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:
Oct. 13, 1981
Filed:
May. 23, 1979
Sadakatsu Hashimoto, Nara, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A control circuit is adapted in connection with a driving circuit useful for an electro-optical device such as an electrochromic display device including an optical element, e.g., an electrochromic material of which coloration properties depend on surrounding temperature. The control circuit comprises a heat-sensitive element such as a thermister positioned adjacent to the electro-optical device for detecting the surrounding temperature, the element having a temperature coefficient varying on temperature, a circuit responsive to the heat-sensitive element for providing output signals, and the driving circuit responsive to the output signals from the circuit for controlling time intervals for which driving signals from the driving circuit are applied to the electro-optical device, whereby coloration shades of the optical element are approximately uniformed.