Address: JP Osaka
- Agency: McDermott Will & Emery LLP
- Priority: JP2016-084523 20160420
- Main IPC: F21S41/16
- IPC: F21S41/16 ; F21S8/10 ; F21S41/14 ; B60Q1/04 ; C09K11/02 ; C09K11/77 ; H01L33/00 ; H01L33/32 ; C09K11/62 ; H01L33/50 ; H01S5/00 ; F21S41/25 ; F21S45/47

Abstract:
A wavelength conversion member, comprises: a substrate; a first wavelength conversion layer on the substrate, the first wavelength conversion layer containing a first phosphor and a first matrix; and a second wavelength conversion layer containing a second phosphor, first inorganic particles, and a second matrix. The first phosphor and the second phosphor convert at least part of the excitation light incident on the second main surface into first light having longer wavelengths than the excitation light. The first light is emitted from the second main surface of the second wavelength conversion layer. A volume Vp1 of the first phosphor, a volume Vw1 of the first wavelength conversion layer, a volume Vp2 of the second phosphor, and a volume Vw2 of the second wavelength conversion layer satisfy Vp1/Vw1>Vp2/Vw2.
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