Fay Sharpe LLP
Light detection circuit, electronic device, and optical recognition method
A light detection circuit, an electronic device, and an optical recognition method are provided. The light detection circuit includes a charge storage sub-circuit (10), a photoelectric conversion sub-circuit (30), a signal collection sub-circuit (40), and a potential pull-up sub-circuit (50). When a potential of a reading node (A) is decreased by a preset value, the potential pull-up sub-circuit (50) changes the potential of the reading node (A) to an initial potential. A photoelectric diode may continuously generate a light current under the action of light, so that the potential of the reading node (A) is decreased again. Even when the intensity of ambient light is high, a touch can be accurately recognized in an optical touch recognition circuit, and ridge lines and valley lines can be accurately recognized in an optical fingerprint recognition circuit.
BOE TECHNOLOGY GROUP CO., LTD.
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G06V G06F G06F G06V
inventional inventional inventional inventional
Haisheng Bo Wei Ping Xueyou Pengpeng Xue Yingming Likai Xiaoliang
Wang Chen Liu Zhang Cao Wang Dong Liu Deng Ding