公开(公告)号：US20180173922A1

公开(公告)日：2018-06-21

申请号：US15807139

申请日：2017-11-08

Applicant: Fingerprint Cards AB

Inventor： Farzan GHAVANINI ,  Pontus JÄGEMALM

IPC: G06K9/00 ,  G06F3/041 ,  G06F3/044 ,  H01L27/32

CPC classification number: G06K9/0002 ,  G06F3/0412 ,  G06F3/0416 ,  G06F3/044 ,  G06F2203/04112 ,  H01L27/323

Abstract: A capacitive fingerprint sensing device for sensing a fingerprint pattern of a finger can comprise a plurality of sensing elements. Each sensing element comprises a protective dielectric top layer to be touched by the finger; a first electrode comprising an optically transparent electrically conductive sensing structure arranged underneath the top layer; fingerprint sensing circuitry connected to the first electrode and configured to provide an analog sensing signal indicative of a distance between the finger and the sensing structure, a second electrode arranged underneath the first electrode; an organic light emitting layer arranged between the first and second electrodes; display element control circuitry connected to the second electrode and configured to control a display element comprising the first and second electrodes and the organic light emitting layer; and a switching mechanism configured to switch the sensing element between a fingerprint sensing mode and a display mode.

公开(公告)号：US20210312157A1

公开(公告)日：2021-10-07

申请号：US17272577

申请日：2018-09-05

Applicant: Fingerprint Cards AB

Inventor： Jun LIU ,  Ehsan HASHEMI ,  Hans MARTINSSON ,  René NILSSON ,  Farzan GHAVANINI

IPC: G06K9/00 ,  H03K17/96

Abstract: There is an optical biometric imaging device configured to capture an image of an object in contact with an outer surface of the biometric imaging device, the biometric imaging device comprising: an image sensor comprising a photodetector pixel array and image sensor circuitry configured to capture an image of the object in contact with the outer surface of the imaging device; the image sensor comprising a first electrically conductive structure arranged adjacent to an active sensing area of the photodetector pixel array; a display panel arranged on top of and at a distance from the image sensor, the display panel comprising a second electrically conductive structure on a bottom side of the display panel and arranged to face the first electrically conductive structure of the image sensor; and capacitive readout circuitry arranged and configured to detect a capacitance between the first electrically conductive structure and the second electrically conductive structure.

公开(公告)号：US20210357603A1

公开(公告)日：2021-11-18

申请号：US16757808

申请日：2018-10-23

Applicant: FINGERPRINT CARDS AB

Inventor： Farzan GHAVANINI ,  Jonas TALLHAGE ,  Frank RIEDIJK ,  René NILSSON ,  Wieslaw BICZ ,  Agnieszka BICZ

IPC: G06K9/00 ,  G06F3/043 ,  G06F3/041

Abstract: A method for controlling a plurality of ultrasonic transducers in a fingerprint sensing system that comprises a cover plate having a sensing surface configured to be touched by a finger, and a plurality of ultrasonic transducers located at the periphery of the cover plate and configured to transmit an acoustic signal propagating in the cover plate, receive an ultrasonic signal having interacted with an object in contact with the sensing surface, and to determine properties of the object based on the received ultrasonic signal. The method comprises: in response to a first input, controlling the plurality of transducers such that at least a portion of the sensing surface has a first feature detection resolution; and in response to a second input, controlling the plurality of transducers such that at least a portion of the sensing surface has a second feature detection resolution, different from the first feature detection resolution.

公开(公告)号：US20210165985A1

公开(公告)日：2021-06-03

申请号：US16772929

申请日：2018-12-11

Applicant: Fingerprint Cards AB

Inventor： Martin GRIP ,  Farzan GHAVANINI

IPC: G06K9/00 ,  G06K9/22 ,  H01L27/32 ,  G06F3/044 ,  G02F1/1333 ,  B06B1/02 ,  G02F1/1362 ,  G06F3/041

Abstract: There is provided a display arrangement comprising an ultrasonic biometric sensing device. The display arrangement comprises: a cover plate having a sensing surface configured to be touched by a finger; a display panel comprising a plurality of sub-layers; a plurality of ultrasonic transducers arranged along the periphery of the display arrangement and outside of an active display area of the display arrangement, each ultrasonic transducer comprising a top and bottom electrode; and ultrasonic transducer control circuitry to control the ultrasonic transducers to determine properties of an object in contact with the sensing surface. One of the sub-layers in the display panel comprises a protruding portion extending outside of an area of any other sub-layer located between the sub-layer comprising the protruding portion and the cover plate, and the plurality of ultrasonic transducers are arranged on the protruding portion between the protruding portion and the cover plate.