Invention Grant
- Patent Title: Stepping motor control circuit, movement, and analogue electronic timepiece
- Patent Title (中): 步进电机控制电路,机芯及模拟电子表
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Application No.: US13713060Application Date: 2012-12-13
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Publication No.: US08721170B2Publication Date: 2014-05-13
- Inventor: Saburo Manaka , Kenji Ogasawara , Kazumi Sakumoto , Keishi Honmura , Kosuke Yamamoto
- Applicant: Seiko Instruments Inc.
- Applicant Address: JP
- Assignee: Seiko Instruments Inc.
- Current Assignee: Seiko Instruments Inc.
- Current Assignee Address: JP
- Agency: Adams & Wilks
- Priority: JP2011-277569 20111219; JP2012-197536 20120907
- Main IPC: G04B18/00
- IPC: G04B18/00

Abstract:
A rotation detection unit configured to detect the condition of rotation of a stepping motor on the basis of an induced signal generated in a drive coil of the stepping motor in a detection period in which the condition of rotation of the stepping motor is detected and a control unit configured to rotationally drive the stepping motor by supplying a drive signal to the drive coil of the stepping motor within the driving period in which the stepping motor is rotationally driven are provided. The driving period and part of the detection period are configured to overlap with each other in a first time interval, and the control unit stops supply of the drive signal to the drive coil of the stepping motor in the first time interval.
Public/Granted literature
- US20130170328A1 STEPPING MOTOR CONTROL CIRCUIT, MOVEMENT, AND ANALOGUE ELECTRONIC TIMEPIECE Public/Granted day:2013-07-04
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