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:
Sep. 17, 2002
Filed:
Jun. 12, 2001
Atsushi Toda, Shizuoka, JP;
Hideaki Takeuchi, Shizuoka, JP;
Koito Manufacturing Co., Ltd., Tokyo, JP;
Abstract
A head lamp auto-leveling system can be used inexpensively and for a long term by reducing the frequency in the drive of actuators, and which does not arouse an unpleasant feeling in the driver. An implementation of the auto-leveling system includes head lamps whose optical axis L is tilted vertically with respect to a vehicle body by a drive of an actuator , a control portion for controlling the drive of actuators , a speed sensor , a height sensor , and a memory portion for storing pitch angle data detected by the height sensor . The control portion controls the actuators based on the detected pitch angle data such that optical axes L are brought into a predetermined tilted state with respect to a road surface. The control portion also decides a stable vehicle posture to control (level) the drive of the actuators during both stop and running states if the difference between a plurality of moving average pitch angle data (e.g., 1-second average and 3-second average) exceeds a reference value &thgr;a once, and then a state below the reference value &thgr;a is continued for a predetermined time.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile