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:
Jan. 04, 1983
Filed:
Jul. 08, 1980
Applicant:
Inventor:
Sadakatsu Hashimoto, Nara, JP;
Assignee:
Sharp Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G09G / ;
U.S. Cl.
CPC ...
340785 ; 340813 ; 350357 ;
Abstract
A drive system is provided for driving an electrochromic display cell including an electrochromic material, a predetermined number of display electrodes, and a counter electrode confronting them, different combination of the display electrodes defining different desired display patterns. The drive system comprises a coloration circuit and a bleaching circuit driven at the same time. The coloration circuit is adapted for conducting coloration operations by applying a coloration voltage to selected ones of the display electrodes. The bleaching circuit is adapted for conducting bleaching operations by applying a bleaching voltage to the remaining display electrodes.