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, 2022
Filed:
Jul. 02, 2020
Applicant:
Seiko Epson Corporation, Tokyo, JP;
Inventors:
Reiko Nagahama, Shiojiri, JP;
Takashi Kawaguchi, Shiojiri, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P 8/02 (2006.01); H02P 8/12 (2006.01); H02P 8/16 (2006.01); G04C 3/14 (2006.01);
U.S. Cl.
CPC ...
H02P 8/02 (2013.01); G04C 3/143 (2013.01); H02P 8/12 (2013.01); H02P 8/16 (2013.01);
Abstract
An electronic watch includes a motor including a coil, a driver controlled to an ON state for supplying a driving current to the coil and an OFF state for not supplying the driving current, a driver controller configured to control the driver to the ON state or the OFF state depending on a value of a current flowing through the coil, and a polarity switcher configured to switch a polarity of the driving current when a prescribed condition is satisfied after detecting that an ON time, which is a duration of the ON state of the driver controller, reaches a maximum.