发明授权
- 专利标题: Solid-state image sensing device providing a logarithmically proportional output signal
- 专利标题(中): 提供对数比例输出信号的固态图像感测装置
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申请号: US942349申请日: 1992-09-09
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公开(公告)号: US5241575A公开(公告)日: 1993-08-31
- 发明人: Shigehiro Miyatake , Kenji Takada , Jun Hasegawa , Yasuhiro Nanba
- 申请人: Shigehiro Miyatake , Kenji Takada , Jun Hasegawa , Yasuhiro Nanba
- 申请人地址: JPX Osaka
- 专利权人: Minolta Camera Kabushiki Kaisha
- 当前专利权人: Minolta Camera Kabushiki Kaisha
- 当前专利权人地址: JPX Osaka
- 优先权: JPX1-334472 19891221
- 主分类号: H01L27/148
- IPC分类号: H01L27/148
摘要:
An image sensing device that outputs a signal logarithmically proportional to the intensity of the incident light. The image sensing device makes use of a sub-threshold current flowing between the drain and source of a MOS transistor when the gate voltage is below the threshold voltage (above which the MOS transistor is nominally conductive and below which nominally non-conductive). Since the logarithmic conversion is done in the photosensing section of a solid-state image sensing device, the output from the device is already compressed and is easily handled by a small capacity CCD. Some output systems for the image sensing device of the present invention are also described.
公开/授权文献
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