公开(公告)号：US20200285882A1

公开(公告)日：2020-09-10

申请号：US16753762

申请日：2018-10-02

Applicant: Fingerprint Cards AB

Inventor： Søren SKOVGAARD CHRISTENSEN ,  Morten WITH PEDERSEN

IPC: G06K9/40 ,  G06K9/00

Abstract: The present disclosure relates a method for fingerprint image enhancement comprising applying a first low pass filter and a first weight to raw fingerprint image data to produce a first filtered fingerprint image data set. Applying a second low pass filter and a second weight to the raw fingerprint image data to produce a second filtered fingerprint image data set. Filter coefficients of the second filter are different from filter coefficients of the first filter. The first filtered fingerprint image data set and the second filtered fingerprint image data set are combined to produce a final enhanced fingerprint image. The disclosure also relates to a fingerprint sensing system and to an electronic device comprising a fingerprint sensing system.

公开(公告)号：US20200279089A1

公开(公告)日：2020-09-03

申请号：US16645959

申请日：2018-09-17

Applicant: FINGERPRINT CARDS AB

Inventor： Karl LUNDAHL ,  Hanna NILSSON ,  Martin GRIP

IPC: G06K9/00 ,  H01L41/047 ,  H01L41/311 ,  B06B1/06

Abstract: A method of manufacturing ultrasonic transducer devices, comprising fabricating an ultrasonic transducer panel; and dividing the ultrasonic transducer panel into ultrasonic transducer devices. Fabricating the ultrasonic transducer panel includes: providing a first carrier; arranging a plurality of piezoelectric elements spaced apart on the first carrier; applying a dielectric material on the plurality of piezoelectric elements to embed each piezoelectric element in the plurality of piezoelectric elements in the dielectric material, thereby forming a piezoelectric element device layer on the first carrier; thinning the piezoelectric element device layer, resulting in an exposed first side of each piezoelectric element in the plurality of piezoelectric elements; forming a first electrode layer on the piezoelectric element device layer, the first electrode layer including a first transducer electrode on the exposed first side of each piezoelectric element in the piezoelectric element device layer; and separating the piezoelectric element device layer from the first carrier.

公开(公告)号：US20200265203A1

公开(公告)日：2020-08-20

申请号：US16757951

申请日：2018-10-24

Applicant: FINGERPRINT CARDS AB

Inventor： Mats TUNELD ,  Olis OLOFSSON ,  Bengt LINDOFF

IPC: G06K9/00 ,  G06F21/32 ,  G06F3/041 ,  G06F3/0488

Abstract: The present disclosure relates to a method of controlling an electronic device, the electronic device comprising a fingerprint sensor. The present disclosure also relates to a corresponding electronic device and to a computer program product.

公开(公告)号：US10733413B2

公开(公告)日：2020-08-04

申请号：US16365804

申请日：2019-03-27

Applicant: Fingerprint Cards AB

Inventor： René Nilsson ,  Hans Martinsson

IPC: G06K9/00 ,  G06F3/042 ,  G06F3/0488

Abstract: The invention relates to an optical biometric imaging device configured to capture an image of an object in contact with an outer surface of the biometric imaging device, the biometric imaging device comprising: an image sensor comprising a photodetector pixel array; a transparent substrate arranged to cover the image sensor; a transmission mask arranged to cover the transparent substrate, wherein the transmission mask comprises a plurality of openings, the openings forming a coded aperture configured to project a coded image of an object in contact with the outer surface of the imaging device onto the image sensor; and image sensor circuitry configured to capture an image corresponding to the coded image projected onto the image sensor.

公开(公告)号：US10726233B2

公开(公告)日：2020-07-28

申请号：US16059881

申请日：2018-08-09

Applicant: FINGERPRINT CARDS AB

Inventor： Lynn Russell Kern ,  Mark Harris ,  Joel Parkinson

IPC: G06K9/00 ,  G06F3/042 ,  G06F3/041 ,  G06K9/03 ,  G09G5/02

Abstract: A method for testing a sensor of a device includes: displaying a test pattern on a display of the device; reflecting, by a reflector disposed over the display, at least a portion of the displayed test pattern; and capturing, by the sensor, a test pattern frame using the displayed test pattern and the reflector.

公开(公告)号：US20200226340A1

公开(公告)日：2020-07-16

申请号：US16830871

申请日：2020-03-26

Applicant: Fingerprint Cards AB

Inventor： Kenneth JONSSON ,  David TINGDAHL

IPC: G06K9/00

Abstract: The present invention generally relates to a method for authenticating a finger of a user of an electronic device comprising a fingerprint sensor for sensing a fingerprint pattern, the method comprising the steps of: acquiring a candidate fingerprint image; determining, based on the candidate fingerprint image, a humidity level indication indicative of the humidity level of the finger; performing an authentication pre-process based on the humidity level indication; performing a fingerprint authentication process based on the pre-process to authenticate the user.

公开(公告)号：US20200210667A1

公开(公告)日：2020-07-02

申请号：US16623443

申请日：2018-08-21

Applicant: Fingerprint Cards AB

Inventor： Hanna NILSSON ,  Adam BENSON ,  Karl LUNDAHL

IPC: G06K9/00 ,  H01L27/01

Abstract: A method for manufacturing a fingerprint sensor device. The method comprises providing a fingerprint sensor chip, arranging the fingerprint sensor chip on a carrier, depositing a cover layer on the fingerprint sensor chip, the cover layer comprising a polarizable material; moving a top electrode into contact with a top surface of the cover layer; and applying a voltage between the top electrode and a bottom electrode located below the cover layer and comprised in a material stack between the bottom of the carrier and the cover layer, creating an electric field in the cover layer, thereby poling the cover layer such that a dielectric constant of the cover layer in a direction perpendicular to the sensing array is higher than a dielectric constant in a direction parallel to the sensing array, thereby forming a cover layer having an anisotropic dielectric constant.

公开(公告)号：US20200127824A1

公开(公告)日：2020-04-23

申请号：US16605828

申请日：2019-02-08

Applicant: FINGERPRINT CARDS AB

Inventor： Christian GEHRMANN ,  Steven POPE

IPC: H04L9/08 ,  G06F21/32 ,  H04L9/32

Abstract: Methods and devices for updating biometric template protection keys can include updating at least one stored feature transformation key with which a set of biometric data of a user initially has been transformed at a first client device at which the biometric data of the user was captured and enrolled with a network node, which set of transformed biometric data of the user is stored at a biometric data verification node that does not have access to the feature transformation key. The method comprises generating random data, computing at least one new feature transformation key based on said random data, replacing the at least one stored feature transformation key with the computed at least one new feature transformation key, and transmitting the generated random data to the biometric data verification node, which uses the generated random data to update the at least one set of transformed biometric data.

公开(公告)号：US10586031B2

公开(公告)日：2020-03-10

申请号：US15807812

申请日：2017-11-09

Applicant: Fingerprint Cards AB

Inventor： Markus Andersson ,  Olis Olofsson

IPC: G06F21/32 ,  G06K9/00 ,  G06F3/0346

Abstract: The present invention relates to an electronic device. In particular, the present invention relates to an electronic device comprising a first and a second biometric sensor and processing circuitry arranged to authenticate the user of the electronic device. The present invention also relates to a corresponding method and computer program for authenticating the user of an electronic device.

公开(公告)号：US20200065554A1

公开(公告)日：2020-02-27

申请号：US16609650

申请日：2018-04-25

Applicant: FINGERPRINT CARDS AB

Inventor： René NILSSON ,  Eric SETTERBERG

IPC: G06K9/00 ,  G06K9/03 ,  G06F21/32 ,  G06F21/45

Abstract: The invention relates to a method of a fingerprint sensing system arranged in an electronic device of capturing fingerprint data of a user contacting a fingerprint sensor of the fingerprint sensing system, and a fingerprint sensing system performing the method.