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:
Feb. 27, 2007
Filed:
May. 15, 2003
Masaki Aoki, Osaka, JP;
Hiroyuki Kawamura, Osaka, JP;
Kazuhiko Sugimoto, Kyoto, JP;
Mitsuhiro Otani, Osaka, JP;
Hiroshi Setoguchi, Osaka, JP;
Junichi Hibino, Osaka, JP;
Masaki Aoki, Osaka, JP;
Hiroyuki Kawamura, Osaka, JP;
Kazuhiko Sugimoto, Kyoto, JP;
Mitsuhiro Otani, Osaka, JP;
Hiroshi Setoguchi, Osaka, JP;
Junichi Hibino, Osaka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A plasma display device comprises blue phosphor which restricts adsorption of water and hydrocarbon gases to a surface thereof, reduces degradation of luminance and chromaticity change, and improves discharge characteristic. Among phosphor layers used for a plasma display, a blue phosphor layer comprises one of compounds symbolized by BaMgAlO:Euand BaSrMgAlO:Eu, of which phosphor contains 0.2 to 0.8 in number x of Eu atoms, and the Eu atoms comprises 25% to 85% concentration of bivalent Eu ions, and 15% to 75% concentration of trivalent Eu ions.