公开(公告)号：US20130222584A1

公开(公告)日：2013-08-29

申请号：US13772663

申请日：2013-02-21

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Takeshi AOKI ,  Takayuki IKEDA ,  Yurika SATO ,  Koji DAIRIKI

IPC: H04N5/335 ,  H04N7/18 ,  H04N5/378 ,  H04N5/232

CPC classification number: H04N5/335 ,  H04N5/23254 ,  H04N5/378 ,  H04N7/18

Abstract: Provided is an image sensor having a pixel includes a photoelectric conversion element; a capacitor which is connected between the photoelectric conversion element; a reset circuit which resets a potential of a node between the photoelectric conversion element and the capacitor; an amplifier circuit which outputs a signal corresponding to the potential of the node; and a switch which controls electrical conduction between the amplifier circuit and a vertical signal line. When the node is brought into an electrically floating state, the potential of the optical signal is stored in the node in a state of being inverted. When an optical signal is detected while the potential is stored in the node, the potential of the node increases in accordance with an output potential of the photoelectric conversion element, and thus the potential of the node corresponds to a difference in potential between the optical signals in different light-receiving periods.

Abstract translation: 提供一种具有像素的图像传感器，包括光电转换元件; 连接在光电转换元件之间的电容器; 复位电路，其复位所述光电转换元件与所述电容器之间的节点的电位; 输出对应于该节点的电位的信号的放大器电路; 以及控制放大器电路和垂直信号线之间的导通的开关。 当节点处于电浮动状态时，光信号的电位以倒置的状态存储在节点中。 当在电位存储在节点中时检测到光信号时，节点的电位根据光电转换元件的输出电位而增加，因此节点的电位对应于光信号之间的电位差 在不同的光接收期。