Abstract: A method of estimating a finger movement comprising acquiring a navigation evaluation image from each of at least three navigation subareas of a fingerprint sensor; determining, for each of the navigation evaluation images, a navigation-related property of the navigation evaluation image; evaluating the navigation-related properties to find a combination of at least a first navigation-related property and a second navigation-related property that fulfills a navigation requirement; and selecting at least a first navigation subarea related to the first navigation-related property and a second navigation subarea related to the second navigation-related property. The finger movement is then estimated using a sequence of first navigation images acquired using the first navigation subarea, and a sequence of second navigation images acquired using the second navigation subarea.

Abstract: There is provided a test module for testing a fingerprint sensing device comprising: an electrically conductive bottom element comprising an exterior surface portion configured to contact a sensing surface of the fingerprint sensing device; an electrically conductive intermediate element, connected to the bottom element on a side opposing the exterior surface, the intermediate element comprising a flexible material enabling the bottom element to change alignment in response to an applied force occurring when the exterior surface is pressed against a surface being tilted with respect to the exterior surface of the bottom element; and a top element configured connect the test module to a test fixture. There is also provided a method for testing a fingerprint sensing device using the described test module.

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.

Abstract: There is provided a test module for testing a fingerprint sensing device comprising: an electrically conductive bottom element comprising an exterior surface portion configured to contact a sensing surface of the fingerprint sensing device; an electrically conductive intermediate element, connected to the bottom element on a side opposing the exterior surface, the intermediate element comprising a flexible material enabling the bottom element to change alignment in response to an applied force occurring when the exterior surface is pressed against a surface being tilted with respect to the exterior surface of the bottom element; and a top element configured connect the test module to a test fixture. There is also provided a method for testing a fingerprint sensing device using the described test module.

Abstract: The present invention generally relates to authenticating a user of an electronic device comprising a capacitive fingerprint sensor and an optical sensor arranged side-by-side with the capacitive fingerprint sensor. In accordance with the present invention a first image of at least a first portion of an object is acquired using the capacitive fingerprint sensor and an optical image of at least a second portion of the object is acquired using the optical sensor, the optical image and the first image being representative of neighboring portions of the object. An edge portion of the first image is matched with at least an edge portion of the optical image, where the edge portions represent the object at the border between the capacitive fingerprint sensor and the optical sensor. When there is a match, a fingerprint authentication procedure may be performed.

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.

Abstract: A method of determining a representation of a physical property of a finger using a finger sensing system comprising a two-dimensional measuring arrangement including a plurality of measuring elements, each defining a measuring element position in the measuring arrangement, and each comprising a finger electrode spaced apart from the finger by a dielectric structure.

Abstract: The present invention generally relates to a method for authenticating a user of an electronic device comprising a fingerprint sensor and a force sensor, the method comprising: retrieving a stored plurality of fingerprint enrollment templates comprising an enrollment representation of at least part of a user's finger and a corresponding enrollment force parameter, acquiring a first verification image of an object and determining a first verification representation, determining a first verification force parameter, performing a fingerprint authentication procedure based on the first verification template and the plurality of fingerprint enrollment templates, wherein when the first verification representation and the first verification force parameter comprised in the first verification template matches each of the enrollment representation and the enrollment force parameter comprised in the same fingerprint enrollment template providing a signal indicating successful authentication of the user.

Abstract: The present invention relates to a method of estimating a finger movement direction of a finger, comprising the steps of: a) acquiring a reference fingerprint image; b) acquiring at least one candidate fingerprint image at each acquisition time in a time sequence of acquisition times; c) determining, for each of the acquisition times, a match parameter value for each of a plurality of candidate finger movement directions, the match parameter value being indicative of a correlation between a reference fingerprint image portion and a candidate fingerprint image portion corresponding to displacement in the candidate finger movement direction; d) determining, for each of the candidate finger movement directions, a local extremum match parameter value indicating a maximum correlation for the time sequence of acquisition times; and e) estimating the finger movement based on an evaluation of the determined local extremum match parameters.

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.

Abstract: The present invention generally relates to a method for forming a fingerprint using a fingerprint sensing system, and specifically to the possibility of allowing the formation of a fingerprint when only separated portions of the fingerprint is available. The invention also relates to the corresponding fingerprint sensing system and to a computer program product.

Abstract: A capacitive fingerprint sensing device and method therein for noise detection are disclosed. The fingerprint sensing device comprises a plurality of sensing elements, each having 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 configured to provide a sensing signal indicative of the capacitive coupling between the finger and the sensing structures 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. When in the noise-detection mode, the fingerprint sensing device is configured to control the timing circuitry such that a drive signal is provided. The fingerprint sensing device repeatedly senses a capacitive coupling between the finger and at least one sensing structure and provides a time-dependent sensing signal by means of said sensing circuitry.

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.

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.

Abstract: The present invention relates to a method of controlling a fingerprint sensing system for liveness authentication. The method comprising acquiring a first set of sensing signals and a second set of sensing signals from a fingerprint sensor in two different operational modes and subsequently provide a liveness authentication signal based on the first set of sensing signals and the second set of sensing signals. The invention also relates to a fingerprint sensing system and an electronic device.

Abstract: The invention relates to a fingerprint sensing device comprising: a sensing chip comprising an array of sensing elements being configured to be connected to readout circuitry for detecting a capacitive coupling between each of the sensing elements and a finger placed on a sensing surface of the sensing device. A surface of the sensing elements defines a sensing plane. The sensing device further comprises a plurality of interposer structures arranged on the sensing chip extending above sensing plane, wherein the plurality of interposer structures have the same height above the sensing plane. A protective plate is attached to the sensing chip by means of an adhesive, and the protective plate rests on the interposer structures such that a distance between the protective plate and the sensing plane is defined by the height of the interposer structures.

Abstract: The invention relates to a fingerprint sensing device comprising a sensing chip comprising an array of capacitive sensing elements. The sensing device comprises a coating material arranged in a layer on top of the array of sensing elements, the coating material comprising a plurality of cavities filled with a mold material; wherein locations of the cavities correspond to locations of the sensing elements, such that a cross-section area of a cavity covers at least a portion of an area of a corresponding sensing element; and wherein a dielectric constant of the mold material is higher than a dielectric constant of the coating material. The invention also relates to a method for manufacturing such a device.

Abstract: The present invention relates to a method for determining a finger movement event on a fingerprint sensor. The method comprises to acquire signals indicative of the portion of finger detecting structures that may be touched by a finger. Based on the ratio between the signals and a total signal level, the position of the finger on the fingerprint sensing device can be determined at two different time instances. Based on the positions which may be the same, a finger movement event may be determined. The invention also relates to a corresponding fingerprint sensing device.

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.

Abstract: A method of correcting charge values acquired from a capacitive fingerprint sensor, comprising acquiring a list of one or more defective capacitive sensor elements and for defective capacitive sensor element in the list, selecting its position as a first position and: performing a first operation by placing a first filter window about the first position and computing a replacement value for the first position from charge values within the first filter window, but forgoing computing a replacement value for the first position in case a first threshold number of defective capacitive sensor elements located within the first filter window is exceeded; in case the first operation forgo computing a replacement value for the first position, performing a second operation by placing a second filter window about the first position and computing a replacement value for the first position from charge values within the second filter window, but forgoing computing a replacement value for the first position in case a second