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:
Mar. 21, 1989
Filed:
Dec. 23, 1987
Takao Tohda, Ikoma, JP;
Tomizo Matsuoka, Neyagawa, JP;
Yosuke Fujita, Ashiya, JP;
Atsushi Abe, Ikoma, JP;
Tsuneharu Nitta, Katano, JP;
Matsushita Electric Industrial Co., Ltd., Kadoma, JP;
Abstract
An electroluminescent display device comprising an electroluminescent emitting layer including zinc oxide containing a luminescent active material, an insulating layer formed on one surface of the electroluminescent emitting layer and a pair of energizing means for applying signal voltages corresponding to an information to be displayed to a multilayer assembly including the said two layers, characterized in that a plurality of semiconductor layers each containing at least one chemical compound selected from the group consisting of chemical compounds of the II-VI groups and tin oxide are arranged as one of the energizing means arranged on the side of the electroluminescent emitting layer or between the energizing means arranged on the side of the electroluminescent emitting layer and the electroluminescent emitting layer. This device features that it requires only a reduced drive voltage for image displaying purposes and ensures an increased luminescent brightness.