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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：US20170344780A1
公开(公告)日：2017-11-30
申请号：US15484554
申请日：2017-04-11
Applicant: Fingerprint Cards AB
Inventor： Frank RIEDIJK , Hans THÖRNBLOM , Daniel ANDERSSON
IPC: G06K9/00
CPC classification number: G06K9/0002 , G06K9/00053
Abstract: There is provided a capacitive fingerprint sensing device for sensing a fingerprint pattern of a finger, the capacitive fingerprint sensor comprising: a protective dielectric top layer to be touched by the finger; a two-dimensional array of electrically conductive sensing structures arranged underneath the top layer; readout circuitry coupled to each of the electrically conductive sensing structures to receive a sensing signal indicative of a distance between the finger and the sensing structure, the readout circuitry comprising a plurality of signal amplifiers arranged underneath the array of electrically conductive sensing structures, wherein a number of signal amplifiers is lower than a number of sensing structures; and selection circuitry coupling each of the sensing structures to at least one signal amplifier and configured to select a sensing structure to be coupled to a corresponding signal amplifier. There is also provided a method for controlling a fingerprint sensing device.
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Patent Agency Ranking
3.发明申请公开(公告)号：US20180137324A1
公开(公告)日：2018-05-17
申请号：US15806834
申请日：2017-11-08
Applicant: Fingerprint Cards AB
Inventor： Frank RIEDIJK , Wouter BREVET , Hans THÖRNBLOM , Christer JANSSON
CPC classification number: G06K9/001 , G01D5/24 , G06K9/0002 , G06K9/00067
Abstract: A method of determining a representation of a fingerprint pattern of a finger using a fingerprint sensor comprising a two-dimensional measuring arrangement including a plurality of measuring elements, each comprising a finger electrode spaced apart from the finger by a dielectric structure. For each measurement position, the method comprises the steps of: providing a first measuring element configuration with an elongated first measuring arrangement portion having a first principal direction of extension; and a first peripheral measuring arrangement portion; acquiring a first measurement value for the measurement position; providing a second measuring element configuration having an elongated second measuring arrangement portion having a second principal direction of extension; and a second peripheral measuring arrangement portion; and acquiring a second measurement value for the measurement position. The representation of the fingerprint pattern is determined based on the first measurement value and the second measurement value for each of the measurement positions.
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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.
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公开(公告)号：US20190197283A1
公开(公告)日：2019-06-27
申请号：US16141368
申请日：2018-09-25
Applicant: Fingerprint Cards AB
Inventor： Frank RIEDIJK , Wouter BREVET
CPC classification number: G06K9/0002 , G06F21/32 , G06K9/00053 , G06K9/28
Abstract: A fingerprint sensing system for sensing a fingerprint pattern of a finger, comprising: a sensor array including a plurality of electrically conductive sensing structures; read-out circuitry connected to each of the sensing structures for providing sensing signals indicative of a capacitive coupling between the sensing structures and the finger; first signal providing circuitry for providing a first time-varying voltage signal to at least a portion of the sensor array; at least one electrically conductive edge-compensating structure arranged outside the sensor array; and second signal providing circuitry for providing a second time-varying voltage signal to the at least one edge-compensating structure.
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公开(公告)号：US20220075977A1
公开(公告)日：2022-03-10
申请号：US17467745
申请日：2021-09-07
Applicant: Fingerprint Cards AB
Inventor： Frank RIEDIJK , Wouter BREVET , Hans THÖRNBLOM
Abstract: A fingerprint sensor comprising a plurality of electrically conductive sensing structures arranged in a sensing plane for capacitively sensing a fingerprint of a finger placed on the finger receiving surface of the fingerprint sensor arrangement, the plurality of electrically conductive sensing structures including: a first set of electrically conductive sensing structures, each sensing structure in the first set of electrically conductive sensing structures covering an area in the sensing plane being within a first area range; and a second set of electrically conductive sensing structures, each sensing structure in the second set of electrically conductive sensing structures covering an area in the sensing plane being within a second area range only including areas greater than the areas within the first area range.
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公开(公告)号：US20220075976A1
公开(公告)日：2022-03-10
申请号：US17467633
申请日：2021-09-07
Applicant: Fingerprint Cards AB
Inventor： Frank RIEDIJK , David CARLING , Hans THÖRNBLOM , Wouter BREVET
Abstract: A fingerprint sensor comprising a plurality of electrically conductive sensing structures arranged in a sensing plane for capacitively sensing a fingerprint of a finger; and measurement circuitry coupled to the plurality of electrically conductive sensing structures for providing measurement signals indicative of a capacitive coupling between each sensing structure in the plurality of electrically conductive sensing structures and the finger, wherein the measurement circuitry is arranged to: provide, using a first measurement circuitry configuration, a first set of measurement signals from a first set of sensing structures; and provide, using a second measurement circuitry configuration different from the first measurement circuitry configuration, a second set of measurement signals from a second set of sensing structures.
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