Invention Grant
- Patent Title: Timepiece, electronic device, and control method of timepiece
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Application No.: US16135535Application Date: 2018-09-19
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Publication No.: US10539927B2Publication Date: 2020-01-21
- Inventor: Akihito Okumura , Ryosuke Isogai , Kosuke Yamamoto
- Applicant: Seiko Instruments Inc.
- Applicant Address: JP Chiba
- Assignee: SEIKO INSTRUMENTS INC.
- Current Assignee: SEIKO INSTRUMENTS INC.
- Current Assignee Address: JP Chiba
- Agency: Brinks Gilson & Lione
- Priority: JP2017-181685 20170921
- Main IPC: G04C3/14
- IPC: G04C3/14 ; G04C10/00 ; H02P8/02

Abstract:
A timepiece includes a voltage detection unit that detects a voltage applied to a stepping motor for driving an indicating hand, and that outputs a voltage detection result, and a drive control unit that controls a rotor to perform reverse rotation by using a reverse rotation pulse including a first pulse whose polarity is the same as that of a normal rotation pulse for causing the rotor of the stepping motor to perform normal rotation, a second pulse whose polarity is reverse to that of the first pulse, and a third pulse whose polarity is reverse to that of the second pulse, and to control the rotor to perform the reverse rotation by using the third pulse having a pulse width set in accordance with the voltage detection result.
Public/Granted literature
- US20190086873A1 TIMEPIECE, ELECTRONIC DEVICE, AND CONTROL METHOD OF TIMEPIECE Public/Granted day:2019-03-21
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