公开(公告)号：US20150169932A1

公开(公告)日：2015-06-18

申请号：US14566175

申请日：2014-12-10

Applicant: FINGERPRINT CARDS AB

Inventor： Frank Robert Riedijk ,  Hans Thornblom

IPC: G06K9/00

CPC classification number: G06K9/001 ,  G06K9/00013 ,  G06K9/0002

Abstract: The present invention relates to a method of determining a representation of a fingerprint pattern. The method comprises the steps of acquiring a reference signal indicative of an electric coupling between a hand surface having friction ridges and a reference sensing structure extending across a plurality of the friction ridges; and determining the representation of the fingerprint pattern based on the reference signal and a capacitive coupling between the finger and each of a plurality of sensing elements. The acquired reference signal can, for example, be used for controlling the sensing elements so that the sensing performed by the sensing elements is carried out using favorable timing, when the signal quality is good. Alternatively, or in combination, the acquired reference signal may be used for post-processing, whereby the signals/signal values obtained by the sensing elements are modified depending on the corresponding values of the reference signal.

Abstract translation: 本发明涉及一种确定指纹图案表示的方法。 该方法包括以下步骤：获取指示具有摩擦脊的手表面与延伸穿过多个摩擦脊的参考感测结构之间的电耦合的参考信号; 以及基于所述参考信号和所述手指与多个感测元件中的每一个之间的电容耦合来确定所述指纹图案的表示。 所获取的参考信号例如可以用于控制感测元件，使得当信号质量良好时，利用感测元件执行的感测是通过有利的定时进行的。 或者或组合地，所获取的参考信号可以用于后处理，由此根据参考信号的对应值修改由感测元件获得的信号/信号值。

公开(公告)号：US09323975B2

公开(公告)日：2016-04-26

申请号：US14566175

申请日：2014-12-10

Applicant: FINGERPRINT CARDS AB

Inventor： Frank Robert Riedijk ,  Hans Thornblom

IPC: G06K9/00

CPC classification number: G06K9/001 ,  G06K9/00013 ,  G06K9/0002

Abstract: The present invention relates to a method of determining a representation of a fingerprint pattern. The method comprises the steps of acquiring a reference signal indicative of an electric coupling between a hand surface having friction ridges and a reference sensing structure extending across a plurality of the friction ridges; and determining the representation of the fingerprint pattern based on the reference signal and a capacitive coupling between the finger and each of a plurality of sensing elements. The acquired reference signal can, for example, be used for controlling the sensing elements so that the sensing performed by the sensing elements is carried out using favorable timing, when the signal quality is good. Alternatively, or in combination, the acquired reference signal may be used for post-processing, whereby the signals/signal values obtained by the sensing elements are modified depending on the corresponding values of the reference signal.

Abstract translation: 本发明涉及一种确定指纹图案表示的方法。 该方法包括以下步骤：获取指示具有摩擦脊的手表面与延伸穿过多个摩擦脊的参考感测结构之间的电耦合的参考信号; 以及基于所述参考信号和所述手指与多个感测元件中的每一个之间的电容耦合来确定所述指纹图案的表示。 所获取的参考信号例如可以用于控制感测元件，使得当信号质量良好时，利用感测元件执行的感测是通过有利的定时进行的。 或者或组合地，所获取的参考信号可以用于后处理，由此根据参考信号的对应值修改由感测元件获得的信号/信号值。

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

IPC: G06F3/045 ,  G06F3/044 ,  G06K9/00

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。

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。