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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
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.
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公开(公告)号：US20200293757A1
公开(公告)日：2020-09-17
申请号：US16765735
申请日：2018-11-13
Applicant: Fingerprint Cards AB
Inventor： René NILSSON
Abstract: There is provided a biometric imaging system comprising: a display panel comprising: a plurality of display pixels controllable to form an image in the display and a plurality of individually controllable non-visible light emitting elements configured to the emit non-visible light, the non-visible light emitting elements being configured to form a controllable spatial irradiation pattern within an irradiation zone defined by the plurality of non-visible light emitting elements; and a control unit. The control unit is configured to identify a biometric object facing the display panel; determine a relative location of the biometric object in the irradiation zone; control the plurality of non-visible light emitting elements to form a spatial radiation pattern based on the location of the biometric object in relation to the display panel.
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3.发明申请公开(公告)号：US20210312157A1
公开(公告)日：2021-10-07
申请号：US17272577
申请日：2018-09-05
Applicant: Fingerprint Cards AB
Inventor： Jun LIU , Ehsan HASHEMI , Hans MARTINSSON , René NILSSON , Farzan GHAVANINI
Abstract: There is 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 and image sensor circuitry configured to capture an image of the object in contact with the outer surface of the imaging device; the image sensor comprising a first electrically conductive structure arranged adjacent to an active sensing area of the photodetector pixel array; a display panel arranged on top of and at a distance from the image sensor, the display panel comprising a second electrically conductive structure on a bottom side of the display panel and arranged to face the first electrically conductive structure of the image sensor; and capacitive readout circuitry arranged and configured to detect a capacitance between the first electrically conductive structure and the second electrically conductive structure.
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公开(公告)号：US20200380237A1
公开(公告)日：2020-12-03
申请号：US16497118
申请日：2018-12-10
Applicant: Fingerprint Cards AB
Inventor： René NILSSON , Hans MARTINSSON , Ehsan HASHEMI
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.
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5.发明申请公开(公告)号：US20220130167A1
公开(公告)日：2022-04-28
申请号：US17431223
申请日：2019-12-17
Applicant: Fingerprint Cards AB
Inventor： René NILSSON , Hans MARTINSSON , Arne HUSTH
Abstract: Method for determining image reconstruction parameters in an optical biometric imaging device comprising a plurality of microlenses forming a microlens array and an image sensor arranged to receive light having passed through the microlenses, the method comprising: by the image sensor, capturing a plurality of sub-images together representing an image of a biometric object in contact with a sensing surface of the biometric imaging device, each sub-image corresponding to a respective microlens; and determining a demagnification factor based on at least a subset of the plurality of sub-images.
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Patent Agency Ranking
公开(公告)号：US20210357603A1
公开(公告)日：2021-11-18
申请号：US16757808
申请日：2018-10-23
Applicant: FINGERPRINT CARDS AB
Inventor： Farzan GHAVANINI , Jonas TALLHAGE , Frank RIEDIJK , René NILSSON , Wieslaw BICZ , Agnieszka BICZ
Abstract: A method for controlling a plurality of ultrasonic transducers in a fingerprint sensing system that comprises a cover plate having a sensing surface configured to be touched by a finger, and a plurality of ultrasonic transducers located at the periphery of the cover plate and configured to transmit an acoustic signal propagating in the cover plate, receive an ultrasonic signal having interacted with an object in contact with the sensing surface, and to determine properties of the object based on the received ultrasonic signal. The method comprises: in response to a first input, controlling the plurality of transducers such that at least a portion of the sensing surface has a first feature detection resolution; and in response to a second input, controlling the plurality of transducers such that at least a portion of the sensing surface has a second feature detection resolution, different from the first feature detection resolution.
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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
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.
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公开(公告)号：US20210374379A1
公开(公告)日：2021-12-02
申请号：US17286937
申请日：2019-10-08
Applicant: Fingerprint Cards AB
Inventor： René NILSSON
IPC: G06K9/00 , H01L27/146
Abstract: An optical biometric imaging arrangement configured to be arranged under an at least partially transparent display panel, and configured to capture an image of an object located on an opposite side of the display panel, comprising: an image sensor comprising a photodetector pixel array; an array of light redirecting elements, each light redirecting element is configured to redirect light onto the pixel array, a color filter arranged between the array of light redirecting elements and the image sensor, the color filter comprising at least two color filter arrays of respective color filter elements being optically transmissive, a first color array comprising first color filter elements and a second color array comprising second color filter elements, the color filter arrays are arranged such that each photodetector pixel is at least partly covered by at least a first and a second color filter element.
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公开(公告)号：US20210209391A1
公开(公告)日：2021-07-08
申请号：US17056031
申请日：2019-06-05
Applicant: Fingerprint Cards AB
Inventor： Troels BJERRE , René NILSSON
Abstract: The present disclosure generally relates to a method of authenticating a user, using an electronic device comprising a fingerprint sensor, and more specifically to improvements in relation to how to acquiring an authentication fingerprint image for use in authenticating the user. The present disclosure also relates to a corresponding electronic device and to a computer program product.
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公开(公告)号：US20210019540A1
公开(公告)日：2021-01-21
申请号：US16765694
申请日：2018-11-14
Applicant: Fingerprint Cards AB
Inventor： René NILSSON
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.
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