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:
Oct. 30, 1990
Filed:
Aug. 10, 1989
Applicant:
Inventors:
Assignee:
Sharp Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ; H01L / ;
U.S. Cl.
CPC ...
357 30 ; 357-6 ; 428690 ; 428917 ; 313509 ;
Abstract
A thin film electroluminescent(EL) device includes a luminescent layer, both sides of which are covered with insulating layers, and at least one pair of electrodes sandwiching the luminescent layer through the insulating layers. The luminescent layer is composed of zinc sulfide in which Gd and a luminously effective amount of a rare earth element, acting as luminescent center, are doped at a total amount of 1-4 atomic percent.