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. 13, 2004
Filed:
May. 30, 2001
Applicant:
Inventors:
Yoshihiko Yano, Tokyo, JP;
Katsuto Nagano, Tokyo, JP;
Assignee:
TDK Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C09K 1/108 ; H01J 6/304 ;
U.S. Cl.
CPC ...
C09K 1/108 ; H01J 6/304 ;
Abstract
The invention aims to provide a phosphor multilayer eliminating a need for filters, having a satisfactory color purity and useful in white monochromatic EL devices, and an EL panel. Such objects are achieved by a phosphor multilayer comprising at least a first thin film and a second thin film wherein the first thin film is formed of a matrix material comprising barium aluminate as a main component, containing sulfur element and further containing Eu as a luminescent center, and the second thin film is formed of a matrix material comprising zinc sulfide as a main component, and an EL panel using the same.