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:
Nov. 02, 2021
Filed:
Mar. 28, 2019
Applicant:
Seiko Epson Corporation, Tokyo, JP;
Inventor:
Takashi Kawaguchi, Shiojiri, JP;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02P 8/12 (2006.01); G04C 3/14 (2006.01); H02P 6/16 (2016.01); H02P 8/08 (2006.01); H02P 8/34 (2006.01); G04C 3/06 (2006.01);
U.S. Cl.
CPC ...
H02P 8/12 (2013.01); G04C 3/067 (2013.01); G04C 3/143 (2013.01); H02P 6/16 (2013.01); H02P 8/08 (2013.01); H02P 8/34 (2013.01);
Abstract
A movement includes a driver having ON and OFF states, and outputting a drive signal to a coil of a motor, a lower limit detector detecting that a current flowing through the coil is less than a lower limit, a drive controller bringing the driver into the ON state based on a result of the lower limit detector, and bringing the driver into the OFF state based on an elapsed time from the ON state, a polarity switcher switching a polarity of the drive signal when an elapsed time from the OFF state of the driver satisfies a switching condition, and a drive stopper stopping driving of the driver when the OFF time satisfies a stopping condition.