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. 01, 2008
Filed:
Feb. 01, 2005
Atsushi Yamazaki, Shizuoka, JP;
Atsushi Yamazaki, Shizuoka, JP;
Koito Manufacturing Co., Ltd., Tokyo, JP;
Abstract
In an automatic leveling apparatus, a motor inclines an optical axis of a headlamp in an up and down direction relative to a vehicle body, a vehicle height sensor detects a change in a height direction of an axle portion of a front wheel or a rear wheel of a vehicle, and an involatile memory records a control constant inherent to the vehicle. CPU determines whether the control constant is recorded to the involatile memory, calculates a pitch angle based on the control constant inherent to the vehicle and a detecting output of the vehicle height sensor, and controls to drive the motor by generating a control signal for canceling the pitch angle. CPU calculates the pitch angle on a condition that the control constant is recorded to the involatile memory, outputs the control signal and stops to output the control signal to the motor otherwise.