发明授权
- 专利标题: Shutter speed digital display device for cameras
- 专利标题(中): 快门速度数码相机显示装置
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申请号: US624996申请日: 1975-10-22
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公开(公告)号: US4067023A公开(公告)日: 1978-01-03
- 发明人: Naoyuki Uno , Tetsuji Shono , Fumio Urano , Kunio Mita , Masahiro Kawasaki , Chiharu Mori
- 申请人: Naoyuki Uno , Tetsuji Shono , Fumio Urano , Kunio Mita , Masahiro Kawasaki , Chiharu Mori
- 申请人地址: JA Tokyo
- 专利权人: Asahi Kogaku Kogyo Kabushiki Kaisha
- 当前专利权人: Asahi Kogaku Kogyo Kabushiki Kaisha
- 当前专利权人地址: JA Tokyo
- 优先权: JA49-133947[U] 19741105
- 主分类号: G03B7/00
- IPC分类号: G03B7/00 ; G03B7/04 ; G03B7/093 ; G03B17/20 ; G03B17/18
摘要:
A shutter speed digital display device for cameras equipped with both automatic and manual shutter speed controls is disclosed. A shutter speed display control circuit generates a first digital signal in accordance with the adjustment of the camera's shutter speed by an automatic shutter speed control circuit. The first digital signal is decoded and used to control a light-transmitting liquid crystal device display. In addition, when the camera is in a manual mode of operation, the first digital signal is compared with a second digital signal related to manually adjusted shutter speed. If the comparisons are equal, a coincidence indicator is energized.
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