发明授权
- 专利标题: Shutter control device for camera and control method therefor
- 专利标题(中): 相机用快门控制装置及其控制方法
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申请号: US871368申请日: 1992-04-20
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公开(公告)号: US5255049A公开(公告)日: 1993-10-19
- 发明人: Kazuo Akimoto , Shinji Miyata , Yoshiyuki Iwamatsu , Hiroko Fujita , Mitsuhiro Kakuta , Tomoki Nakamura
- 申请人: Kazuo Akimoto , Shinji Miyata , Yoshiyuki Iwamatsu , Hiroko Fujita , Mitsuhiro Kakuta , Tomoki Nakamura
- 申请人地址: JPX Tokyo
- 专利权人: Seikosha Co., Ltd.
- 当前专利权人: Seikosha Co., Ltd.
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX3-88198 19910419
- 主分类号: G03B7/093
- IPC分类号: G03B7/093 ; G03B7/097 ; G03B9/24 ; G03B7/08
摘要:
A shutter control device for a camera includes a control arrangement for controlling the opening and closing of the shutter as a function of an exposure value and a diaphragm value. The control arrangement stores values corresponding to a predetermined diaphragm setting, and employs the parameters of the predetermined setting and the exposure value and diaphragm value in order to determine the opening time of the shutter. In another arrangement, the control arrangement determines the effective exposure time as a function of the brightness of the object, distance to the object and a diaphragm, and employs this effective exposure time and a stored correction factor to determine the actual exposure time.
公开/授权文献
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