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公开(公告)号：US09672401B2
公开(公告)日：2017-06-06
申请号：US15172930
申请日：2016-06-03
Applicant: Fingerprint Cards AB
Inventor： Frank Robert Riedijk , Hans Thörnblom
CPC classification number: G06K9/00013 , G06F3/016 , G06F3/0338 , G06F3/041 , G06F3/0416 , G06F3/044 , G06F2203/04105 , G06K9/0002 , H04N5/23241 , H04N5/3765 , H04N5/378
Abstract: A fingerprint sensing system comprises a sensor array with a plurality of sensing structures and read-out circuitry connectable to each of the sensing structures, and power supply circuitry arranged to provide to the read-out circuitry a substantially constant supply voltage being a difference between a high potential and a low potential. The fingerprint sensing system is configured in such a way that the low potential and the high potential are variable while substantially maintaining the supply voltage, and the read-out circuitry is connectable to each of the sensing structures in such a way that a variation in the low potential and the high potential while substantially maintaining the supply voltage results in a change of the charge carried by a sensing structure connected to the read-out circuitry. The change in charge is indicative of a capacitive coupling between the sensing structure and the finger.
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公开(公告)号：US20170098109A1
公开(公告)日：2017-04-06
申请号：US15176622
申请日：2016-06-08
Applicant: Fingerprint Cards AB
Inventor： David Carling , Hans Thörnblom
IPC: G06K9/00
CPC classification number: G06K9/0002 , G06K9/001
Abstract: The present invention relates to a fingerprint sensing device comprising an array of sensing elements; readout circuitry connected to the array of sensing elements; and finger detecting circuitry for detecting if a finger candidate is touching the sensing surface of the fingerprint sensing device. The fingerprint sensing device is controllable between an active state and an inactive state. When the fingerprint sensing device is in the inactive state, the finger detecting circuitry is configured to provide a finger lost signal for indicating when the finger candidate no longer touches the sensing surface of the fingerprint sensing device.
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公开(公告)号：US20170091525A1
公开(公告)日：2017-03-30
申请号：US15347892
申请日：2016-11-10
Applicant: FINGERPRINT CARDS AB
CPC classification number: G06K9/00087 , G06K9/0002 , G06K9/00067 , G06K9/40 , G06K2009/00939 , G06K2209/00 , G06T5/00 , G06T5/002 , G06T2207/10004 , G06T2207/30196
Abstract: The present invention generally relates to a method for removing disturbances in an image captured by a fingerprint sensor, and specifically to reduction of noise in an acquired fingerprint image by incorporating the sensing principle into the applied method for noise reduction, wherein the noise reduced image is used for determining a representation of a fingerprint pattern. Advantages with the invention include enhanced determination of fingerprint patterns from fingerprint images captured using a fingerprint sensor. The invention also relates to a corresponding electronic device and to a computer program product.
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公开(公告)号：US20160260225A1
公开(公告)日：2016-09-08
申请号：US15041656
申请日：2016-02-11
Applicant: Fingerprint Cards AB
Inventor： Hans Thörnblom , Eric Setterberg
CPC classification number: G06K9/00087 , G06F3/03547 , G06F3/0383 , G06F2203/0338 , G06K9/00006
Abstract: The present invention relates to a method of estimating a finger movement direction of a finger, comprising the steps of: a) acquiring a reference fingerprint image; b) acquiring at least one candidate fingerprint image at each acquisition time in a time sequence of acquisition times; c) determining, for each of the acquisition times, a match parameter value for each of a plurality of candidate finger movement directions, the match parameter value being indicative of a correlation between a reference fingerprint image portion and a candidate fingerprint image portion corresponding to displacement in the candidate finger movement direction; d) determining, for each of the candidate finger movement directions, a local extremum match parameter value indicating a maximum correlation for the time sequence of acquisition times; and e) estimating the finger movement based on an evaluation of the determined local extremum match parameters.
Abstract translation: 本发明涉及一种估计手指的手指移动方向的方法，包括以下步骤：a）获取参考指纹图像; b）在获取时间的时间序列中在每个获取时间获取至少一个候选指纹图像; c）为每个获取时间确定针对多个候选手指移动方向中的每一个的匹配参数值，所述匹配参数值指示参考指纹图像部分与对应于位移的候选指纹图像部分之间的相关性 在候选手指移动方向; d）针对每个候选手指移动方向，确定指示获取时间的时间序列的最大相关性的局部极值匹配参数值; 以及e）基于所确定的局部极值匹配参数的评估来估计手指移动。
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公开(公告)号：US11586717B2
公开(公告)日：2023-02-21
申请号：US16613326
申请日：2018-05-23
Applicant: FINGERPRINT CARDS AB
Inventor： Hans Thörnblom , Eric Setterberg , Lars Puggaard Bøgild Christensen , Søren Skovgaard Christensen , Anders Ø. Nielsen
Abstract: The present disclosure generally relates to a method for authenticating a user using an electronic device, where the electronic device comprises a fingerprint sensor as well as a first and a second control unit. Preferably, the first control unit comprises a secure element and/or a secure block adapted to provide a secure processing environment. The present disclosure also relates to a corresponding electronic device and to a computer program product.
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Patent Agency Ranking
公开(公告)号：US20180173921A1
公开(公告)日：2018-06-21
申请号：US15724603
申请日：2017-10-04
Applicant: Fingerprint Cards AB
Inventor： Fredrik Ramberg , Hans Thörnblom
CPC classification number: G06K9/0002 , G06F3/0416 , G06F3/044 , G06K9/00053
Abstract: There is provided a method for controlling a capacitive fingerprint sensing device for sensing a fingerprint pattern of a finger, the capacitive fingerprint sensor comprising a plurality of sensing elements. Each sensing element comprises a protective dielectric top layer to be touched by the finger, an electrically conductive sensing structure arranged underneath the top layer, sensing circuitry for providing an analog sensing signal indicative of a distance between the finger and the sensing structure. The fingerprint sensing device further comprises timing circuitry configured to control a timing of a drive signal, the drive signal being configured to provide a change in potential difference between the finger and the sensing structure. The method comprises forming a drive signal comprising a sequence of pulses, wherein a delay between consecutive pulses is controllable by said timing circuitry. There is also provided a sensing device configured to perform the above described method.
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公开(公告)号：US20180032789A1
公开(公告)日：2018-02-01
申请号：US15728633
申请日：2017-10-10
Applicant: FINGERPRINT CARDS AB
Inventor： Sebastian Weber , Hans Thörnblom
IPC: G06K9/00
CPC classification number: G06K9/00026
Abstract: The present invention generally relates to a method for forming a fingerprint using a fingerprint sensing system, and specifically to the possibility of allowing the formation of a fingerprint when only separated portions of the fingerprint is available. The invention also relates to the corresponding fingerprint sensing system and to a computer program product.
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公开(公告)号：US20170330020A1
公开(公告)日：2017-11-16
申请号：US15456803
申请日：2017-03-13
Applicant: Fingerprint Cards AB
Inventor： Mats Tuneld , Fredrik Ramberg , Hans Thörnblom
IPC: G06K9/00
CPC classification number: G06K9/00087 , G06K9/00993 , G06K9/036
Abstract: The invention relates to a method of authenticating a user by means of a fingerprint authentication system comprising a fingerprint sensing arrangement and authentication circuitry. The method comprises the steps of acquiring a first candidate fingerprint image; acquiring a second candidate fingerprint image; processing, while acquiring the second candidate fingerprint image, the first candidate fingerprint image by the authentication circuitry; and evaluating a result of the processing. When the evaluation indicates that successful authentication is not likely based on the first candidate fingerprint image, the user is authenticated based on the second candidate fingerprint image.
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公开(公告)号：US09779281B2
公开(公告)日：2017-10-03
申请号：US15347892
申请日：2016-11-10
Applicant: FINGERPRINT CARDS AB
CPC classification number: G06K9/00087 , G06K9/0002 , G06K9/00067 , G06K9/40 , G06K2009/00939 , G06K2209/00 , G06T5/00 , G06T5/002 , G06T2207/10004 , G06T2207/30196
Abstract: The present invention generally relates to a method for removing disturbances in an image captured by a fingerprint sensor, and specifically to reduction of noise in an acquired fingerprint image by incorporating the sensing principle into the applied method for noise reduction, wherein the noise reduced image is used for determining a representation of a fingerprint pattern. Advantages with the invention include enhanced determination of fingerprint patterns from fingerprint images captured using a fingerprint sensor. The invention also relates to a corresponding electronic device and to a computer program product.
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公开(公告)号：US09646193B2
公开(公告)日：2017-05-09
申请号：US14951056
申请日：2015-11-24
Applicant: FINGERPRINT CARDS AB
Inventor： Eric Setterberg , Hamid Sarve , Hans Thörnblom , Kenneth Jonsson
CPC classification number: G06K9/00087 , G06F1/1684 , G06F3/044 , G06K9/0002 , G06K9/00067
Abstract: A method of authenticating a candidate fingerprint by means of an electronic device comprising a touch sensor; and a fingerprint sensor. The method comprises the steps of: acquiring at least one touch sensor signal indicative of a sub-area of the touch sensor being touched by the candidate finger; acquiring at least one fingerprint image of the candidate fingerprint; retrieving a stored enrollment representation of the enrolled fingerprint of the enrolled finger; determining an authentication representation of the candidate fingerprint based on the fingerprint image; and determining an authentication result based on the authentication representation, the stored enrollment representation, and the at least one touch sensor signal.
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