Invention Grant
- Patent Title: Light-emitting apparatus
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Application No.: US15206273Application Date: 2016-07-10
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Publication No.: US10359155B2Publication Date: 2019-07-23
- Inventor: Taku Hirasawa , Yasuhisa Inada , Akira Hashiya , Nobuaki Nagao , Akira Tsujimoto
- 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: JP2015-162403 20150820; JP2015-162404 20150820; JP2015-162405 20150820; JP2015-163042 20150820; JP2015-163680 20150821; JP2015-163681 20150821; JP2016-070837 20160331
- Main IPC: F21V9/30
- IPC: F21V9/30 ; F21K9/64 ; H01S5/00 ; F21V5/04 ; F21Y115/10 ; F21Y115/30

Abstract:
A light-emitting apparatus includes an excitation light source that emits first light; a light-emitting device on an optical path of the first light, the light-emitting device emitting second light having a wavelength in air; and a first converging lens on an optical path of the second light. The light-emitting device comprises: a photoluminescent layer that emits the second light by being excited by the first light; and a light-transmissive layer on the photoluminescent layer. At least one of the photoluminescent layer and the light-transmissive layer has a surface structure comprising projections or recesses arranged perpendicular to a thickness direction of the photoluminescent layer. At least one of the photoluminescent layer and the light-transmissive layer has a light emitting surface perpendicular to the thickness direction, the second light emitted from the light emitting surface. The surface structure limits the directional angle of the second light emittied from the light emitting surface.
Public/Granted literature
- US20170051885A1 LIGHT-EMITTING APPARATUS Public/Granted day:2017-02-23
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