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:
Aug. 18, 2015
Filed:
Oct. 28, 2011
Kazuo Aoki, Tokyo, JP;
Makoto Watanabe, Tokyo, JP;
Kiyoshi Shimamura, Tsukuba, JP;
Villora Encarnacion Antonia Garcia, Tsukuba, JP;
Kazuo Aoki, Tokyo, JP;
Makoto Watanabe, Tokyo, JP;
Kiyoshi Shimamura, Tsukuba, JP;
Villora Encarnacion Antonia Garcia, Tsukuba, JP;
NATIONAL INSTITUTE FOR MATERIALS SCIENCE, Tsukuba-Shi, Ibaraki, JP;
Abstract
[Problem] To provide a light-emitting device which does not undergo the deterioration in luminous efficiency associated with the long-term use. [Solution] A light-emitting device () comprises a light-emitting element () which can emit blue light and a phosphor () which is composed of a single kind of single crystal and can emit yellow light upon the irradiation with the light emitted from the light-emitting element () which serves as excitation light. Thus, it becomes possible to prevent the deterioration in luminous efficiency associated with the deterioration in a binder or the like compared with a light-emitting device which utilizes multiple kinds of granular phosphors, because any binder for binding phosphors to each other is not required in the light-emitting device ().