发明名称 |
Electronic timepiece having a stepping motor and driving circuit compensated for power source variations |
摘要 |
An electronic timepiece comprising a power source, an electronic circuit, a stepping motor, and a detecting device for detecting a rotor movement after the stepping motor is driven. The electronic circuit includes a power source voltage detecting circuit and driving power controlling device which intermits driving pulses of the stepping motor according to an output of the voltage detecting circuit so that the driving force is substantially constant and the power consumption is decreased.
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申请公布号 |
US4433401(A) |
申请公布日期 |
1984.02.21 |
申请号 |
US19800168319 |
申请日期 |
1980.07.10 |
申请人 |
SEIKO INSTRUMENTS & ELECTRONICS LTD. |
发明人 |
SHIDA, MASAHARU;UEDA, MAKOTO |
分类号 |
G04C3/14;H02P8/02;(IPC1-7):G04B9/00 |
主分类号 |
G04C3/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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