发明申请
- 专利标题： PHOTODETECTOR
- 专利标题（中）： 照相机
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申请号： US13113470申请日： 2011-05-23
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公开(公告)号： US20110291013A1公开(公告)日： 2011-12-01
- 发明人: Yoshiyuki KUROKAWA , Takayuki IKEDA , Hikaru TAMURA , Munehiro KOZUMA , Masataka IKEDA
- 申请人： Yoshiyuki KUROKAWA , Takayuki IKEDA , Hikaru TAMURA , Munehiro KOZUMA , Masataka IKEDA
- 申请人地址： JP Kanagawa-ken
- 专利权人： SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
- 当前专利权人： SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
- 当前专利权人地址： JP Kanagawa-ken
- 优先权： JP2010-122208 20100528
- 主分类号： G01J5/00
- IPC分类号： G01J5/00 ; G01J1/42 ; H01J40/14
摘要：
Influence of external light is suppressed. With a photodetector including a photodetector circuit which generates a data signal in accordance with illuminance of incident light and a light unit which overlaps with the photodetector circuit, a first data signal is generated by the photodetector circuit when the light unit is in an ON state, a second data signal is formed by the photodetector circuit when the light unit is in an OFF state, and the first data signal and the second data signal are compared, so that a difference data signal that is data of a difference between the two compared data signals is generated.