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:
Jul. 10, 1984
Filed:
Dec. 10, 1982
Takanori Nanya, Sayama, JP;
Eigo Hashimoto, Sakado, JP;
Citizen Watch Co., Ltd., Tokyo, JP;
Abstract
EC display device suitable for drive by means of a charge transfer method which is one of the methods for realizing a constant charge drive, in which all the members comprise solid materials only and a reduction coloration type EC material and an oxidation coloration type EC material are combined. The device has means for applying a voltage between each of the EC segments, with the counter electrode shut off, and a fixed quantity of electric charge is transferred from one EC segment to another. The counter EC layer provided on the counter electrode functions as a donnor or an acceptor of protons so as to activate the EC reactions and this counter layer is colored or bleached by itself, producing double contrast of the display.