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1. (WO2017154413) LIGHT-EMITTING DEVICE

Pub. No.:    WO/2017/154413    International Application No.:    PCT/JP2017/003348
Publication Date: Fri Sep 15 01:59:59 CEST 2017 International Filing Date: Wed Feb 01 00:59:59 CET 2017
IPC: G02B 5/20
C09K 11/08
F21S 2/00
F21V 9/16
H01L 33/50
H01S 5/022
F21Y 115/10
F21Y 115/30
Applicants: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
パナソニックIPマネジメント株式会社
Inventors: LEE Youshin
李 柔信
OSHIO Shozo
大塩 祥三
OKUNO Tatsuya
奥野 達也
ABE Takeshi
阿部 岳志
NAKAMURA Masahiro
中村 将啓
Title: LIGHT-EMITTING DEVICE
Abstract:
A light-emitting device 1 according to the present invention comprises a substrate 30 and a phosphor layer 40 wherein many phosphor particles 60 are adhered to a flat surface 32 of the substrate 30. At least one of the phosphor particles 60 is a monodispersed phosphor particle 65 having a polyhedral shape which is derived from the structure of a garnet crystal and contains facets. A median grain diameter D50 of the polyhedral phosphor particle 65 is greater than or equal to 30 μm and smaller than or equal to the maximum thickness of the phosphor layer 40. At least one of the phosphor particles 60 adhered to the flat surface 32 of the substrate 30 is preferably the monodispersed, phosphor particle 65 having the polyhedral shape which is derived from the structure of the garnet crystal and contains the facets.