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:
Jan. 23, 2007
Filed:
Apr. 01, 2004
Kazuki Takahashi, Shizuoka, JP;
Kazuki Takahashi, Shizuoka, JP;
Koito Manufacturing Co., Ltd., Tokyo, JP;
Abstract
A headlamp apparatus for a vehicle accurately detects a straight steering position in a steering device of the vehicle, thereby controlling a light distribution characteristic of a headlamp of the vehicle. In a headlamp apparatus for a vehicle including a controller for controlling a light distribution of a headlamp based on a steering angle of a steering device of the vehicle, the controller detects a straight steering position based on an origin position signal obtained when each of wheel speeds SPDL and SPDR of left and right wheels (front wheelsLF andRF) of the vehicle is at least a reference value α and a difference in the speed is equal to or lower than a reference value β on the basis of an origin position signal PZ to be output from the steering device for each rotation of a steering wheel and the difference in the speed.