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. 02, 2002
Filed:
Sep. 13, 2000
Mitsuyoshi Nagao, Shizuoka, JP;
Hidenori Sato, Shizuoka, JP;
Murakami Corporation, Shizuoka, JP;
Abstract
A back mirror comprising an automatic glare-proof function of the present invention includes a battery E , a daytime/nighttime deciding circuit for deciding whether the current time is daytime or nighttime, an integrating circuit , an electronic switch FET , a glare-proof/glare-non-proof deciding circuit for deciding whether an EC mirror is set to a glare-proof state or a glare-non-proof state, and a driving circuit for applying a DC voltage to the EC mirror . The daytime/nighttime deciding circuit is being constantly applied with a DC voltage from the battery E . When the daytime/nighttime deciding circuit has decided that the current time is daytime, the electronic switch FET is turned off, and when the daytime/nighttime deciding circuit has decided that the current time is nighttime, the electronic switch FET is turned on. Therefore, the voltage is applied to the glare-proof/glare-non-proof deciding circuit and the driving circuit only when a decision has been made that the current time is nighttime. Thereby, the power consumption of the battery E can be decreased.