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:
Apr. 02, 2013
Filed:
Mar. 25, 2008
Kojiro Okuyama, Nara, JP;
Yayoi Kitamura, Osaka, JP;
Seigo Shiraishi, Osaka, JP;
Kazuhiko Sugimoto, Osaka, JP;
Mituru Harada, Osaka, JP;
Kojiro Okuyama, Nara, JP;
Yayoi Kitamura, Osaka, JP;
Seigo Shiraishi, Osaka, JP;
Kazuhiko Sugimoto, Osaka, JP;
Mituru Harada, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
The present invention provides a blue phosphor having high luminance and showing less luminance degradation during driving of a light-emitting device. The present invention is a blue phosphor that includes: an alkaline earth metal aluminate represented by a general formula aBaO.bSrO.(1−a−b)EuO.cMgO.dAlO, where 0.70≦a≦0.95, 0≦b≦0.15, 0.95≦c≦1.15, 9.00≦d≦11.00, and a+b≦0.97 are satisfied; and 0.008 mol to 0.800 mol of MWOwith respect to 1 mol of the aluminate, where M is at least one element selected from a group consisting of Ba, Sr, and Ca.