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:
Aug. 30, 2022
Filed:
Mar. 06, 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 8/28 (2006.01); H02P 6/15 (2016.01); G04C 3/14 (2006.01);
U.S. Cl.
CPC ...
G04C 3/143 (2013.01); H02P 8/02 (2013.01); H02P 8/12 (2013.01); H02P 8/28 (2013.01);
Abstract
An electronic timepiece enables driving by appropriate drive conditions even when the load on a motor changes. The electronic timepiece includes a motor having a coil; a driver that is controlled to an on state supplying drive current to the coil, and an off state not supplying the drive current; a driver controller configured to control the driver to the on state or the off state based on a control parameter and current value through the coil; and a control parameter setter configured to maintain or change the control parameter based on the on state or the off state control state of the driver controller.