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:
Apr. 17, 1979
Filed:
Jul. 01, 1976
Minoru Natori, Tokyo, JP;
Toshikazu Hatuse, Tanashi, JP;
Kouhei Kawanobe, Kawagoe, JP;
Hiroshi Ogawa, Tokorozawa, JP;
Fukuo Sekiya, Tokorozawa, JP;
Katsuo Nishimura, Tokorozawa, JP;
Citizen Watch Co., Ltd., Tokyo, JP;
Abstract
A driver circuit for an electrochromic display device which includes segment electrodes and a common electrode. The driver circuit has a power source, switching means connected between the power source and the segment electrodes, and circuit means disposed between the common electrode and the power source. The circuit means is operative to couple the common electrode to either a positive terminal or a negative terminal of the power source, whereby an electric current will flow through the segment electrodes in bleaching and coloring directions with the use of a single power source.