Invention Grant
- Patent Title: Electronic timepiece and control method of electronic timepiece
- Patent Title (中): 电子钟表及电子表的控制方法
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Application No.: US14938968Application Date: 2015-11-12
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Publication No.: US09442465B2Publication Date: 2016-09-13
- Inventor: Kosuke Yamamoto , Kenji Ogasawara , Kazuhiro Koyama , Kazumi Sakumoto , Tamotsu Maesawa , Tomohiro Ihashi , Ayumi Matsumoto , Akira Takakura
- Applicant: SEIKO INSTRUMENTS INC.
- Applicant Address: JP
- Assignee: SEIKO INSTRUMENTS INC.
- Current Assignee: SEIKO INSTRUMENTS INC.
- Current Assignee Address: JP
- Agency: Adams & Wilks
- Priority: JP2014-230859 20141113; JP2015-163995 20150821
- Main IPC: G04C10/02
- IPC: G04C10/02 ; G04G19/00 ; G04G19/06 ; G04G17/02 ; G04G3/00

Abstract:
An electronic timepiece includes a solar power source, a voltage stabilizer circuit that generates a constant voltage by using power supplied from the solar power source, and a control circuit that clocks the time by driving a rotating body at first hand operation speed and at second hand operation speed which is faster than the first hand operation speed. The control circuit selects a voltage of the solar power source so as to drive the rotating body in a case of the first hand operation speed, and selects at least any one voltage of the constant voltage and the voltage of the solar power source so as to drive the rotating body in a case of the second hand operation speed.
Public/Granted literature
- US20160139569A1 ELECTRONIC TIMEPIECE AND CONTROL METHOD OF ELECTRONIC TIMEPIECE Public/Granted day:2016-05-19
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