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:
Jul. 03, 2007
Filed:
Dec. 28, 2004
Chen-wen Fan, Sayre, PA (US);
Thomas M. Snyder, Laceyville, PA (US);
Eric A. Thomason, Towanda, PA (US);
Chen-Wen Fan, Sayre, PA (US);
Thomas M. Snyder, Laceyville, PA (US);
Eric A. Thomason, Towanda, PA (US);
Osram Sylvania Inc., Danvers, MA (US);
Abstract
The present invention is a single-component, UV-emitting phosphor having a composition represented by the general formula (YLaGdCe)POwhere x has a value in a range from 0.001 to 0.98, y has a value in a range from 0 and 0.1, z has a value in a range from 0.01 and 0.2, and x+y+z<1. The phosphor when stimulated by 254 nm radiation emits in both the UVA and UVB regions. The relative balance of the UVA and UVB emissions may be varied by adjusting the relative amounts of Y and La. Brightness can be increased by adding Gd to the composition.