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:
Nov. 23, 2004
Filed:
Apr. 19, 2002
Applicant:
Inventors:
Yoshihiko Yano, Tokyo, JP;
Tomoyuki Oike, Tokyo, JP;
Assignee:
TDK Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
B32B 1/900 ; B32B 9/00 ; H01L 2/924 ; H01J 1/62 ; H01J 6/304 ;
U.S. Cl.
CPC ...
B32B 1/900 ; B32B 9/00 ; H01L 2/924 ; H01J 1/62 ; H01J 6/304 ;
Abstract
The invention provides a phosphor thin film having a high luminance, a satisfactory color purity enough to eliminate a need for filters, and a long luminance life, and best suited for each element of RGB in full color EL panels. The phosphor thin film of the invention comprises a matrix material and a luminescent center. The matrix material is an oxysulfide containing at least an alkaline earth element, Ga and/or In, sulfur (S) and oxygen (O). In the matrix material, the atomic ratio of oxygen to the total of oxygen and sulfur, O/(S+O), is from 0.1 to 0.85.