公开(公告)号：US20230169787A1

公开(公告)日：2023-06-01

申请号：US17913226

申请日：2021-03-23

Applicant: Fingerprint Cards Anacatum IP AB

Inventor： Andreas LARSSON ,  David CARLING

IPC: G06V40/13 ,  G06V40/12

CPC classification number: G06V40/1318 ,  G06V40/1365 ,  H01L25/167

Abstract: A fingerprint sensing system comprising a plurality of conductive selection lines; a plurality of conductive read-out lines crossing the selection lines; selection circuitry controllable to provide a selection signal on at least one selected selection line in the plurality of selection lines; a plurality of pixel elements formed at intersections between the selection lines and the read-out lines; read-circuitry coupled to each read-out line in the plurality of read-out lines, the read-out circuitry being configured to acquire a read-out signal via a read-out line connected to a selected pixel element, and calibration circuitry having an input for receiving a calibration input signal and an output for providing a calibration output signal, the calibration output signal being formed through interaction between the calibration input signal and the calibration circuitry.

公开(公告)号：US20220405408A1

公开(公告)日：2022-12-22

申请号：US17638910

申请日：2020-08-31

Applicant: Fingerprint Cards Anacatum IP AB

Inventor： David CARLING ,  Joachim STRÖMBERGSON

IPC: G06F21/62 ,  G06V40/13 ,  G06V40/50

Abstract: The present disclosure relates to a fingerprint sensing system and a method performed by the fingerprint sensing system of verifying that setting data of a fingerprint sensor of the fingerprint sensing system has not been modified. In aspect, a method performed by a fingerprint sensing system of verifying that setting data of a fingerprint sensor of the fingerprint sensing system has not been modified is provided. The method comprises blocking access to the fingerprint sensor setting data held in a storage of the fingerprint sensing system, acquiring from the fingerprint sensor a representation of the fingerprint sensor setting data to be utilized upon capturing a fingerprint image, and verifying from the acquired representation if the fingerprint sensor setting data corresponds to fingerprint sensor setting data that previously was written to the storage.