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1.发明授权公开(公告)号：US11307635B2
公开(公告)日：2022-04-19
申请号：US16609573
申请日：2018-04-24
Applicant: FINGERPRINT CARDS AB
Inventor： Peter Almers , David Carling , Rolf Sundblad , Nicholas Weiner , Benjamin Willcocks
IPC: G06F1/32 , G06F1/3234 , G06F1/10 , G06F1/26 , G06F1/3206 , G06F11/30 , G06F21/32 , G06F21/60 , G06F21/62 , G06K9/00 , G06K19/07 , H04B5/00
Abstract: A method of controlling operation of a field-powered biometric device comprising biometric acquisition circuitry, processing circuitry controllable to transition between a first functional state having a first power consumption and a second functional state having a second power consumption lower than the first power consumption, and power management circuitry. The method comprises the steps of monitoring, by the power management circuitry, a property indicative of a supply voltage to the processing circuitry; controlling, when the monitored property indicates that the supply voltage has fallen to a first threshold voltage, the processing circuitry to transition from the first functional state to the second functional state; and controlling, when the monitored property indicates that the supply voltage has increased to a second threshold voltage higher than the first threshold voltage, the processing circuitry to transition from the second functional state to the first functional state.
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公开(公告)号：US09710690B1
公开(公告)日：2017-07-18
申请号：US15407617
申请日：2017-01-17
Applicant: Fingerprint Cards AB
Inventor： David Carling , Robert Hägglund , Emil Hjalmarson , Peter Nygren , Erik Säll
IPC: G06K9/00
CPC classification number: G06K9/0002 , G06K9/00087
Abstract: A fingerprint sensing system comprising a device connection interface, and a sensing arrangement including sensing structures, a read-out circuitry connected the sensing structures, and a sensing arrangement controller for controlling the sensing arrangement between at least a first sensing arrangement operational mode and a second sensing arrangement operational mode. The system further comprising supply circuitry connected to the sensing arrangement, and comprising a supply circuitry controller for controlling the supply circuitry between a first supply circuitry operational mode and a second supply circuitry operational mode in which modes different supply power is provided to the sensing arrangement. The supply circuitry controller transitions the supply circuitry between its modes in response to a power state signal indicative of a future transition of the sensing arrangement from the first operational mode to the second operational mode.
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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：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：US09971434B2
公开(公告)日：2018-05-15
申请号：US15359114
申请日：2016-11-22
Applicant: Fingerprint Cards AB
Inventor： Eric Setterberg , David Carling
CPC classification number: G06F3/041 , G06F3/0304 , G06F3/03547 , G06F2203/0338 , G06K9/00013 , G06K9/0008 , G06K9/00335 , G06K9/00355 , G06K9/52 , G06K9/6215 , G06K2009/3291
Abstract: A method of estimating a finger movement comprising acquiring a navigation evaluation image from each of at least three navigation subareas of a fingerprint sensor; determining, for each of the navigation evaluation images, a navigation-related property of the navigation evaluation image; evaluating the navigation-related properties to find a combination of at least a first navigation-related property and a second navigation-related property that fulfills a navigation requirement; and selecting at least a first navigation subarea related to the first navigation-related property and a second navigation subarea related to the second navigation-related property. The finger movement is then estimated using a sequence of first navigation images acquired using the first navigation subarea, and a sequence of second navigation images acquired using the second navigation subarea.
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Patent Agency Ranking
公开(公告)号：US09811708B2
公开(公告)日：2017-11-07
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：US09477868B1
公开(公告)日：2016-10-25
申请号：US15006503
申请日：2016-01-26
Applicant: Fingerprint Cards AB
Inventor： David Carling , Eric Setterberg , Hans Thörnblom
IPC: G06K9/00 , G06F3/0354
CPC classification number: G06K9/00013 , G06F3/0317 , G06F3/03547 , G06F3/038 , G06F3/044 , G06F3/04883 , G06F2203/0338 , G06K9/0002 , G06K9/6202
Abstract: A fingerprint-based navigation method using a finger navigation system comprising fingerprint sensing circuitry and navigation control circuitry. The method comprises the steps of: acquiring a series of navigation sequences of fingerprint images, and for each navigation sequence in the series of navigation sequences: determining an estimated momentary finger movement based on the navigation sequence of fingerprint images; determining at least one fingerprint image parameter value indicative of a fingerprint image status based on at least one fingerprint image in the navigation sequence of fingerprint images; and evaluating the fingerprint image status. The method further comprises the steps of determining a fingerprint sensing circuitry setting based on the evaluation; and providing the fingerprint sensing circuitry setting to the fingerprint sensing circuitry only during a time period between acquisition of a final fingerprint image in one navigation sequence and acquisition of a first fingerprint image in another, directly succeeding, navigation sequence.
Abstract translation: 一种使用手指导航系统的基于指纹的导航方法，其包括指纹感测电路和导航控制电路。 该方法包括以下步骤：获取指纹图像的一系列导航序列，以及针对一系列导航序列中的每个导航序列：基于指纹图像的导航序列确定估计的瞬间手指移动; 基于指纹图像的导航序列中的至少一个指纹图像来确定表示指纹图像状态的至少一个指纹图像参数值; 并评估指纹图像状态。 该方法还包括以下步骤：基于评估确定指纹感测电路设置; 以及仅在获取一个导航序列中的最终指纹图像和在另一个直接后续导航序列中获取第一指纹图像之间的时间段期间，将指纹感测电路设置提供给指纹感测电路。
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公开(公告)号：US09842242B1
公开(公告)日：2017-12-12
申请号：US15622236
申请日：2017-06-14
Applicant: Fingerprint Cards AB
Inventor： Andreas Larsson , David Carling , Fredrik Ramberg , Hans Thörnblom
IPC: G06K9/00
CPC classification number: G06K9/0002 , G06K9/00067
Abstract: The present invention relates to a method for determining a finger movement event on a fingerprint sensor. The method comprises to acquire signals indicative of the portion of finger detecting structures that may be touched by a finger. Based on the ratio between the signals and a total signal level, the position of the finger on the fingerprint sensing device can be determined at two different time instances. Based on the positions which may be the same, a finger movement event may be determined. The invention also relates to a corresponding fingerprint sensing device.
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公开(公告)号：US20170168600A1
公开(公告)日：2017-06-15
申请号：US15359114
申请日：2016-11-22
Applicant: Fingerprint Cards AB
Inventor： Eric Setterberg , David Carling
CPC classification number: G06F3/041 , G06F3/0304 , G06F3/03547 , G06F2203/0338 , G06K9/00013 , G06K9/0008 , G06K9/00335 , G06K9/00355 , G06K9/52 , G06K9/6215 , G06K2009/3291
Abstract: A method of estimating a finger movement comprising acquiring a navigation evaluation image from each of at least three navigation subareas of a fingerprint sensor; determining, for each of the navigation evaluation images, a navigation-related property of the navigation evaluation image; evaluating the navigation-related properties to find a combination of at least a first navigation-related property and a second navigation-related property that fulfills a navigation requirement; and selecting at least a first navigation subarea related to the first navigation-related property and a second navigation subarea related to the second navigation-related property. The finger movement is then estimated using a sequence of first navigation images acquired using the first navigation subarea, and a sequence of second navigation images acquired using the second navigation subarea.
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公开(公告)号：US09600707B1
公开(公告)日：2017-03-21
申请号：US15196617
申请日：2016-06-29
Applicant: Fingerprint Cards AB
Inventor： Fredrik Ramberg , Hans Thörnblom , David Carling , Frank Robert Riedijk
CPC classification number: G06K9/0002 , G06F3/045 , G06K9/00053
Abstract: There is provided a capacitive fingerprint sensing device comprising a plurality of sensing elements, sensing circuitry for providing an analog sensing signal, drive signal circuitry providing a drive signal comprising a drive pulse having a maximum level and a minimum level, providing a change in potential difference between the finger and the sensing structure, analog sampling circuitry comprising at least three analog sample and hold circuits arranged to sample the sensing signal, and a sampling control unit for individually controlling the sample and hold circuits to capture a sample at a specified time, wherein the samples comprises one sample captured when the drive signal is at a first voltage level V1 and one sample captured when the drive signal is at a second voltage level V2, different from V1; and an analog-to-digital converter, ADC, configured to convert a combination of the samples into a digital signal, wherein the three samples are captured times such that a noise component is suppressed from the sensing signal when the combination is formed.
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