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:
Dec. 11, 2001
Filed:
Oct. 27, 1999
Tetsuya Yamamoto, Iwata, JP;
Mitsuyoshi Nagao, Fujieda, JP;
Hidenori Sato, Fujieda, JP;
Yoshihiro Fujikawa, Toyota, JP;
Murakami Corporation, Shizuoka, JP;
Abstract
An EC panel drive unit for a rear-view mirror comprising a timer circuit,in which a drive signal is output for a fixed period of time when either a colored state switch SW,or a colorless state switch SW,is in the ON position; a D-type flip-flop circuit,that sends different output signals, depending on whether the colored state switch SW,is in the ON position or the colorless state switch SW,is in the ON position, and a colored/colorless state switching circuit,which switches the polarity of DC voltage that is output from a lithium battery based on the output from the D-type flip-flop circuit,and then applies the voltage to input terminals Ta and Tb of the EC panel,A contact SW,-,is installed between the two input terminals, Ta and Tb, of the EC panel,for providing a short circuit between the two terminals when the colorless state switch SW,is turned to the ON position. Switching between a colored state and a colorless state by a one-touch operation, and returning the EC panel,to the colorless state from the colored state by pressing and holding the colorless state switch SW,in cases where trouble occurs such as a drop in output voltage from the lithium battery,so as to set the contact SW,-,to a short-circuit state can be achieved.