Chiwin Law LLC
Ultrasonic fingerprint identification circuit, driving method thereof, and fingerprint identification device
Embodiments of the present disclosure provide an ultrasonic fingerprint identification circuit, a driving method thereof, and a fingerprint identification device. The circuit includes a transmitting electrode, a receiving electrode, a piezoelectric layer disposed between the transmitting electrode and the receiving electrode, and a signal output unit, the transmitting electrode is configured to receive an alternating current signal in a transmitting stage; the receiving electrode is connected with the signal output unit. The circuit further includes a photosensitive unit, with an anode connected with the receiving electrode and a cathode connected with a first fixed electric level so that the photosensitive unit is in a reverse bias state.
BOE Technology Group Co., Ltd.
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G06V G06V
inventional inventional
Chenyang Lei Haisheng Xiaochuan Xiaoliang Yingming Xiufeng Changfeng
Zhang Wang Wang Chen Ding Liu Li Li