LIGHT-EMITTING APPARATUS - PANASONIC IP MAN CO LTD

Title:

LIGHT-EMITTING APPARATUS

Document Type and Number:

WIPO Patent Application WO/2019/124046

Kind Code:

A1

Abstract:

This light-emitting apparatus (100) is provided with: a first fluorescent material layer (1) including a first fluorescent material which is made of an inorganic fluorescent material activated by Ce3+; and a second fluorescent material layer (2) including a second fluorescent material which is made of an inorganic fluorescent material activated by Ce3+ and which is different from the first fluorescent material. The second fluorescent material layer is spaced apart from the first fluorescent material layer. The light-emitting apparatus is further provided with: an optical filter (3) disposed between the first fluorescent material layer and the second fluorescent material layer; and an excitation source (6) for emitting light that excites at least one among the first fluorescent material and the second fluorescent material. The second fluorescent material has light absorption characteristics absorbing at least part of the first fluorescence (41) emitted by the first fluorescent material. The optical filter reflects at least part of the first fluorescence emitted by the first fluorescent material, and transmits second fluorescence (42) emitted by the second fluorescent material.

Inventors:

OSHIO SHOZO
ABE TAKESHI

Application Number:

PCT/JP2018/044494

Publication Date:

June 27, 2019

Filing Date:

December 04, 2018

Export Citation:

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Assignee:

PANASONIC IP MAN CO LTD (JP)

International Classes:

G02B5/20; C09K11/79; C09K11/80; F21S2/00; F21V7/26; F21V9/30; G02B5/26; H01L33/50; H01S5/0239; F21Y115/30

Domestic Patent References:

WO2017154830A1

2017-09-14

Foreign References:

JP2007273975A	2007-10-18
JP6206696B1	2017-10-04
JP2017017317A	2017-01-19
JP6163754B2	2017-07-19
JP2017241754A	2017-12-18

Other References: