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公开(公告)号：US09842245B1
公开(公告)日：2017-12-12
申请号：US15622638
申请日：2017-06-14
Applicant: Fingerprint Cards AB
Inventor： Eric Setterberg , Frank Riedijk
IPC: G06K9/00
CPC classification number: G06K9/0012 , G06K9/0002 , G06K9/00087
Abstract: The present invention relates to a method of controlling a fingerprint sensing system for liveness authentication. The method comprising acquiring a first set of sensing signals and a second set of sensing signals from a fingerprint sensor in two different operational modes and subsequently provide a liveness authentication signal based on the first set of sensing signals and the second set of sensing signals. The invention also relates to a fingerprint sensing system and an electronic device.
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公开(公告)号：US10482307B2
公开(公告)日：2019-11-19
申请号：US16141368
申请日：2018-09-25
Applicant: Fingerprint Cards AB
Inventor： Frank Riedijk , Wouter Brevet
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：US11538267B2
公开(公告)日：2022-12-27
申请号：US17467745
申请日：2021-09-07
Applicant: Fingerprint Cards AB
Inventor： Frank Riedijk , Wouter Brevet , Hans Thörnblom
IPC: G06V40/13 , G06V10/147 , H04M1/02
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：US11216633B2
公开(公告)日：2022-01-04
申请号：US16979300
申请日：2019-03-04
Applicant: Fingerprint Cards AB
Inventor： Lars Christensen , Hans Thörnblom , Frank Riedijk , Søren Skovgaard Christensen
Abstract: The present invention relates to providing a filtered fingerprint pattern signal indicative of a fingerprint pattern with a fingerprint sensing device comprising an array of sensing elements for sensing the fingerprint pattern. Each sensing element is configured to provide a sensing signal indicative of a local fingerprint pattern feature. The method comprises: receiving analog sensing signals from each of a set of sensing elements comprising at least four sensing elements, filtering the set of sensing signals to provide a set of filtered output signals each comprising a linear combination of the set of sensing signals in which each sensing signal has a respective coefficient. The coefficients in each linear combination sum up to zero, and wherein the linear combinations are different from each other. The set of filtered output signals are converted to a filtered digital sensing signal indicative of the user's fingerprint pattern.
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公开(公告)号：US09864895B1
公开(公告)日：2018-01-09
申请号：US15464582
申请日：2017-03-21
Applicant: Fingerprint Cards AB
Inventor： Andreas Larsson , Frank Riedijk , Hans Thörnblom
IPC: G06K9/00
CPC classification number: G06K9/0002 , G06K9/00087
Abstract: The present invention relates to a method of sensing a fingerprint pattern of a finger using a fingerprint sensing device. The method comprising: controlling a group of sensing elements to change a potential of a group of sensing structures comprised in said group of sensing elements; acquiring, in response to said variation in potential, a response signal from a finger detecting circuitry indicative of the capacitive coupling between the group of sensing structures and the finger detecting structure; comparing a variation in the response signal with a predefined threshold value; and providing a signal indicating that a finger is present when the variation in response signal is greater than the threshold value. The invention also relates to a corresponding fingerprint sensing device.
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Patent Agency Ranking
公开(公告)号：US11501554B2
公开(公告)日：2022-11-15
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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公开(公告)号：US10102412B2
公开(公告)日：2018-10-16
申请号：US15623800
申请日：2017-06-15
Applicant: Fingerprint Cards AB
Inventor： Frank Riedijk , Hans Thörnblom
IPC: G06K9/00
Abstract: A method of determining a physical property of a finger using a sensor comprising a two-dimensional measuring arrangement including a plurality of measuring elements, each defining a measuring element position in the measuring arrangement, and each comprising a finger electrode spaced apart from the finger by a dielectric structure. For each measuring element position, the method comprises the steps of performing a first sensing operation using a first capacitive configuration, acquiring a first measurement value for the first capacitive configuration, performing a second sensing operation using a second capacitive configuration, acquiring a second measurement value for the second capacitive configuration. The physical property of the finger is determined based on the first and second measurement values for each measuring element position.
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公开(公告)号：US20180137327A1
公开(公告)日：2018-05-17
申请号：US15623800
申请日：2017-06-15
Applicant: Fingerprint Cards AB
Inventor： Frank Riedijk , Hans THÖRNBLOM
IPC: G06K9/00
CPC classification number: G06K9/0002 , G06K9/00067
Abstract: A method of determining a physical property of a finger using a sensor comprising a two-dimensional measuring arrangement including a plurality of measuring elements, each defining a measuring element position in the measuring arrangement, and each comprising a finger electrode spaced apart from the finger by a dielectric structure. For each measuring element position, the method comprises the steps of performing a first sensing operation using a first capacitive configuration, acquiring a first measurement value for the first capacitive configuration, performing a second sensing operation using a second capacitive configuration, acquiring a second measurement value for the second capacitive configuration. The physical property of the finger is determined based on the first and second measurement values for each measuring element position.
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公开(公告)号：US09922231B1
公开(公告)日：2018-03-20
申请号：US15636105
申请日：2017-06-28
Applicant: Fingerprint Cards AB
Inventor： Frank Riedijk , Wouter Brevet , Lars Christensen , Søren Christensen , Michael Hansen
IPC: G06K9/00
CPC classification number: G06K9/0002 , G06K9/00067
Abstract: A method of determining a representation of a physical property of a finger using a finger sensing system comprising a two-dimensional measuring arrangement including a plurality of measuring elements, each defining a measuring element position in the measuring arrangement, and each comprising a finger electrode spaced apart from the finger by a dielectric structure. For each of the measuring element positions, the method comprises providing a measuring configuration in which the finger electrode of a sensing measuring element defining the measuring element position exhibits a sensing finger electrode potential; the finger electrode of a first different measuring element exhibits a first different finger electrode potential; and the finger electrode of a second different measuring element exhibits a second different finger electrode potential; acquiring a measurement value based on a sensing signal; and determining the representation of the physical property of the finger based on a plurality of measurement values.
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10.发明授权公开(公告)号：US11482033B2
公开(公告)日：2022-10-25
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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