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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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2.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：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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