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, 2015
Filed:
Sep. 11, 2012
Naotoshi Matsuda, Chigasaki, JP;
Yumi Fukuda, Tokyo, JP;
Keiko Albessard, Yokohama, JP;
Masahiro Kato, Kanagawa-ken, JP;
Iwao Mitsuishi, Tokyo, JP;
Naotoshi Matsuda, Chigasaki, JP;
Yumi Fukuda, Tokyo, JP;
Keiko Albessard, Yokohama, JP;
Masahiro Kato, Kanagawa-ken, JP;
Iwao Mitsuishi, Tokyo, JP;
KABUSHIKI KAISHA TOSHIBA, Tokyo, JP;
Abstract
The present embodiments provide a europium-activated oxynitride phosphor and a production method thereof. This phosphor emits red luminescence having a peak at 630 nm or longer and can be produced by use of inexpensive oxides as raw materials containing alkaline earth metals such as strontium. The oxynitride phosphor is activated by a divalent europium and represented by the formula (1):(MEu)AlSiONC  (1). In the formula, M is an alkaline earth metal, and x, a, b, c, d and e are numbers satisfying the conditions of 0<x<0.2, 1.3≦a≦1.8, 3.5≦b≦4, 0.1≦c≦0.3, 6.7≦d≦7.2 and 0.01≦e≦0.1, respectively.