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. 18, 2012
Filed:
Dec. 15, 2009
Saburo Manaka, Chiba, JP;
Akira Takakura, Chiba, JP;
Kenji Ogasawara, Chiba, JP;
Kazumi Sakumoto, Chiba, JP;
Kazuo Kato, Chiba, JP;
Keishi Honmura, Chiba, JP;
Takanori Hasegawa, Chiba, JP;
Kosuke Yamamoto, Chiba, JP;
Hiroshi Shimizu, Chiba, JP;
Saburo Manaka, Chiba, JP;
Akira Takakura, Chiba, JP;
Kenji Ogasawara, Chiba, JP;
Kazumi Sakumoto, Chiba, JP;
Kazuo Kato, Chiba, JP;
Keishi Honmura, Chiba, JP;
Takanori Hasegawa, Chiba, JP;
Kosuke Yamamoto, Chiba, JP;
Hiroshi Shimizu, Chiba, JP;
Seiko Instruments Inc., , JP;
Abstract
When a stepping motor is driven to rotate by a main driving pulse, if an induced signal exceeding a reference threshold voltage is detected only in a third segment, a pulse down operation is performed, and the main driving pulse is not changed when the same is detected in at least a first and the third segments. When it is detected only in a second and the third segments, a rank-up is performed without performing the driving by a correction drive pulse and, when it is not detected in at least the third segment, the rank up operation is performed after the driving by the correction driving pulse.