Invention Grant
- Patent Title: Electronic timepiece, movement, and motor control circuit
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Application No.: US16810919Application Date: 2020-03-06
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Publication No.: US11429067B2Publication Date: 2022-08-30
- Inventor: Reiko Nagahama , Takashi Kawaguchi
- Applicant: Seiko Epson Corporation
- Applicant Address: JP Tokyo
- Assignee: Seiko Epson Corporation
- Current Assignee: Seiko Epson Corporation
- Current Assignee Address: JP Tokyo
- Agency: Harness, Dickey & Pierce, P.L.C.
- Priority: JPJP2019-042313 20190308
- Main IPC: H02P8/02
- IPC: H02P8/02 ; H02P8/12 ; H02P8/28 ; H02P6/15 ; G04C3/14

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.
Public/Granted literature
- US20200285200A1 ELECTRONIC TIMEPIECE, MOVEMENT, AND MOTOR CONTROL CIRCUIT Public/Granted day:2020-09-10
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