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. 11, 2006
Filed:
Mar. 24, 2005
Hitoshi Yamazaki, Saitama, JP;
Takeshi Nishimura, Saitama, JP;
Akira Yasaki, Saitama, JP;
Hideki Kinoshita, Saitama, JP;
Shigeru Kojima, Saitama, JP;
Jun Togashi, Saitama, JP;
Hitoshi Yamazaki, Saitama, JP;
Takeshi Nishimura, Saitama, JP;
Akira Yasaki, Saitama, JP;
Hideki Kinoshita, Saitama, JP;
Shigeru Kojima, Saitama, JP;
Jun Togashi, Saitama, JP;
Pioneer Corporation, Tokyo, JP;
Abstract
A stepping motor driving system includes: a stepping motor that rotates at a predetermined angle according to a driving pulse signal, a vibration detector that detects vibration to output a vibration signal, and a stepping motor control unit that controls the driving pulse signal, which is applied to the stepping motor, to rotate the stepping motor at the predetermined angle. The driving pulse signal includes a start-up current which is required for rotating the stepping motor at a unit angle and a holding current which maintains a rotational angle of the stepping motor rotated by the start-up current. The stepping motor control unit changes the level of the holding current according to the vibration signal which is outputted from the vibration detector.