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:
May. 20, 2008
Filed:
Nov. 12, 2004
Hisashi Yoshida, Shinagawa-ku, JP;
Ryo Yoshimatsu, Shinagawa-ku, JP;
Hisashi Yoshida, Shinagawa-ku, JP;
Ryo Yoshimatsu, Shinagawa-ku, JP;
NEC Corporation, Tokyo, JP;
Abstract
This invention is intended to overcome the problems with conventional phosphor materials, specifically to overcome the problems of insufficient luminance and of color impurity on the screens of color display units when green phosphor materials have blue or red light emission. This invention is intended to provide vacuum ultraviolet excited green phosphor materials that include terbium, gadolinium-doped rare-earth aluminum scandium borate represented by the following general formula: (YGdTb)AlSc(BO)(0≦x≦0.5, 0<y<0.5, 0<z≦3). The phosphor materials of this invention can be used for light-emitting devices. Using the phosphor materials in combination with blue phosphor materials and red phosphor materials enables the formation of white emitting device.