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. 05, 2011
Filed:
Dec. 11, 2008
Hiroo Yabe, Susono, JP;
Tsuyoshi Uchikura, Kosai, JP;
Tatsumi Tashiro, Toyota, JP;
Akihiro Tanaka, Toyota, JP;
Masahiro Kasai, Toyota, JP;
Hiroo Yabe, Susono, JP;
Tsuyoshi Uchikura, Kosai, JP;
Tatsumi Tashiro, Toyota, JP;
Akihiro Tanaka, Toyota, JP;
Masahiro Kasai, Toyota, JP;
Yazaki Corporation, Tokyo, JP;
Toyota Jidosha Kabushiki Kaisha, Aichi-ken, JP;
Abstract
A load controller includes: a first input circuit which detects that a drive instruction signal by an operation of a drive instructing unit is less or equal to a first input threshold value; a first constant current source activated in accordance with the detection; a PWM signal supply unit that is activated by the first constant current source and supplies a PWM signal having a prescribed frequency and a duty ratio; a constant control signal supply unit that supplies a constant control signal during failure of the first input circuit or the first constant current source; a drive control unit that generates a PWM drive control signal in accordance with the PWM signal and generates a constant drive control signal in accordance with the constant control signal; and a load driving element that is controlled by the PWM drive or constant drive control signal to drive a load.