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. 15, 2002
Filed:
Aug. 18, 2000
Atsushi Toda, Shizuoka, JP;
Hideaki Takeuchi, Shizuoka, JP;
Koito Manufacturing Co., Ltd., Tokyo, JP;
Abstract
A device for aligning an optical axis of a light source according to the change of attitude of a vehicle is described. The device is of simple construction and is positionally accurate. In an embodiment, a controller performs an alignment operation according to an output signal from a vehicle height sensor and an alignment command signal (PWM signal). The PWM signal has a pulse duration that has been modulated according to this operation, and the result is input to a D/A converter A transistor Q of a D/A converter responds to the PWM signal and performs a switching operation, and a signal accompanying this switching operation is smoothed by a charge and discharge circuit comprising resistance R and R and a condenser C. The smoothed signal is output from both ends of the condenser C to an actuator and a motor is driven to rotate according to the deviation between the output of a potentiometer and the voltages at both ends of the condenser C.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile