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公开(公告)号：US11308729B2
公开(公告)日：2022-04-19
申请号：US16979246
申请日：2019-03-05
Applicant: Fingerprint Cards AB
Inventor： René Nilsson , Hans Martinsson , Ehsan Hashemi , Farzan Ghavanini
Abstract: A biometric imaging device configured to capture an image of an object in contact with an outer surface of the imaging device, comprising: an at least partially transparent display panel comprising a repeating transmission pattern defined by an array of display unit cells, each display unit cell having the same transmission pattern; an image sensor comprising a photodetector pixel array arranged underneath the display panel; and a collimator layer arranged between the display panel and the image sensor that comprises a plurality of first collimating structures having a first collimator opening size and a plurality of second collimating structures having a second collimator opening size different from the first collimator opening size, wherein the respective collimator opening size and relative location of the first and second collimating structure in relation to the display unit cell is based on the transmission pattern of the display unit cell.
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公开(公告)号：US11847855B2
公开(公告)日：2023-12-19
申请号：US17425138
申请日：2019-12-11
Applicant: Fingerprint Cards AB
Inventor： Hans Martinsson
IPC: G06V40/13 , H04N25/42 , G06F21/32 , G06V10/10 , G06V10/147
CPC classification number: G06V40/1329 , G06F21/32 , G06V10/147 , G06V10/17 , G06V40/1318 , H04N25/42 , G06F2218/02
Abstract: The present invention relates to a method of configuring an optical biometric imaging device comprising a photodetector pixel array, the method comprising: acquiring a biometric image of a biometric object using a first binning setting for binning of detection signals from subarrays of the photodetector pixels into a single pixel value; determining a measure indicative of the feature resolution of the biometric image; and determining, when the measure indicates that the feature resolution is below a feature resolution threshold, a second binning setting adapted to provide a higher feature resolution compared to the feature resolution of the biometric image.
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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.
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Patent Agency Ranking
公开(公告)号：US10325134B2
公开(公告)日：2019-06-18
申请号：US16159029
申请日：2018-10-12
Applicant: Fingerprint Cards AB
Inventor： Markus Andersson , Mikael Danielsson , René Nilsson , Hans Martinsson
Abstract: A method of initiating a calibration operation of an optical fingerprint sensing device comprising an array of photosensitive elements for capturing a fingerprint pattern, the method comprising acquiring information indicative of a change of an environmental parameter influencing the operation of the fingerprint sensing device; and if the change is larger than a predetermined threshold value, performing a calibration operation of the fingerprint sensing device. There is also provided a fingerprint sensing device configured to perform the method, and a consumer electronic device comprising such a fingerprint sensing device.
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5.发明授权公开(公告)号：US11508181B2
公开(公告)日：2022-11-22
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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公开(公告)号：US20190050620A1
公开(公告)日：2019-02-14
申请号：US16159029
申请日：2018-10-12
Applicant: Fingerprint Cards AB
Inventor： Markus Andersson , Mikael Danielsson , René Nilsson , Hans Martinsson
Abstract: A method of initiating a calibration operation of an optical fingerprint sensing device comprising an array of photosensitive elements for capturing a fingerprint pattern, the method comprising acquiring information indicative of a change of an environmental parameter influencing the operation of the fingerprint sensing device; and if the change is larger than a predetermined threshold value, performing a calibration operation of the fingerprint sensing device. There is also provided a fingerprint sensing device configured to perform the method, and a consumer electronic device comprising such a fingerprint sensing device.
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公开(公告)号：US11301664B2
公开(公告)日：2022-04-12
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：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
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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