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公开(公告)号：US11468702B1
公开(公告)日：2022-10-11
申请号：US17462063
申请日：2021-08-31
Applicant: Japan Display Inc.
Inventor： Xingle Wang
Abstract: A fingerprint capturing apparatus includes a plurality of panel capacitors each configured to output an alternating charge signal indicating a capacitance proportional to a proximity of a portion of a subject's finger, a de-serialized amplifier circuit including an operational amplifier that receives the alternating charge signal from the plurality of panel capacitors, and a change in condition control circuit configured to make a change in an operating condition of the de-serialized amplifier based on a voltage of an output of the operational amplifier. The change in condition control circuit also configured to output a count of a number of times of making the change in the operating condition of the de-serialized amplifier. The apparatus also including a processor circuit configured to recognize the subject's fingerprint based on the count of the number of times of making the change in the operating condition of the de-serialized amplifier.
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公开(公告)号：US11953373B1
公开(公告)日：2024-04-09
申请号：US17967898
申请日：2022-10-18
Applicant: Japan Display Inc.
Inventor： Naoki Takada , Xingle Wang , Chung-Kai Chen
CPC classification number: G01J1/44 , G01J1/46 , G01J2001/446 , G01J2001/448
Abstract: According to one embodiment, a sensor device comprises a sensor configured to output a sense signal, a value the sense signal changing over time based on incident light, a first reset circuit configured to set the value of the sense signal to a reset value when the value of the sense signal exceeds a threshold, a counter configured to count a first number of times of reset by the first reset circuit, and an arithmetic operation circuit configured to calculate an amount of incident light of a certain period based on the value of the sense signal, the reset value, and the first number of times of reset.
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