公开(公告)号：US09953204B2

公开(公告)日：2018-04-24

申请号：US15399124

申请日：2017-01-05

Applicant: Fingerprint Cards AB

Inventor： Rolf Sundblad ,  Emil Hjalmarson ,  Erik Säll ,  Allan Olsson ,  Klaas-Jan De Langen

IPC: G06K9/00 ,  H02M3/07 ,  G06K9/03

CPC classification number: G06K9/0002 ,  G06K9/00087 ,  G06K9/03 ,  H02M3/07

Abstract: A fingerprint sensing system comprising a device connection interface including a device reference potential input, a sensing arrangement, and sensing reference potential providing circuitry. The sensing arrangement includes multiple sensing structures and read-out circuitry connected to each of the sensing structures. The sensing reference potential providing circuitry provides a sensing reference potential to the sensing arrangement in the form of a sensing reference signal alternating between a first sensing reference potential and a second sensing reference potential, and comprises a first capacitor; a second capacitor; charging circuitry; and switching circuitry for alternatingly switching the sensing reference potential providing circuitry between a first state in which the first capacitor and the second capacitor are connected in parallel to the charging circuitry; and a second state in which the first capacitor and the second capacitor, when charged, are connected in series between the device reference potential input and the sensing arrangement.

公开(公告)号：US20180082049A1

公开(公告)日：2018-03-22

申请号：US15710923

申请日：2017-09-21

Applicant: Fingerprint Cards AB

Inventor： Olis OLOFSSON ,  Sebastian WEBER

IPC: G06F21/32 ,  G06K9/00 ,  G07C9/00 ,  G06K9/03

CPC classification number: G06F21/32 ,  G06K9/0002 ,  G06K9/00912 ,  G06K9/036 ,  G06K9/60 ,  G07C9/00158

Abstract: The present disclosure relates to an electronic device and corresponding method further enhancing how and what type of user guidance is given to a user operating a fingerprint sensor comprised with the electronic device. The present disclosure also related to a corresponding computer program product.

公开(公告)号：US09898640B2

公开(公告)日：2018-02-20

申请号：US15409803

申请日：2017-01-19

Applicant: Fingerprint Cards AB

Inventor： Farzan Ghavanini

IPC: G06K9/00 ,  G06F3/044

CPC classification number: G06K9/0002 ,  G06F3/044 ,  G06K9/0008 ,  G06K9/00087 ,  G06K9/00107 ,  G06K9/00899

Abstract: There is provided a capacitive fingerprint sensing device for sensing a fingerprint pattern of a finger, the capacitive fingerprint sensing device comprising: a protective dielectric top layer having an outer surface forming a sensing surface to be touched by the finger; at least one electrically conductive sensing structure arranged underneath the top layer; readout circuitry coupled to the at least one electrically conductive sensing structure to receive a sensing signal indicative of a distance between the finger and the sensing structure; and a plurality of individually controllable electroacoustic transducers arranged underneath the top layer and configured to generate a focused ultrasonic beam, and to transmit the ultrasonic beam through the protective dielectric top layer towards the sensing surface to induce an ultrasonic vibration potential in a ridge of finger placed in contact with the sensing surface at the location of the ultrasonic beam.

公开(公告)号：US20180012010A1

公开(公告)日：2018-01-11

申请号：US15698087

申请日：2017-09-07

Applicant: Fingerprint Cards AB

Inventor： Sebastian Weber

IPC: G06F21/32 ,  G06K9/00

CPC classification number: G06F21/32 ,  G06K9/00073

Abstract: The present disclosure relates to secure storage of a detailed set of elements relating to fingerprint features for a finger and to a method for authenticating a candidate fingerprint of a finger using said detailed set of elements, allowing for improved security and user convenience.

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：US20170351895A1

公开(公告)日：2017-12-07

申请号：US15464680

申请日：2017-03-21

Applicant: Fingerprint Cards AB

Inventor： Karl Lundahl ,  Robert Hägglund ,  Emil Hjalmarson ,  Rolf Sundblad ,  Christer Jansson

IPC: G06K9/00

CPC classification number: G06K9/0002 ,  G06F3/0412 ,  G06F2203/0338 ,  G06F2203/04103 ,  G06K9/00087

Abstract: There is provided a capacitive fingerprint sensing device for sensing a fingerprint pattern of a finger, said capacitive fingerprint sensing device comprising: a protective top layer to be touched by said finger; a first metal layer comprising a two-dimensional array of sensing structures arranged underneath said top layer; a second metal layer, arranged underneath said first metal layer, comprising a plurality of conductive structures a dielectric layer arranged between the first and second metal layers to electrically insulate the first metal layer from the second metal layer, the dielectric layer comprising a low-k material; and readout circuitry arranged underneath said second metal layer and coupled to each of the electrically conductive sensing structures by means of via connections to receive a sensing signal indicative of a distance between said finger and said sensing structure. There is also provided a method for manufacturing such a device.

公开(公告)号：US20170344780A1

公开(公告)日：2017-11-30

申请号：US15484554

申请日：2017-04-11

Applicant: Fingerprint Cards AB

Inventor： Frank RIEDIJK ,  Hans THÖRNBLOM ,  Daniel ANDERSSON

IPC: G06K9/00

CPC classification number: G06K9/0002 ,  G06K9/00053

Abstract: There is provided a capacitive fingerprint sensing device for sensing a fingerprint pattern of a finger, the capacitive fingerprint sensor comprising: a protective dielectric top layer to be touched by the finger; a two-dimensional array of electrically conductive sensing structures arranged underneath the top layer; readout circuitry coupled to each of the electrically conductive sensing structures to receive a sensing signal indicative of a distance between the finger and the sensing structure, the readout circuitry comprising a plurality of signal amplifiers arranged underneath the array of electrically conductive sensing structures, wherein a number of signal amplifiers is lower than a number of sensing structures; and selection circuitry coupling each of the sensing structures to at least one signal amplifier and configured to select a sensing structure to be coupled to a corresponding signal amplifier. There is also provided a method for controlling a 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：US20170308730A1

公开(公告)日：2017-10-26

申请号：US15399124

申请日：2017-01-05

Applicant: Fingerprint Cards AB

Inventor： Rolf Sundblad ,  Emil Hjalmarson ,  Erik Säll ,  Allan Olsson ,  Klaas-Jan De Langen

IPC: G06K9/00 ,  G06K9/03

CPC classification number: G06K9/0002 ,  G06K9/00087 ,  G06K9/03 ,  H02M3/07

Abstract: A fingerprint sensing system comprising a device connection interface including a device reference potential input, a sensing arrangement, and sensing reference potential providing circuitry. The sensing arrangement includes multiple sensing structures and read-out circuitry connected to each of the sensing structures. The sensing reference potential providing circuitry provides a sensing reference potential to the sensing arrangement in the form of a sensing reference signal alternating between a first sensing reference potential and a second sensing reference potential, and comprises a first capacitor; a second capacitor; charging circuitry; and switching circuitry for alternatingly switching the sensing reference potential providing circuitry between a first state in which the first capacitor and the second capacitor are connected in parallel to the charging circuitry; and a second state in which the first capacitor and the second capacitor, when charged, are connected in series between the device reference potential input and the sensing arrangement.