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:
Feb. 19, 1991
Filed:
Jan. 29, 1990
Applicant:
Inventors:
Jun Kuwata, Katano, JP;
Atsushi Abe, Ikoma, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S / ;
U.S. Cl.
CPC ...
372-7 ; 372 39 ; 372 45 ; 313503 ;
Abstract
An electroluminescence apparatus in which voltage is applied to a lamination of a fluorescent material layer and a dielectric layer through a pair of electrodes one of which is light-transmissible to extract fluorescence. A reflecting mirror layer is provided on the lamination while a particular relationship is established between the refractive index and the thickness of the lamination, thereby improving the efficiency with which the fluorescence is extracted.