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:
Jun. 03, 2003
Filed:
Apr. 23, 2001
Futuba Corporation, Chiba-ken, JP;
Abstract
A phosphor capable of preventing a deterioration in luminous characteristics thereof, particularly, high-temperature operation characteristics thereof due to a SiO -containing pigment added thereto. The phosphor has a pigment contained therein, wherein the pigment has SiO added thereto and is melted, to thereby be coated with sodium glass. This permits gas generated during operation of the phosphor to be adsorbed on the phosphor as compared with a conventional phosphor to which the pigment subjected to the above-described treatment is not added, resulting in luminance retention of the phosphor after operation thereof being increased. In particular, it permits characteristics of the non-driven phosphor after the high-temperature operation test to be enhanced.