发明授权
- 专利标题: Photo-electric conversion device with accumulation time control and leakage current compensation
- 专利标题(中): 具有累加时间控制和漏电流补偿的光电转换装置
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申请号: US593991申请日: 1984-03-27
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公开(公告)号: US4544848A公开(公告)日: 1985-10-01
- 发明人: Masahiro Kawasaki , Harumi Aoki , Koji Suzuki
- 申请人: Masahiro Kawasaki , Harumi Aoki , Koji Suzuki
- 申请人地址: JPX
- 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: JPX
- 优先权: JPX55-16355 19810206; JPX55-16356 19810206
- 主分类号: G01J1/44
- IPC分类号: G01J1/44 ; G02B7/36 ; H04N5/353 ; H04N5/369 ; H01J40/14
摘要:
A photo-electric conversion device is provided with a light receiving array and circuits serving to scan the same. A light receiving device separate from the array and connected in parallel therewith is used as a part of a control device for controlling the accumulation time of the array. A saturation detection circuit may be arranged to receive the output of the array and to vary the accumulation time by a suitable factor when array saturation occurs. The conversion device may also be provided with means for compensating for leak currents in the conversion block, so as to facilitate higher linearity at low illumination intensities.