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:
Aug. 29, 1989
Filed:
Aug. 17, 1987
Applicant:
Inventors:
Masahito Migita, Hachioji, JP;
Osam Kanehisa, Kodaira, JP;
Masatoshi Shiiki, Kokubunji, JP;
Hajime Yamamoto, Tokyo, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B / ;
U.S. Cl.
CPC ...
313502 ; 313509 ; 428690 ;
Abstract
A multi-color single layer electroluminescent display apparatus comprising a illuminant layer having been interposed between a pair of electrode layers and having a plurality of activators doped at spatially different locations is disclosed. A process for producing an electroluminescent display apparatus comprising doping with a plurality of activators at spatially different locations on forming a illuminant layer is also disclosed.