Patents by Inventor Frank Riedijk
Frank Riedijk has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20190197283Abstract: A fingerprint sensing system for sensing a fingerprint pattern of a finger, comprising: a sensor array including a plurality of electrically conductive sensing structures; read-out circuitry connected to each of the sensing structures for providing sensing signals indicative of a capacitive coupling between the sensing structures and the finger; first signal providing circuitry for providing a first time-varying voltage signal to at least a portion of the sensor array; at least one electrically conductive edge-compensating structure arranged outside the sensor array; and second signal providing circuitry for providing a second time-varying voltage signal to the at least one edge-compensating structure.Type: ApplicationFiled: September 25, 2018Publication date: June 27, 2019Applicant: Fingerprint Cards ABInventors: Frank RIEDIJK, Wouter BREVET
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Patent number: 10102412Abstract: A method of determining a physical property of a finger using a sensor 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. For each measuring element position, the method comprises the steps of performing a first sensing operation using a first capacitive configuration, acquiring a first measurement value for the first capacitive configuration, performing a second sensing operation using a second capacitive configuration, acquiring a second measurement value for the second capacitive configuration. The physical property of the finger is determined based on the first and second measurement values for each measuring element position.Type: GrantFiled: June 15, 2017Date of Patent: October 16, 2018Assignee: FINGERPRINT CARDS ABInventors: Frank Riedijk, Hans Thörnblom
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Publication number: 20180137327Abstract: A method of determining a physical property of a finger using a sensor 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. For each measuring element position, the method comprises the steps of performing a first sensing operation using a first capacitive configuration, acquiring a first measurement value for the first capacitive configuration, performing a second sensing operation using a second capacitive configuration, acquiring a second measurement value for the second capacitive configuration. The physical property of the finger is determined based on the first and second measurement values for each measuring element position.Type: ApplicationFiled: June 15, 2017Publication date: May 17, 2018Applicant: Fingerprint Cards ABInventors: Frank Riedijk, Hans THÖRNBLOM
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FINGERPRINT SENSING USING MEASURING CONFIGURATIONS WITH DIFFERENT PRINCIPAL DIRECTIONS OF EXTENSIONS
Publication number: 20180137324Abstract: 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.Type: ApplicationFiled: November 8, 2017Publication date: May 17, 2018Applicant: Fingerprint Cards ABInventors: Frank RIEDIJK, Wouter BREVET, Hans THÖRNBLOM, Christer JANSSON -
Patent number: 9971926Abstract: 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.Type: GrantFiled: April 11, 2017Date of Patent: May 15, 2018Assignee: FINGERPRINT CARDS ABInventors: Frank Riedijk, Hans Thörnblom, Daniel Andersson
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Patent number: 9922231Abstract: 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.Type: GrantFiled: June 28, 2017Date of Patent: March 20, 2018Assignee: FINGERPRINT CARDS ABInventors: Frank Riedijk, Wouter Brevet, Lars Christensen, Søren Christensen, Michael Hansen
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Publication number: 20180012053Abstract: 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.Type: ApplicationFiled: March 21, 2017Publication date: January 11, 2018Inventors: Andreas Larsson, Frank Riedijk, Hans Thörnblom
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Patent number: 9864895Abstract: 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.Type: GrantFiled: March 21, 2017Date of Patent: January 9, 2018Assignee: FINGERPRINT CARDS ABInventors: Andreas Larsson, Frank Riedijk, Hans Thörnblom
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Patent number: 9842245Abstract: 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.Type: GrantFiled: June 14, 2017Date of Patent: December 12, 2017Assignee: FINGERPRINT CARDS ABInventors: Eric Setterberg, Frank Riedijk
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Publication number: 20170344780Abstract: 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.Type: ApplicationFiled: April 11, 2017Publication date: November 30, 2017Applicant: Fingerprint Cards ABInventors: Frank RIEDIJK, Hans THÖRNBLOM, Daniel ANDERSSON
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Publication number: 20080069413Abstract: The present invention relates to a fingerprint sensor element, comprising a sensor electrode (11) formed in an upper conducting layer (M3), a lower electrode (17, 32) formed in a lower conducting layer (M2, P2) and at least one insulating layer (8, 9, 10, 22) between the upper conducting layer (M3) and the lower conducting layer (M2, P2). It further comprises a charge amplifier (13) having a negative (12) and a positive (14) input terminal and an output terminal (18). An upper side (11a) of the fingerprint sensor electrode (11) is arranged for facing a finger (5) and a lower side (11b) is arranged for facing the lower electrode (17), and the fingerprint sensor electrode (11) and the lower electrode (17) are arranged in such a way that a capacitance (Cref) is formed between them.Type: ApplicationFiled: June 18, 2004Publication date: March 20, 2008Applicant: FINGERPRINT CARDS ABInventors: Frank Riedijk, Johan Hammersberg