发明授权
US5594715A Exposure control device of a camera and method 失效
照相机曝光控制装置及方法

  • 专利标题: Exposure control device of a camera and method
  • 专利标题(中): 照相机曝光控制装置及方法
  • 申请号: US571637
    申请日: 1995-12-13
  • 公开(公告)号: US5594715A
    公开(公告)日: 1997-01-14
  • 发明人: Akira Ogasawara
  • 申请人: Akira Ogasawara
  • 申请人地址: JPX Tokyo
  • 专利权人: Nikon Corporation
  • 当前专利权人: Nikon Corporation
  • 当前专利权人地址: JPX Tokyo
  • 优先权: JPX6-318161 19941221
  • 主分类号: G03B7/083
  • IPC分类号: G03B7/083 G03B7/093 G03B7/26
Exposure control device of a camera and method
摘要:
A camera exposure control device reduces battery power consumption during film exposure at the picture shooting time for long exposure times greater than several seconds such as bulb shooting and time shooting. The camera exposure control device includes a power source line from a battery power source to a control device and the like. A DC/DC converter is also on the power line. The control device stops operation of the DC/DC converter during the long exposure time where the shutter time is longer than a predetermined time. In other words, the control device controls the operation of the DC/DC converter during film exposure at shooting times where the film exposure time is longer than several seconds. The control device interrupts the DC/DC converter during these long exposure times. Further, other electric parts such as IC's and devices that do not require electricity supplied during the long exposure times can be turned off by the control device.
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