发明授权
- 专利标题： Driving circuit for camera shutters
- 专利标题（中）： 相机百叶窗驱动电路
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申请号： US859194申请日： 1977-12-09
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公开(公告)号： US4190344A公开(公告)日： 1980-02-26
- 发明人: Yasuo Ishiguro , Kenji Wakazono
- 申请人： Yasuo Ishiguro , Kenji Wakazono
- 申请人地址： JPX Tokyo
- 专利权人： Copal Company Limited
- 当前专利权人： Copal Company Limited
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX51-159906 19761227
- 主分类号： G03B7/26
- IPC分类号： G03B7/26 ; G03B9/62 ; G03B9/08
摘要：
A shutter driving circuit including a voltage judging circuit and indicating circuit in order to always properly make shutter opening and closing operations, whereby an electric current is prevented from flowing to driving coils and such state can be indicated by the indicating circuit when the voltage of a current source for feeding a current to a pair of driving coils to be made to make opening and closing motions of the shutter by the voltage judging circuit is below a predetermined value.
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