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:
Nov. 13, 1984
Filed:
Nov. 05, 1981
Applicant:
Inventors:
Eigo Hashimoto, Sakado, JP;
Takanori Nanya, Sayama, JP;
Assignee:
Citizen Watch Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02F / ;
U.S. Cl.
CPC ...
350357 ;
Abstract
A solid state complementary electrochromic display device in which a first electrochromic material layer which permits an oxidation-reduction reaction and is colored in a reduction state, an ion permeable insulating layer, a second electrochromic material layer which permits an oxidation-reduction reaction and is colored in an oxidation state are prepared between two electrodes and the first electrochromic material layer and the second electrochromic material layer are colored or bleached simultaneously. The ion permeable insulating layer comprises a halogenide. As a result, high coloration concentration can be obtained at a low potential.