Fingerprint recognition integrated circuit and fingerprint recognition device including the same

    公开(公告)号:US11244139B2

    公开(公告)日:2022-02-08

    申请号:US16534574

    申请日:2019-08-07

    Abstract: A fingerprint recognition device includes a display, a touch sensor panel (TSP) which senses a touch, and a fingerprint recognition integrated circuit (FPIC) which scans a fingerprint. The FPIC includes a pixel including a photoelectric element which receives light reflected by the fingerprint, a low noise amplifier (LNA) which outputs a signal voltage by converting an electric charge received from the photoelectric element, and an analog-to-digital converter (ADC) which converts the signal voltage into a digital signal. The ADC includes a variable reference voltage generator which provides a variable reference voltage, a comparator which adds the variable reference voltage to the signal voltage, performs correlated double sampling on the result of the addition, and outputs a comparison signal by comparing the result of the correlated double sampling with a ramp voltage, and a counter which outputs the digital signal by counting the comparison signal.

    Security verification apparatus using biometric information and security verification method

    公开(公告)号:US10122532B2

    公开(公告)日:2018-11-06

    申请号:US15176460

    申请日:2016-06-08

    Inventor: Hee Bum Lee

    Abstract: A security verification apparatus using biometric information and a security verification method are described. The security verification apparatus includes a sensor configured to acquire images of biometric information of a user, and scramble the images of the biometric information by using a received key matrix. The security verification apparatus further includes an information processor configured to generate the key matrix by using a random key, transmit the key matrix to the sensor, decode data of the scrambled images received from the sensor by using the key matrix, and verify the user.

    FINGERPRINT RECOGNITION INTEGRATED CIRCUIT AND FINGERPRINT RECOGNITION DEVICE INCLUDING THE SAME

    公开(公告)号:US20200218870A1

    公开(公告)日:2020-07-09

    申请号:US16534574

    申请日:2019-08-07

    Abstract: A fingerprint recognition device includes a display, a touch sensor panel (TSP) which senses a touch, and a fingerprint recognition integrated circuit (FPIC) which scans a fingerprint. The FPIC includes a pixel including a photoelectric element which receives light reflected by the fingerprint, a low noise amplifier (LNA) which outputs a signal voltage by converting an electric charge received from the photoelectric element, and an analog-to-digital converter (ADC) which converts the signal voltage into a digital signal. The ADC includes a variable reference voltage generator which provides a variable reference voltage, a comparator which adds the variable reference voltage to the signal voltage, performs correlated double sampling on the result of the addition, and outputs a comparison signal by comparing the result of the correlated double sampling with a ramp voltage, and a counter which outputs the digital signal by counting the comparison signal.

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