Fingerprint identification module, display panel and display device

    公开(公告)号:US11615641B2

    公开(公告)日:2023-03-28

    申请号:US17515256

    申请日:2021-10-29

    Abstract: A fingerprint identification module is provided. The fingerprint identification module includes: a base substrate, a first conductive layer, and a third conductive layer that are laminated sequentially. The first conductive layer includes a first signal line and a second signal line, wherein the first signal line extends along a first direction and is connected to a gate of a reset transistor in a pixel sensing circuit, and the second signal line extends along the first direction and is connected to a gate of a switch transistor in the pixel sensing circuit. The third conductive layer includes a first conductive portion configured to form a first electrode of a photodiode in the pixel sensing circuit, wherein an orthographic projection of the first conductive portion on the base substrate does not overlap with orthographic projections of the first signal line and the second signal line on the base substrate.

    PIXEL DETECTING CIRCUIT, METHOD FOR DRIVING THE SAME, AND TOUCH DISPLAY PANEL

    公开(公告)号:US20210365144A1

    公开(公告)日:2021-11-25

    申请号:US16496915

    申请日:2019-04-30

    Abstract: The present disclosure discloses a pixel detecting circuit, a method for driving the same, and a touch display panel. The pixel detecting circuit includes: a plurality of pixel detecting modules arranged in an array; and at least one reading line, wherein each of the reading line is connected to a group of pixel detecting modules, and each group of pixel detecting modules comprises at least two columns of pixel detecting modules; wherein a number of pixel detecting modules included in each group of pixel detecting modules are respectively connected to different control signal terminals, and configured to transmit, under driving of control signals outputted from the different control signal terminals, electrical signals to the connected reading line in any one of a time dividing manner and a frequency dividing manner.

    PHOTOELECTRIC DETECTION CIRCUIT, METHOD OF CONTROLLING PHOTOELECTRIC DETECTION CIRCUIT, AND PIXEL UNIT

    公开(公告)号:US20240184405A1

    公开(公告)日:2024-06-06

    申请号:US17795785

    申请日:2021-09-27

    CPC classification number: G06F3/042 H01L27/14612 H01L27/14643

    Abstract: A photoelectric detection circuit, a method of controlling the photoelectric detection circuit and a pixel unit are provided. The photoelectric detection circuit includes: a detection sub-circuit configured to generate a current flowing between a bias voltage signal terminal and a input node in response to an optical signal; a storage sub-circuit connected between the bias voltage signal terminal and the input node, and configured to store energy based on the current generated by the detection sub-circuit; an integrator sub-circuit having a first input terminal, a second input terminal and an output terminal, and configured to integrate a signal of the first input terminal based on a potential of the second input terminal to generate an integrated signal and output the integrated signal at the output terminal; and a control sub-circuit connected to a control signal terminal, the input node and the first input terminal of the integrator sub-circuit.

    Photoelectric detection circuit, method of controlling photoelectric detection circuit, and pixel unit

    公开(公告)号:US12130990B2

    公开(公告)日:2024-10-29

    申请号:US17795785

    申请日:2021-09-27

    CPC classification number: G06F3/042 H01L27/14612 H01L27/14643

    Abstract: A photoelectric detection circuit, a method of controlling the photoelectric detection circuit and a pixel unit are provided. The photoelectric detection circuit includes: a detection sub-circuit configured to generate a current flowing between a bias voltage signal terminal and a input node in response to an optical signal; a storage sub-circuit connected between the bias voltage signal terminal and the input node, and configured to store energy based on the current generated by the detection sub-circuit; an integrator sub-circuit having a first input terminal, a second input terminal and an output terminal, and configured to integrate a signal of the first input terminal based on a potential of the second input terminal to generate an integrated signal and output the integrated signal at the output terminal; and a control sub-circuit connected to a control signal terminal, the input node and the first input terminal of the integrator sub-circuit.

    Fingerprint detection device and fingerprint detection method

    公开(公告)号:US11308727B2

    公开(公告)日:2022-04-19

    申请号:US16622557

    申请日:2019-05-30

    Abstract: The present disclosure provides a fingerprint detection device and method. The fingerprint detection device includes a detection substrate and a signal converter. The detection substrate includes pixels arranged in rows and columns. Each pixel includes a sensing circuit configured to receive an optical signal and output a sensing electrical signal according to the received optical signal. The signal converter includes A/D converters each coupled to one column of sensing circuits. The fingerprint detection device further includes a control circuit coupled to the sensing circuits and the A/D converters and configured to obtain common mode component of sensing electrical signals output by sensing circuits of at least part of the pixels and provide information about the common mode component to the A/D converters. The A/D converter is configured to perform analog-to-digital conversion on difference between the sensing electrical signal from corresponding sensing circuit and the common mode signal.

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