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:
Dec. 25, 2018
Filed:
Jun. 15, 2016
Applicant:
Dyden Corporation, Fukuoka, JP;
Inventor:
Chengzhou Li, Saga, JP;
Assignee:
DYDEN CORPORATION, Fukuoka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K 11/76 (2006.01); C09K 11/71 (2006.01); C09K 11/08 (2006.01); C09K 11/59 (2006.01); C09K 11/64 (2006.01); C09K 11/73 (2006.01); H01L 33/50 (2010.01);
U.S. Cl.
CPC ...
C09K 11/71 (2013.01); C09K 11/08 (2013.01); C09K 11/59 (2013.01); C09K 11/64 (2013.01); C09K 11/73 (2013.01); H01L 33/50 (2013.01);
Abstract
An object of the invention is to provide a blue-green light-emitting phosphor having excellent high-temperature property and excellent light-emitting properties such as brightness and half width. The phosphor is constituted of a plurality of alkaline earth metal elements including a barium element, phosphoric acid and a halogen element, and Eu as an activator, in which the molar ratio of the barium element to the total content of the alkaline earth metal elements is larger than 60% and smaller than 95%, and upon irradiation with a near-ultraviolet ray, the blue-green light-emitting phosphor is excited to thereby emit blue-green visible light.