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公开(公告)号：US09684812B2
公开(公告)日：2017-06-20
申请号：US15168671
申请日：2016-05-31
Applicant: Fingerprint Cards AB
Inventor： Frank Robert Riedijk , Klaas-Jan de Lange
IPC: G06K9/00
CPC classification number: G06K9/0002 , G06K9/22
Abstract: The present invention relates to a fingerprint sensing device for sensing a fingerprint pattern of a finger, the fingerprint sensing device comprising at least a first sensing structure and a second sensing structure; and at least a first charge amplifier and a second charge amplifier. Each charge amplifier comprises: a first input; a second input; an output; and at least one amplifier stage between the first and second inputs, and the output. The output is capacitively coupled to the first input. The first input of the first charge amplifier is connected to the first sensing structure; the first input of the second charge amplifier is connected to the second sensing structure; and the output of the first charge amplifier is capacitively coupled to the first input of the second charge amplifier to suppress the common mode component.
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12.发明申请CAPACITIVE FINGERPRINT SENSING DEVICE WITH DEMODULATION CIRCUITRY IN SENSING ELEMENT 有权传感元件中具有解调电路的电容指纹传感装置公开(公告)号：US20160180619A1
公开(公告)日：2016-06-23
申请号：US14812480
申请日：2015-07-29
Applicant: FINGERPRINT CARDS AB
Inventor： Frank Robert Riedijk
CPC classification number: G07C9/00158 , G01R27/2605 , G06K9/0002
Abstract: The present invention relates to a capacitive fingerprint sensing system comprising excitation signal providing circuitry and a plurality of sensing elements. Each sensing element includes a protective dielectric top layer, an electrically conductive sensing structure coupled to the excitation signal for providing a sensing signal indicative of a change of a charge carried by the sensing structure resulting from a change in potential difference between the finger and the sensing structure, and demodulation circuitry connected to the sensing circuitry for combining the sensing signal and a demodulation signal being timing-related to the excitation signal to provide a combined signal including a DC signal component indicating the change of the charge carried by the sensing structure. The fingerprint sensing system further comprises readout circuitry connected to each of the sensing elements for providing a representation of the fingerprint pattern based on the DC signal component from each of the sensing elements.
Abstract translation: 本发明涉及包括激励信号提供电路和多个感测元件的电容式指纹感测系统。 每个感测元件包括保护电介质顶层，耦合到激励信号的导电感测结构，用于提供指示感测结构携带的电荷的变化的感测信号，这是由手指和感测之间的电位差的变化引起的 结构和解调电路，其连接到感测电路，用于组合感测信号和与激励信号定时相关的解调信号，以提供包括指示感测结构承载的电荷变化的DC信号分量的组合信号。 指纹感测系统还包括连接到每个感测元件的读出电路，用于基于来自每个感测元件的DC信号分量提供指纹图案的表示。
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13.发明申请CAPACITIVE FINGERPRINT SENSOR WITH SENSING ELEMENTS COMPRISING TIMING CIRCUITRY 有权具有包含时序电路的感应元件的电容指纹传感器公开(公告)号：US20160180138A1
公开(公告)日：2016-06-23
申请号：US14812578
申请日：2015-07-29
Applicant: FINGERPRINT CARDS AB
Inventor： Frank Robert Riedijk
CPC classification number: G06K9/0002 , A61B2562/0214 , G01R27/2605 , G06F3/03547 , G07C9/00
Abstract: The present invention relates to a capacitive fingerprint sensing device for sensing a fingerprint pattern of a finger, the capacitive fingerprint sensor comprising a plurality of sensing elements, each including: a protective dielectric top layer to be touched by the finger; an electrically conductive sensing structure arranged underneath the top layer; charge measuring circuitry connected to the sensing structure for sequentially transitioning between at least a first measurement state and a second measurement state to perform a measurement sequence resulting in an output signal from the charge measuring circuitry being indicative of a change of a charge carried by the sensing structure resulting from a change in a potential difference between the finger and the sensing structure; and timing circuitry connected to the charge measuring circuitry for controlling a timing of at least one of the measurement states.
Abstract translation: 本发明涉及用于感测手指指纹图案的电容式指纹感测装置，该电容式指纹传感器包括多个感测元件，每个感测元件包括：被手指触摸的保护电介质顶层; 布置在顶层下方的导电感测结构; 电荷测量电路，其连接到所述感测结构，用于在至少第一测量状态和第二测量状态之间顺序转换，以执行测量序列，从而产生来自所述电荷测量电路的输出信号，其指示由所述感测携带的电荷的变化 由手指和感测结构之间的电位差的变化引起的结构; 以及连接到所述电荷测量电路的定时电路，用于控制所述测量状态中的至少一个的定时。
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14.发明申请公开(公告)号：US20150347807A1
公开(公告)日：2015-12-03
申请号：US14718776
申请日：2015-05-21
Applicant: FINGERPRINT CARDS AB
Inventor： Sebastian Weber , Markus Andersson , Hans Thörnblom , Frank Robert Riedijk
IPC: G06K9/00
CPC classification number: G06K9/0002 , G06K9/0008 , G06K9/001
Abstract: The present invention relates to an electronic device comprising a fingerprint sensing system including a plurality of sensing elements, each being configured to capacitively couple to a finger arranged adjacent to the sensing element and to provide a sensing signal indicative of a response to a time-varying finger excitation signal provided to the finger; and an electrically conducting housing at least partly enclosing an interior of the electronic device. The electronic device further comprises housing connection circuitry connected to the electrically conducting housing, and arranged and configured to at least intermittently allow a potential of the electrically conducting housing to follow the finger excitation signal. Hereby the housing can be used to enhance the functionality of the fingerprint sensing system.
Abstract translation: 电子设备技术领域本发明涉及一种电子设备，其包括指纹感测系统，其包括多个感测元件，每个感测元件被配置为电容耦合到与感测元件相邻布置的手指，并提供指示对时变的响应的感测信号 手指激励信号提供给手指; 以及至少部分地包围所述电子设备的内部的导电外壳。 电子设备还包括连接到导电壳体的壳体连接电路，并且被布置和配置为至少间歇地允许导电壳体的电位跟随手指激励信号。 因此，壳体可用于增强指纹感测系统的功能。
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公开(公告)号：US09152841B1
公开(公告)日：2015-10-06
申请号：US14548834
申请日：2014-11-20
Applicant: FINGERPRINT CARDS AB
Inventor： Frank Robert Riedijk
CPC classification number: G06K9/0002 , A61B5/117 , A61B5/1172 , A61B2562/0214 , A61B2562/046 , G01R27/26 , G06K9/00053 , G06K9/0008 , G06K9/036 , G07C9/00158
Abstract: The present invention relates to a capacitive fingerprint sensing device comprising a semiconductor substrate; and an array of sensing elements formed on the semiconductor substrate. Each of the sensing elements comprises a protective dielectric top layer; a sensing structure arranged underneath the top layer; and a charge amplifier connected to the sensing structure. The charge amplifier comprises a negative input connected to the sensing structure; a positive input; an output providing a sensing signal; a feedback capacitor; and a sense transistor having a gate constituting the negative input. The sense transistor is formed in an insulated well in the semiconductor substrate. The fingerprint sensing device further comprises excitation signal providing circuitry connected to the positive input of the charge amplifier and the well for changing electric potentials of the sensing structure and the well, to thereby reduce the influence of parasitic capacitances in the sensing element.
Abstract translation: 本发明涉及包括半导体衬底的电容式指纹感测装置; 以及形成在半导体衬底上的感测元件阵列。 每个感测元件包括保护电介质顶层; 布置在顶层下方的感测结构; 以及连接到感测结构的电荷放大器。 电荷放大器包括连接到感测结构的负输入; 积极的投入; 输出提供感测信号; 反馈电容器; 以及具有构成负输入的栅极的检测晶体管。 感测晶体管形成在半导体衬底中的绝缘阱中。 指纹感测装置还包括连接到电荷放大器和阱的正输入的激励信号提供电路，用于改变感测结构和阱的电位，从而减小感测元件中寄生电容的影响。
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Patent Agency Ranking
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：US20170091509A1
公开(公告)日：2017-03-30
申请号：US15168671
申请日：2016-05-31
Applicant: Fingerprint Cards AB
Inventor： Frank Robert Riedijk , Klaas-Jan de Lange
IPC: G06K9/00
CPC classification number: G06K9/0002 , G06K9/22
Abstract: The present invention relates to a fingerprint sensing device for sensing a fingerprint pattern of a finger, the fingerprint sensing device comprising at least a first sensing structure and a second sensing structure; and at least a first charge amplifier and a second charge amplifier. Each charge amplifier comprises: a first input; a second input; an output; and at least one amplifier stage between the first and second inputs, and the output. The output is capacitively coupled to the first input. The first input of the first charge amplifier is connected to the first sensing structure; the first input of the second charge amplifier is connected to the second sensing structure; and the output of the first charge amplifier is capacitively coupled to the first input of the second charge amplifier to suppress the common mode component.
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18.发明授权Capacitive fingerprint sensing device with demodulation circuitry in sensing element 有权具有感应元件解调电路的电容式指纹感测装置公开(公告)号：US09460576B2
公开(公告)日：2016-10-04
申请号：US14812480
申请日：2015-07-29
Applicant: FINGERPRINT CARDS AB
Inventor： Frank Robert Riedijk
CPC classification number: G07C9/00158 , G01R27/2605 , G06K9/0002
Abstract: A capacitive fingerprint sensing system includes excitation signal providing circuitry and a plurality of sensing elements. Each sensing element includes a protective dielectric top layer, an electrically conductive sensing structure coupled to the excitation signal for providing a sensing signal indicative of a change of a charge carried by the sensing structure resulting from a change in potential difference between the finger and the sensing structure, and demodulation circuitry connected to the sensing circuitry for combining the sensing signal and a demodulation signal being timing-related to the excitation signal to provide a combined signal including a DC signal component indicating the change of the charge carried by the sensing structure. The fingerprint sensing system further includes readout circuitry connected to each of the sensing elements for providing a representation of the fingerprint pattern based on the DC signal component from each of the sensing elements.
Abstract translation: 电容指纹感测系统包括激励信号提供电路和多个感测元件。 每个感测元件包括保护电介质顶层，耦合到激励信号的导电感测结构，用于提供指示感测结构携带的电荷的变化的感测信号，这是由手指和感测之间的电位差的变化引起的 结构和解调电路，其连接到感测电路，用于组合感测信号和与激励信号定时相关的解调信号，以提供包括指示感测结构承载的电荷变化的DC信号分量的组合信号。 指纹感测系统还包括连接到每个感测元件的读出电路，用于基于来自每个感测元件的DC信号分量提供指纹图案的表示。
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公开(公告)号：US09383876B2
公开(公告)日：2016-07-05
申请号：US14324549
申请日：2014-07-07
Applicant: Fingerprint Cards AB
Inventor： Frank Robert Riedijk , Hans Thornblom
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.
Abstract translation: 指纹感测系统包括具有可连接到每个感测结构的多个感测结构和读出电路的传感器阵列，和布置成向读出电路提供基本上恒定的电源电压的电源电路，该电源电压是 高潜力和低潜力。 指纹感测系统被配置为使得低电位和高电位是可变的，同时基本上保持电源电压，并且读出电路可以以这样的方式连接到每个感测结构，即， 低电位和高电位，同时基本上保持电源电压导致连接到读出电路的感测结构承载的电荷的变化。 电荷的变化表示感测结构和手指之间的电容耦合。
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公开(公告)号：US20150015537A1
公开(公告)日：2015-01-15
申请号：US14324549
申请日：2014-07-07
Applicant: Fingerprint Cards AB
Inventor： Frank Robert Riedijk , Hans Thornblom
IPC: G06F3/044
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: The present invention relates to a fingerprint sensing system comprising 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.
Abstract translation: 本发明涉及一种指纹感测系统，其包括具有多个感测结构的传感器阵列和可连接到每个感测结构的读出电路，以及电源电路，其被布置成向读出电路提供基本上恒定的电源电压 是高电位和低电位之间的差异。 指纹感测系统被配置为使得低电位和高电位是可变的，同时基本上保持电源电压，并且读出电路可以以这样的方式连接到每个感测结构，即， 低电位和高电位，同时基本上保持电源电压导致连接到读出电路的感测结构承载的电荷的变化。 电荷的变化表示感测结构和手指之间的电容耦合。
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