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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:
JP2018/044494
Publication Date:
June 27, 2019
Filing Date:
December 04, 2018
Export Citation:
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Assignee:
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD. (1-61, Shiromi 2-chome Chuo-ku, Osaka-sh, Osaka 07, 〒5406207, JP)
International Classes:
G02B5/20; C09K11/79; C09K11/80; F21S2/00; F21V7/26; F21V9/30; G02B5/26; H01L33/50; H01S5/022; F21Y115/30
Domestic Patent References:
WO2017154830A12017-09-14
Foreign References:
JP2007273975A2007-10-18
JP6206696B12017-10-04
JP2017017317A2017-01-19
Attorney, Agent or Firm:
ITO Masakazu et al. (Toranomon Kotohira Tower 2-8, Toranomon 1-chome, Minato-k, Tokyo 01, 〒1050001, JP)
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