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. 28, 2004
Filed:
Jun. 17, 2003
Minoru Hiwatari, Miyagi-ken, JP;
Alps Electric Co., Ltd., Tokyo, JP;
Abstract
A motor driving circuit includes a window opening switch, a window closing switch, an auto switch, a motor which opens and closes a window by driving rotating operation, a charging circuit which charges one capacitance element by a first CR time constant upon operating the window opening switch, and a discharging circuit which sharply charges another capacitance element upon operating the auto switch and which discharges a discharging voltage charged to the other capacitance element by a second CR time constant upon stopping operation of the auto switch. Driving operation of the motor stops when a voltage of the one capacitance element in the charging circuit is higher than a first reference voltage or a voltage of the other capacitance element in the discharging circuit is lower than a second reference voltage during driving the motor.