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. 15, 2009
Filed:
Oct. 23, 2007
Kazuhiko Sato, Kasugai, JP;
Hirohito Miyazaki, Gifu, JP;
Izumi Yamada, Kasugai, JP;
Akihiro Kakamu, Nagoya, JP;
Masaru Ishizaki, Wako, JP;
Kazuhiko Sato, Kasugai, JP;
Hirohito Miyazaki, Gifu, JP;
Izumi Yamada, Kasugai, JP;
Akihiro Kakamu, Nagoya, JP;
Masaru Ishizaki, Wako, JP;
OMRON Corporation, Kyoto, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
In a headlamp luminance controlling device, a CPUfirst decides a luminance factor D based on a state of each switchto switchand a signal from a sensor. The CPUdetermines an initial value of a PWM duty ratio S from the luminance factor D with a load current Ap as a default value (rated current A). The CPUstarts the initial driving of a headlamp HL using the duty ratio S. The CPUthen determines the luminance factor D based on the state of each switchto switchand the signal from the sensor. Next, the CPUdetermines the PWM duty ratio S based on the luminance factor D and the load current Ap detected by the headlamp current detector. The CPUdrives the headlamp HL using the PWM duty ratio S.