The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 17, 2020
Filed:
Oct. 04, 2017
Koha Co., Ltd., Tokyo, JP;
National Institute for Materials Science, Tsukuba, JP;
Makoto Watanabe, Tokyo, JP;
Daisuke Inomata, Tokyo, JP;
Kazuo Aoki, Tokyo, JP;
Kiyoshi Shimamura, Tsukuba, JP;
Encarnacion Antonia Garcia Villora, Tsukuba, JP;
KOHA CO., LTD., Tokyo, JP;
NATIONAL INSTITUTE FOR MATERIALS SCIENCE, Tsukuba, JP;
Abstract
A phosphor-containing member includes a transparent member, and a plurality of granular single crystal phosphors dispersed in the transparent member. Each of the plurality of granular single crystal phosphors includes a YAG crystal as a mother crystal. The plurality of granular single crystal phosphors are prepared by crushing the YAG crystal. The YAG crystal has a composition represented by a formula of YGdCeAlO(0.03≤x≤0.2, 0.003≤y≤0.2, −0.2≤w≤0.2). Reduction of fluorescence intensity of the phosphors is less than 3% when an excitation light wavelength is 460 nm and a temperature is increased from 25° C. to 100° C.