公开(公告)号：US20230410550A1

公开(公告)日：2023-12-21

申请号：US18249263

申请日：2021-11-23

Applicant: FINGERPRINT CARDS ANACATUM IP AB

Inventor： Arvid Hammar ,  Hans Martinsson

IPC: G06V40/13 ,  G06V40/12 ,  G02B5/28 ,  G02B5/20 ,  G06F3/041

CPC classification number: G06V40/1318 ,  G06V40/1365 ,  G06V40/1324 ,  G02B5/28 ,  G02B5/204 ,  G06F3/0412

Abstract: A display arrangement comprising an optical biometric imaging device for imaging a biometric object comprising: an image sensor comprising a plurality of photodetector pixels; a lens arrangement comprising at least one lens configured to focus light reflected by a biometric object onto the image sensor; an aperture layer arranged between the object to be imaged and the image sensor, wherein the aperture layer comprises an aperture configured to limit the amount of light reaching the image sensor; and a filter element arranged in the aperture and configured to block light within a first wavelength range, wherein an area of the filter element is smaller than an area of the aperture so that a portion of light within the first wavelength range reaching the aperture layer pass through the aperture.

公开(公告)号：US11830276B2

公开(公告)日：2023-11-28

申请号：US17760630

申请日：2020-09-08

Applicant: Fingerprint Cards Anacatum IP AB

Inventor： Hamed Bouzari

IPC: G06V40/13 ,  G06F3/043

CPC classification number: G06V40/1306 ,  G06F3/043

Abstract: The invention relates to an ultrasonic biometric imaging system comprising: a cover structure having a touch surface; a plurality of ultrasonic transducers arranged at a periphery of the touch surface; a plurality of mixed-signal integrated circuits configured to: AD-convert a received analog echo-signal to form a digital echo signal for each active ultrasonic transducer in the subset of ultrasonic transducers; perform local beamforming by introducing a first controllable delay to each digital echo signal to form a plurality of delayed echo signals; and sum the delayed echo signals to form an intermediate signal. The biometric imaging system further comprises a host processor connected to each of the plurality of mixed-signal integrated-circuits and configured to: receive intermediate signals from the of mixed-signal integrated-circuits; perform global beamforming by introducing a second controllable delay to each intermediate signal; and sum the delayed intermediate signals to form a final echo signal.

公开(公告)号：US20230375612A1

公开(公告)日：2023-11-23

申请号：US18248418

申请日：2021-11-02

Applicant: FINGERPRINT CARDS ANACATUM IP AB

Inventor： Frank Riedijk ,  Wouter Brevet ,  Hans Thörnblom ,  Anton Landberg

IPC: G01R31/28 ,  G01R27/26 ,  G06V40/13 ,  G06F21/32

CPC classification number: G01R31/2829 ,  G01R27/2605 ,  G06V40/1306 ,  G06F21/32

Abstract: A method of evaluating a dielectric structure, comprising the steps of a) changing a potential difference between each sensing structure in a first set of sensing structures and each sensing structure in a second set of sensing structures, and to providing, for each sensing structure in the first set of sensing structures, a sensing signal indicative of a strength of a capacitive coupling between each sensing structure in the second set of sensing structures and the sensing structure in the first set of sensing structures; b) assign other sensing structures to the first set of sensing structures and the second set of sensing structures; c) performing step a) and step b) until a respective sensing signal has been provided for each sensing structure in the plurality of sensing structures; and d) providing an evaluation result based on the respective sensing signals.

公开(公告)号：US11823487B2

公开(公告)日：2023-11-21

申请号：US17918373

申请日：2021-04-29

Applicant: FINGERPRINT CARDS ANACATUM IP AB

Inventor： Troels Bjerre ,  Peter Bjørn-Jørgensen

IPC: G06V40/12 ,  G06T7/246 ,  G06V40/60 ,  G06V40/50

CPC classification number: G06V40/1335 ,  G06T7/246 ,  G06V40/1365 ,  G06V40/50 ,  G06V40/67

Abstract: Method for forming an enrolled fingerprint template for a user of a fingerprint touch sensor. The method comprising: during a touch event in which a finger of the user is placed on the fingerprint sensor, capturing a plurality of images of the finger and comparing two of the images to determine if there is a valid transformation. If there is no valid transformation, images are compared against image quality and coverage thresholds to determine if any of the captured images are to be used for enrollment.

公开(公告)号：US20230342444A1

公开(公告)日：2023-10-26

申请号：US18028892

申请日：2021-09-29

Applicant: Fingerprint Cards Anacatum IP AB

Inventor： Johan HAMMERSBERG ,  Pontus JÄGEMALM

IPC: G06F21/32 ,  G06V40/12 ,  H01L27/146 ,  G06V40/13 ,  G02B5/30

CPC classification number: G06F21/32 ,  G06V40/1365 ,  H01L27/14627 ,  H01L27/14649 ,  G06V40/1318 ,  G02B5/30

Abstract: The present invention relates to a biometric imaging arrangement configured to be arranged under an at least partly transparent display panel and to acquire an infrared image of an object located on the opposite side of the least partly transparent display panel, the biometric imaging arrangement comprising: an image sensor comprising a detector pixel array configured to detect infrared light transmitted from the object for capturing an image, an at least partly transparent substrate comprising an array of microlenses, wherein each microlens is configured to redirect light through the least partly transparent substrate and onto the detector pixel array, wherein the at least partly transparent substrate further comprises optical decoupling areas configured to orthogonally redirect infrared light received from a side of the at least partly transparent substrate towards the object when being placed for imaging.

公开(公告)号：US11727711B2

公开(公告)日：2023-08-15

申请号：US18010006

申请日：2021-06-23

Applicant: FINGERPRINT CARDS ANACATUM IP AB

Inventor： Hans Thörnblom ,  Daniel Andersson ,  Frank Riedijk ,  Johannes Arvidsson ,  Rasmus Söderström Olsson

IPC: G06V40/13 ,  G06V10/10

CPC classification number: G06V40/13 ,  G06V10/17

Abstract: A fingerprint sensing system for sensing a finger surface of a finger, comprising: an array of sensing elements arranged under a sensing surface, each sensing element in the array of sensing elements being configured to sense a property indicative of a distance between the sensing element and the finger surface; and read-out circuitry coupled to the array of sensing elements and configured to provide, for each sensing element in the array of sensing elements, a timing indication indicative of a time when a value of the property sensed by the sensing element reached a predefined threshold value.

公开(公告)号：US11657642B2

公开(公告)日：2023-05-23

申请号：US17620176

申请日：2020-06-24

Applicant: FINGERPRINT CARDS ANACATUM IP AB

Inventor： Arne Husth

IPC: G06V40/13 ,  G06V10/14 ,  G06V40/12 ,  G06V10/24 ,  H01L27/146 ,  G06F3/041

CPC classification number: G06V40/1318 ,  G06V10/14 ,  G06V10/24 ,  G06V40/1324 ,  G06V40/1335 ,  G06V40/1365 ,  G06F3/0418 ,  H01L27/14623 ,  H01L27/14627 ,  H01L27/14678

Abstract: The present invention relates to a method for producing a biometric image using an optical biometric imaging arrangement including a set of micro lenses adapted to redirect incoming light onto a photodetector pixel array, the method comprising: capturing a biometric image including a set of sub-images using an optical biometric imaging device; estimating a spatial transformation between the at least one biometric sub-image and corresponding masking calibration sub-images; applying the spatial transformation to retrieved illuminance calibration sub-images adapted for illuminance calibration for captured biometric sub-images to align the illuminance calibration sub-images with the biometric image; and normalizing the biometric sub-images using the aligned calibration sub-images for providing a normalized biometric image based on the normalized biometric sub-images.

公开(公告)号：US20230137785A1

公开(公告)日：2023-05-04

申请号：US17917806

申请日：2021-03-29

Applicant: Fingerprint Cards Anacatum IP AB

Inventor： Johan HAMMERSBERG ,  Eric SETTERBERG ,  Mattias CARLÉN ,  Su LIU

IPC: G06V40/40 ,  G06V40/12 ,  G06V40/13 ,  G06V10/145 ,  G06V10/147 ,  G06V10/56 ,  G06V10/82 ,  G06F21/32

Abstract: The present invention relates biometric authentication using an optical biometric arrangement comprising an image sensor comprising a photodetector pixel array configured to capture an image of an object, the image sensor being arranged under a controllable light source comprising light source units, the method comprising: providing a light pattern comprising portions of different light intensity for illuminating the object; acquiring an image of the object, the image comprising image portions corresponding to the portions of different light intensity of the light pattern illuminating the object, at least one image portion being captured by pixels in he photodetector pixel array arranged directly under a light source unit being active during image acquisition, and at least one image portion being captured by pixels in the photodetector pixel array arranged under an at least partly in-active illumination area of the controllable light source during image acquisition, performing biometric authentication at least partly based on metrics extracted from the image portions.

公开(公告)号：US20230021212A1

公开(公告)日：2023-01-19

申请号：US17783063

申请日：2020-12-02

Applicant: Fingerprint Cards Anacatum IP AB

Inventor： Zhimin MO ,  Zhecheng SHAO

IPC: G06K19/07 ,  G06K19/077 ,  G06V40/13

Abstract: A biometric sensor module for detecting a biometric feature of a user comprises: a biometric sensor comprising an array of sensing elements for acquiring sensing signals indicative of a biometric feature of a user, the array of sensing elements arranged facing towards a front side of the biometric sensor. Further, the biometric sensor module comprises a bottom flexible film attached to a back side, opposite the front side, of the biometric sensor. The bottom flexible film can carry at least one electrically conductive line electrically connectable to the biometric sensor and electrically connectable to an external electrical circuit. The biometric sensor module further comprises a top film attached to the biometric sensor closer to the front side of the biometric sensor than the bottom flexible film. The flexible film includes a bent portion such that the flexible film is bent towards the top film.

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.