Invention Grant
- Patent Title: Electronic timepiece, movement, and motor control circuit for a timepiece
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Application No.: US16780985Application Date: 2020-02-04
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Publication No.: US11294334B2Publication Date: 2022-04-05
- Inventor: Tomoki Okuhata
- 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: JPJP2019-018635 20190205
- Main IPC: G04C3/14
- IPC: G04C3/14 ; H02P8/02 ; H02P8/40 ; H02P8/12 ; H02P8/34

Abstract:
An electronic timepiece enables driving a motor in a reverse direction. The timepiece has a current detector detecting a current value flowing through a coil; a driver controller that outputs, according to the detected current value, a first drive signal turning the rotor in a forward direction to a position not pulled to a second statically stable position from a position where the rotor is pulled to a first statically stable position, outputs a second drive signal turning the rotor in a reverse direction past the dynamically stable position after outputting the first drive signal, and outputs a third drive signal turning the rotor in the reverse direction after outputting the second drive signal; and a driver that is controlled according to the first, second and third drive signals to an on state supplying drive current to the coil and an off state not supplying drive current to the coil.
Public/Granted literature
- US20200249631A1 Electronic Timepiece, Movement, And Motor Control Circuit For A Timepiece Public/Granted day:2020-08-06
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