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. 31, 2005
Filed:
Mar. 20, 2003
Kouhei Matsuda, Kanagawa, JP;
Takayuki Hisamune, Kanagawa, JP;
Kouhei Matsuda, Kanagawa, JP;
Takayuki Hisamune, Kanagawa, JP;
Kasei Optonix, Ltd., Odawara, JP;
Abstract
A blue-emitting bivalent metal silicate phosphor improved in the luminance efficiency, the durability against deterioration by VUV and the powder characteristic, and a process for its production, a phosphor paste composition employing such an improved phosphor, and a VUV excitation type light-emitting device having high luminance. The phosphor is an Eu-activated bivalent metal silicate phosphor represented by the compositional formula CaMgSiO:Eu, wherein a specific amount of at least one member among La, Ba, Sr, Zn, Y, Ce, In, Bi, chlorine, bromine and iodine, is contained in the crystalline matrix.