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. 24, 1981
Filed:
Aug. 19, 1977
Applicant:
Inventors:
Hiroshi Nakauchi, Nara, JP;
Yasuhiko Inami, Tenri, JP;
Hisashi Uede, Wakayama, JP;
Tomio Wada, Nara, JP;
Assignee:
Sharp Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G08B / ;
U.S. Cl.
CPC ...
340763 ; 307297 ; 340785 ; 340813 ; 350357 ;
Abstract
A constant-voltage circuit is interposed between a power source and a driver circuit for an electrochromic display. The constant-voltage circuit functions to compensate for variations of an output level of the power source in order to stabilize coloration and bleaching operations. Switching means are interposed between the power source and the constant-voltage circuit for placing the constant-voltage circuit in an operative condition only when the coloration operation or the bleaching operation is conducted.