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.

公开(公告)号：US20170330013A1

公开(公告)日：2017-11-16

申请号：US15591578

申请日：2017-05-10

Applicant: Fingerprint Cards AB

Inventor： Fredrik Ramberg ,  Hans Thörnblom

IPC: G06K9/00

CPC classification number: G06K9/0002 ,  G03F7/16 ,  G06F3/043 ,  G06F3/0436 ,  G06F3/044 ,  G06K9/00053 ,  G06K9/00087 ,  G06K9/00899

Abstract: A capacitive fingerprint sensing device and method therein for noise detection are disclosed. The capacitive fingerprint sensing device comprises a plurality of sensing elements, each comprising a sensing structure and configured to sense a capacitive coupling between the sensing structure and a finger. The fingerprint sensing device further comprises sensing circuitry and timing circuitry configured to control a timing of a drive signal. The fingerprint sensing device is controllable to operate in a noise-detection mode and in a fingerprint mode. In the noise-detection mode, the fingerprint sensing device is configured to control the timing circuitry such that no drive signal is provided. The fingerprint sensing device senses a capacitive coupling between the finger and at least one sensing structure and provides a sensing signal indicative of the capacitive coupling between the finger and the sensing structures by means of said sensing circuitry.

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.

公开(公告)号：US09607205B2

公开(公告)日：2017-03-28

申请号：US14951056

申请日：2015-11-24

Applicant: FINGERPRINT CARDS AB

Inventor： Eric Setterberg ,  Hamid Sarve ,  Hans Thörnblom ,  Kenneth Jonsson

IPC: G06K9/00 ,  G06F3/044 ,  G06F1/16

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.

公开(公告)号：US09589171B1

公开(公告)日：2017-03-07

申请号：US15176891

申请日：2016-06-08

Applicant: Fingerprint Cards AB

Inventor： Andreas Larsson ,  Hans Thörnblom ,  Fredrik Ramberg ,  Frank Robert Riedijk ,  Robert Hägglund

IPC: G06K9/00

CPC classification number: G06K9/0012 ,  G06K9/0002

Abstract: The present invention relates to a method of sensing a fingerprint pattern of a finger using a fingerprint sensing device comprising an array of sensing elements; an electrically conductive finger detecting structure; and finger detecting circuitry connected to the finger detecting structure for providing a finger detection signal indicative of a capacitive coupling between the finger detecting structure and the finger. The method comprises the steps of: comparing the finger detection signal with a first threshold value indicating a first capacitive coupling, and a second threshold value indicating a second capacitive coupling stronger than the first capacitive coupling; and activating at least a subset of the sensing elements when the finger detection signal changes from a first value indicating a capacitive coupling weaker than the first capacitive coupling to a second value indicating a capacitive coupling stronger than the second capacitive coupling.

Abstract translation: 本发明涉及使用包括感测元件阵列的指纹感测装置感测手指的指纹图案的方法; 导电手指检测结构; 以及连接到手指检测结构的手指检测电路，用于提供指示手指检测结构和手指之间的电容耦合的手指检测信号。 该方法包括以下步骤：将手指检测信号与指示第一电容耦合的第一阈值和指示比第一电容耦合更强的第二电容耦合的第二阈值进行比较; 以及当手指检测信号从表示比第一电容耦合弱的电容耦合的第一值改变到指示比第二电容耦合更强的电容耦合的第二值时激活感测元件的至少一个子集。

公开(公告)号：US09489559B2

公开(公告)日：2016-11-08

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。

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。

公开(公告)号：US10474873B2

公开(公告)日：2019-11-12

申请号：US15806834

申请日：2017-11-08

Applicant: Fingerprint Cards AB

Inventor： Frank Riedijk ,  Wouter Brevet ,  Hans Thörnblom ,  Christer Jansson

IPC: G06K9/28 ,  G06K9/00 ,  G01D5/24

Abstract: A method of determining a representation of a fingerprint pattern of a finger using a fingerprint sensor comprising a two-dimensional measuring arrangement including a plurality of measuring elements, each comprising a finger electrode spaced apart from the finger by a dielectric structure. For each measurement position, the method comprises the steps of: providing a first measuring element configuration with an elongated first measuring arrangement portion having a first principal direction of extension; and a first peripheral measuring arrangement portion; acquiring a first measurement value for the measurement position; providing a second measuring element configuration having an elongated second measuring arrangement portion having a second principal direction of extension; and a second peripheral measuring arrangement portion; and acquiring a second measurement value for the measurement position. The representation of the fingerprint pattern is determined based on the first measurement value and the second measurement value for each of the measurement positions.

公开(公告)号：US10325139B2

公开(公告)日：2019-06-18

申请号：US15456803

申请日：2017-03-13

Applicant: Fingerprint Cards AB

Inventor： Mats Tuneld ,  Fredrik Ramberg ,  Hans Thörnblom

IPC: G06K9/00 ,  G06K9/03

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.

公开(公告)号：US09984274B2

公开(公告)日：2018-05-29

申请号：US15591578

申请日：2017-05-10

Applicant: Fingerprint Cards AB

Inventor： Fredrik Ramberg ,  Hans Thörnblom

IPC: G06K9/00 ,  G03F7/16 ,  G06F3/044 ,  G06F3/043

CPC classification number: G06K9/0002 ,  G03F7/16 ,  G06F3/043 ,  G06F3/0436 ,  G06F3/044 ,  G06K9/00053 ,  G06K9/00087 ,  G06K9/00899

Abstract: A capacitive fingerprint sensing device and method therein for noise detection are disclosed. The capacitive fingerprint sensing device comprises a plurality of sensing elements, each comprising a sensing structure and configured to sense a capacitive coupling between the sensing structure and a finger. The fingerprint sensing device further comprises sensing circuitry and timing circuitry configured to control a timing of a drive signal. The fingerprint sensing device is controllable to operate in a noise-detection mode and in a fingerprint mode. In the noise-detection mode, the fingerprint sensing device is configured to control the timing circuitry such that no drive signal is provided. The fingerprint sensing device senses a capacitive coupling between the finger and at least one sensing structure and provides a sensing signal indicative of the capacitive coupling between the finger and the sensing structures by means of said sensing circuitry.