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:
Jun. 05, 2001
Filed:
Nov. 29, 1999
Akiyoshi Kobayashi, Hamamatsu, JP;
Mitsuyoshi Nagao, Fujieda, JP;
Murakami Corporation, Shizuoka, JP;
Abstract
In a device for diving an EC dimming mirror, an oscillation circuit generates pulse signals which change in the duty factor in accordance with quantity of surrounding light and quantity of rear light. An integration circuit integrates these pulse signals and outputs DC voltage corresponding to the duty factor. The DC voltage produced by the integration circuit is subjected to a processing for shifting a sensitivity curve in parallel by a voltage operation circuit, is limited in upper and lower limit values by a voltage limiting circuit and then is applied to an EC element through a drive circuit (,) to control the amount of coloration of the EC element.