发明申请
- 专利标题: PHOTO DETECTION DEVICE
- 专利标题(中): 照片检测装置
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申请号: US12278141申请日: 2007-01-31
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公开(公告)号: US20090086071A1公开(公告)日: 2009-04-02
- 发明人: Keiichiro Kagawa , Jun Ohta , Yugo Nose , Atsushi Wada , Hajime Takashima
- 申请人: Keiichiro Kagawa , Jun Ohta , Yugo Nose , Atsushi Wada , Hajime Takashima
- 优先权: JP2006-026391 20060202; JP2006-026392 20060202
- 国际申请: PCT/JP2007/000046 WO 20070131
- 主分类号: H04N5/335
- IPC分类号: H04N5/335
摘要:
A pixel includes a photodiode, an overflow circuit, a first sensing circuit, and a second sensing circuit. The first sensing circuit charges and discharges a cathode capacitance by a photocurrent flowing through a photodiode, and amplifies an obtained voltage by a source follower amplifier so as to be outputted to a data line. The second sensing circuit charges and discharged the cathode capacitance by the photocurrent flowing through the photodiode, and outputs electric charge stored in the cathode capacitance via the data line. A pixel circuit is configured so that a first mode in which the first sensing circuit becomes active and a second mode in which the second sensing circuit becomes active can be switched. The first mode and the second mode are switched according to an amount of light received by the photodiode included in each pixel circuit. Gain is controlled according to the amount of light received, in the first mode, and the storage time is controlled in the second mode.
公开/授权文献
- US07916199B2 Photo detection device 公开/授权日:2011-03-29