公开(公告)号：US11216639B2

公开(公告)日：2022-01-04

申请号：US16619185

申请日：2018-05-31

Applicant: FINGERPRINT CARDS AB

Inventor： Morten Hansen ,  Klaus S. Andersen ,  Morten Jensen ,  Morten With Pedersen

IPC: G06K9/00 ,  G06K9/03

Abstract: The method comprises capturing a plurality of images of a single biometric object during a single activation of a biometric sensor and ranking the images based on a ranking metric value of each of the images to determine a highest ranked image and at least one non-highest ranked image. The method comprises comparing, in a first matching attempt for the biometric object, the highest ranked image to templates of a plurality of pre-stored biometric object templates, wherein a matching metric is determined for each compared template, and generating a match indicating signal when it is determined that at least one of the matching metrics exceeds a matching threshold value. When it is determined that none of the matching metrics exceed the matching threshold value, one of the non-highest ranked images is compared, in a further matching attempt, to templates of the plurality of templates based on the matching metrics.

公开(公告)号：US20210407822A1

公开(公告)日：2021-12-30

申请号：US16763671

申请日：2018-11-15

Applicant: Fingerprint Cards AB

Inventor： Olivier LIGNIER

IPC: H01L21/56 ,  G06K9/00 ,  H01L23/31

Abstract: A method of manufacturing a fingerprint sensor component having a component outline for integration into an electronic device, the method comprising the steps of: providing a fingerprint sensor package having a sensing surface, a connection surface opposite the sensing surface, and sides connecting the sensing surface and the connection surface, the connection surface having connectors for allowing electrical connection of the fingerprint sensor component to the electronic device; arranging the fingerprint sensor package on a temporary carrier with the connection surface facing the temporary carrier; and adding material at least around the sides of the fingerprint sensor package, while leaving the connection surface of the fingerprint sensor package uncovered.

公开(公告)号：US11157714B2

公开(公告)日：2021-10-26

申请号：US17055827

申请日：2019-05-23

Applicant: Fingerprint Cards AB

Inventor： Troels Bjerre ,  Samuel Löfström

IPC: G06K9/00 ,  G06T7/30 ,  G06F3/01 ,  G06T7/20

Abstract: A method for determining a finger motion on a fingerprint sensor comprising a sensing area, the method comprises: receiving a finger on the sensing area of the fingerprint sensor; when an amount of sensor area coverage caused by the finger touching the sensing area is below a coverage threshold, acquiring images of a first type using a first image acquisition setting with the fingerprint sensor, when the amount of sensor area coverage is equal to or exceeds the coverage threshold, acquiring images of a second type using a second image acquisition setting with the fingerprint sensor, and determining a present motion of the finger on the fingerprint sensor based on the first type of images or the second type of images depending on a present amount of sensor area coverage.

公开(公告)号：US20210326567A1

公开(公告)日：2021-10-21

申请号：US17273945

申请日：2018-09-12

Applicant: Fingerprint Cards AB

Inventor： Jun LIU ,  René NILSSON ,  Hans MARTINSSON ,  Ehsan HASHEMI

IPC: G06K9/00 ,  G06K9/42

Abstract: The invention relates to a method of reconstructing a fingerprint image from a plurality of fingerprint subimages captured by an optical microlens array fingerprint sensor, and a sensor system performing the method. In an aspect, a method of reconstructing a fingerprint image from a plurality of fingerprint subimages captured by an optical microlens array fingerprint sensor arranged under a touch-display of a device is provided. The method comprises capturing an image of a fingerprint with the fingerprint sensor, extracting, from the captured fingerprint image, a fingerprint subimage for each microlens in the array, normalizing the corrected fingerprint subimages with corresponding subimages of a uniformity calibration image with known uniformity properties, rotating the normalized fingerprint subimages 180 degrees while maintaining their relative position with respect to the captured fingerprint image from which the fingerprint subimages are extracted, and combining the rotated and normalized fingerprint subimages into a fingerprint image.

公开(公告)号：US11068733B2

公开(公告)日：2021-07-20

申请号：US16765694

申请日：2018-11-14

Applicant: Fingerprint Cards AB

Inventor： René Nilsson

IPC: G06K9/00 ,  G06K9/20 ,  G06K9/46 ,  H04N5/225

Abstract: There is provided a biometric imaging system comprising a display panel. The display panel in turn comprises: a plurality of display pixels configured to emit visible light and controllable to form an image in the display; and a plurality of non-visible light emitting elements configured to emit linearly polarized non-visible light; a camera configured to receive polarized non-visible light having an orientation which is rotated with respect to the emitted linearly polarized light; and control circuitry configured to: activate the plurality of non-visible light emitting elements to emit linearly polarized light towards a biometric object; and control the camera to capture an image based on light reflected by the biometric object having a polarization which is rotated with respect to the emitted linearly polarized light.

公开(公告)号：US20210209324A1

公开(公告)日：2021-07-08

申请号：US17058943

申请日：2019-05-27

Applicant: Fingerprint Cards AB

Inventor： Karl LUNDAHL ,  Hanna NILSSON ,  Adam BENSON ,  Martin GRIP

IPC: G06K9/00 ,  A61B5/1172 ,  G01S15/89

Abstract: An acoustic biometric imaging system comprising: a transparent device member having a first face to be touched by a finger surface of a user, and a second face opposite the first face, the transparent device member having a first acoustic impedance; a first ultrasonic transducer acoustically coupled to the second face of the transparent device member in a first transducer region for receiving acoustic signals conducted by the transparent device member from a finger touch region laterally spaced apart from the first transducer region, the first ultrasonic transducer having a second acoustic impedance; and an opaque masking layer arranged between the transparent device member and the first ultrasonic transducer in the first transducer region, the opaque masking layer having a third acoustic impedance between the first acoustic impedance and the second acoustic impedance.

公开(公告)号：US11042721B2

公开(公告)日：2021-06-22

申请号：US16661487

申请日：2019-10-23

Applicant: FINGERPRINT CARDS AB

Inventor： Roy Hansen

IPC: G06K9/00 ,  G10K11/34 ,  G06K9/20

Abstract: The present disclosure relates to an ultrasonic fingerprint sensor comprising an array of ultrasonic transducers, one microcontroller unit (MCU) configured for obtaining a configuration of the transducers, and a plurality of parallel mixed-signal Application-Specific Integrated Circuits (ASIC), each configured to be communicatively connected with the MCU and for Analogue-Digital (AD) conversion of analogue signals from the transducers to digital data and comprising a respective data storage for storing said digital data. The sensor also comprises, for each of the mixed-signal ASICs, a plurality of parallel front-end ASICs, each configured to be communicatively connected with said mixed-signal ASIC and for controlling a respective group of the transducers in accordance with the obtained configuration.

公开(公告)号：US20210173501A1

公开(公告)日：2021-06-10

申请号：US16983788

申请日：2020-08-03

Applicant: Fingerprint Cards AB

Inventor： Andreas LARSSON ,  Frank RIEDIJK

IPC: G06F3/044 ,  G06F3/041 ,  G06K9/00 ,  G06F21/32 ,  G11C11/419

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; a reference signal source configured to provide a reference signal; and read-out circuitry coupled to each read-out line in the plurality of read-out lines and to the reference signal source, the read-out circuitry being configured to acquire a read-out signal via a read-out line connected to a selected pixel element, when the selected pixel element provides the sensing signal; acquire a reference signal from the reference signal source; form a corrected read-out signal for the selected pixel element based on the read-out signal and the reference signal; and provide corrected read-out signals.

公开(公告)号：US11030433B2

公开(公告)日：2021-06-08

申请号：US16497118

申请日：2018-12-10

Applicant: Fingerprint Cards AB

Inventor： René Nilsson ,  Hans Martinsson ,  Ehsan Hashemi

IPC: G06K9/00 ,  G06K9/20

Abstract: There is provided a biometric imaging device configured to be arranged under an at least partially transparent display panel and configured to capture an image of an object in contact with an outer surface of the display panel. The biometric imaging device comprises: an image sensor comprising a photodetector pixel array; a transparent substrate arranged to cover the image sensor; an opaque layer covering an upper surface of the transparent substrate, wherein the opaque layer further comprises a plurality of separate openings; and a plurality of microlenses, each microlens being arranged in alignment with a respective opening of the opaque layer; wherein each microlens is configured to redirect light through the transparent substrate and onto a subarray of pixels in the photodetector pixel array.

公开(公告)号：US11023702B2

公开(公告)日：2021-06-01

申请号：US16512845

申请日：2019-07-16

Applicant: Fingerprint Cards AB

Inventor： Nils Lundberg ,  Zhimin Mo ,  Mats Slottner

IPC: G06K9/00 ,  G06K19/073

Abstract: There is provided a fingerprint sensing module comprising a fingerprint sensor device having a sensing array arranged on a first side of the device, the sensing array comprising an array of fingerprint sensing elements. The fingerprint sensor device also comprises connection pads for connecting the fingerprint sensor device to external circuitry. The fingerprint sensing module further comprises a fingerprint sensor device cover structure arranged to cover the fingerprint sensor device, the cover structure having a first side configured to be touched by a finger, thereby forming a sensing surface of the sensing module, and a second side facing the sensing array, wherein the cover structure comprises conductive traces for electrically connecting the fingerprint sensor module to external circuitry, and wherein a surface area of the cover structure is larger than a surface area of the sensor device. Moreover, the fingerprint sensor device comprises wire-bonds electrically connecting the connection pads of the fingerprint sensing device to the conductive traces of the cover structure.