Patents by Inventor Imre Knausz

Imre Knausz 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).

  • Publication number: 20210034834
    Abstract: A module configured to perform processing as part of a device capable of performing contactless or contact communication with a terminal. The module comprises: a biometric sensor; one or more display screens; and one or more control units configured to: cause the biometric sensor to capture biometric data of a user which can be used to biometrically authenticate the user; obtain biometric authentication information indicating whether the user was biometrically authenticated based on the captured biometric data; and in response to the biometric authentication information indicating the user was biometrically authenticated, select one or more categories of authenticated information from a plurality of categories of authenticated information based on one or more detected conditions, and cause the one or more display screens to display the one or more selected categories of authenticated information.
    Type: Application
    Filed: January 27, 2020
    Publication date: February 4, 2021
    Inventors: Thomas A. Mackin, Christopher A. Ludden, Imre Knausz, Alex Kucharczyk, Anne L. McAleer
  • Publication number: 20210034726
    Abstract: Biometric module configured to perform processing as part of a device configured to perform contactless or contact communication with a terminal, the module comprising: a biometric sensor; a display screen; and a control unit configured to: cause the biometric sensor to capture biometric data of a user which can be used to biometrically authenticate the user; obtain biometric authentication information indicating whether the user was biometrically authenticated based on the captured biometric data; and in response to the biometric authentication information indicating the user was biometrically authenticated, cause the display screen to display authenticated information.
    Type: Application
    Filed: July 30, 2019
    Publication date: February 4, 2021
    Inventors: Imre Knausz, Christopher A. Ludden
  • Patent number: 10691258
    Abstract: Systems and methods for reducing noise in sensors are described. In some embodiments, measurement values for selected pixels may be processed to remove signals that are common to groups of pixels. In some embodiments, offset values between pixel groups may be determined. In some embodiments, the determined offset values may be used to remove or suppress artificial discontinuities.
    Type: Grant
    Filed: January 12, 2018
    Date of Patent: June 23, 2020
    Assignee: IDEX Biometrics ASA
    Inventors: Jeffrey A Small, Kenneth Jeffrey Stern, Imre Knausz
  • Publication number: 20190220141
    Abstract: Systems and methods for reducing noise in sensors are described. In some embodiments, measurement values for selected pixels may be processed to remove signals that are common to groups of pixels. In some embodiments, offset values between pixel groups may be determined. In some embodiments, the determined offset values may be used to remove or suppress artificial discontinuities.
    Type: Application
    Filed: January 12, 2018
    Publication date: July 18, 2019
    Applicant: IDEX ASA
    Inventors: Jeffrey A. Small, Kenneth Jeffrey Stern, Imre Knausz
  • Patent number: 10311825
    Abstract: An LC display driver including a gamma reference circuit to generate N gamma-compensated reference voltages based on at least one pre-defined gamma curve divided into M regions defined by M+1 breakpoint voltages, each generated by a range-region DAC coupled to a subset of voltage taps of a range resistor string (some subsets overlapping). An output circuit generates the N gamma-compensated reference voltages, and includes a reference resistor string with N reference voltage taps, and M+1 breakpoint locations to receive respective breakpoint voltages, the N reference voltage taps divided into M subsets corresponding to the M regions of the gamma curve, each of the M subsets of reference voltage taps forming a voltage divider. N output selector circuits output a corresponding one of the N gamma-compensated reference voltages based on a respective reference voltage tap and the associated voltage divider.
    Type: Grant
    Filed: February 15, 2016
    Date of Patent: June 4, 2019
    Assignee: NATIONAL SEMICONDUCTOR CORPORATION
    Inventors: Christopher Ludden, Imre Knausz
  • Patent number: 9898121
    Abstract: A display device having an integrated capacitive proximity sensor comprises a plurality of sensor electrodes disposed as part of a display element of the display device. The plurality of sensor electrodes is configured for performing both sensor and display functions of the display device. The display device also comprises a sensor drive mechanism coupled with the plurality of sensor electrodes and configured for driving a first electrical signal on a first at least one sensor electrode of the plurality of sensor electrodes. The sensor drive mechanism comprises at least one memory element that is configured for selecting drive excitation information for the first at least one sensor electrode. The display device also comprises a display drive mechanism coupled with the plurality of sensor electrodes and configured for driving a second electrical signal on a second least one sensor electrode of the plurality of sensor electrodes.
    Type: Grant
    Filed: April 30, 2010
    Date of Patent: February 20, 2018
    Assignee: Synaptics Incorporated
    Inventors: Shahrooz Shahparnia, Imre Knausz, Joseph Kurth Reynolds
  • Patent number: 9865189
    Abstract: An example processing system for a display device includes driver circuitry and a control circuit. The driver circuitry is coupled to a plurality of source line nodes in the display device, each source line node of the plurality of source line nodes coupled to a plurality of subpixel columns through a demultiplexer having a plurality of switches. The control circuit is coupled to each demultiplexer. The control circuit is configured to operate each demultiplexer in a first mode by successively activating the respective plurality of switches, and in a second mode by concurrently activating the respective plurality of switches.
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: January 9, 2018
    Assignee: SYNAPTICS INCORPORATED
    Inventors: Imre Knausz, Jeffrey A. Small
  • Patent number: 9859913
    Abstract: A source driver including: a current source that provides an approximately constant current; a channel coupled to a source electrode and including a digital to analog converters (DAC), the DAC including: a voltage source that applies an output voltage to the source electrode based on the approximately constant current provided by the current source; and a control unit having circuitry that: inputs a digital value; and terminates, based on the digital value, charging of the voltage source by the approximately constant current; and a calibration unit having circuitry that: generates a comparison between a test voltage applied by the voltage source with a target voltage; and modifies the approximately constant current based on the comparison.
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: January 2, 2018
    Assignee: Synaptics Incorporated
    Inventors: Marshall Bell, Stephen Morein, Imre Knausz
  • Patent number: 9830032
    Abstract: Embodiments described herein include a display device having a capacitive sensing device, a processing system and a method for providing an adaptive low-power mode. In one embodiment, the method includes generating a reference voltage with one or more reference voltage generators while a display device is in a grayscale mode. The method also includes driving subpixels in the grayscale mode with the reference voltage. The method further includes shutting down the one or more reference voltage generators and driving subpixels in a low power, binary mode with a VCOM voltage based on positive and negative supply rails.
    Type: Grant
    Filed: July 31, 2015
    Date of Patent: November 28, 2017
    Assignee: SYNAPTICS INCORPORATED
    Inventors: Jeffrey A. Small, Imre Knausz
  • Patent number: 9653038
    Abstract: A source driver for a display, including: a current source that provides an approximately constant current; and multiple channels coupled to multiple source electrodes and including multiple digital to analog converters (DAC), each DAC including: a voltage source that applies a voltage to a source electrode based on the approximately constant current provided by the current source; and a control unit having circuitry that: inputs a digital value; and terminates, based on the digital value, charging of the voltage source by the approximately constant current.
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: May 16, 2017
    Assignee: Synaptics Incorporated
    Inventors: Marshall Bell, Stephen Morein, Imre Knausz
  • Patent number: 9621135
    Abstract: A voltage level shifter including a voltage converting unit to convert an input voltage into a current; a voltage level shifting unit to drive a driving voltage based on the current and shift a voltage level of the driving voltage when a modulation voltage is applied at a first voltage level to a floating ground; a circuit driving voltage supply unit to supply a circuit driving voltage and further to generate a shifted voltage level of the circuit driving voltage when the modulation voltage is applied at the first voltage level; and an output unit to supply an output voltage based on the circuit driving voltage and the driving voltage, and further supply the output voltage at a second voltage level based on the shifted voltage level of the driving voltage and the circuit driving voltage when the modulation voltage is applied at the first voltage level is disclosed.
    Type: Grant
    Filed: April 1, 2016
    Date of Patent: April 11, 2017
    Assignee: Atmel Corporation
    Inventors: Murat Ozbas, Christopher Ludden, Imre Knausz
  • Publication number: 20170092221
    Abstract: A source driver for a display, including: a current source that provides an approximately constant current; and multiple channels coupled to multiple source electrodes and including multiple digital to analog converters (DAC), each DAC including: a voltage source that applies a voltage to a source electrode based on the approximately constant current provided by the current source; and a control unit having circuitry that: inputs a digital value; and terminates, based on the digital value, charging of the voltage source by the approximately constant current.
    Type: Application
    Filed: September 30, 2015
    Publication date: March 30, 2017
    Inventors: Marshall Bell, Stephen Morein, Imre Knausz
  • Publication number: 20170093421
    Abstract: A source driver including: a current source that provides an approximately constant current; a channel coupled to a source electrode and including a digital to analog converters (DAC), the DAC including: a voltage source that applies an output voltage to the source electrode based on the approximately constant current provided by the current source; and a control unit having circuitry that: inputs a digital value; and terminates, based on the digital value, charging of the voltage source by the approximately constant current; and a calibration unit having circuitry that: generates a comparison between a test voltage applied by the voltage source with a target voltage; and modifies the approximately constant current based on the comparison.
    Type: Application
    Filed: September 30, 2015
    Publication date: March 30, 2017
    Inventors: Marshall Bell, Steve Morein, Imre Knausz
  • Publication number: 20170092171
    Abstract: An example processing system for a display device includes driver circuitry and a control circuit. The driver circuitry is coupled to a plurality of source line nodes in the display device, each source line node of the plurality of source line nodes coupled to a plurality of subpixel columns through a demultiplexer having a plurality of switches. The control circuit is coupled to each demultiplexer. The control circuit is configured to operate each demultiplexer in a first mode by successively activating the respective plurality of switches, and in a second mode by concurrently activating the respective plurality of switches.
    Type: Application
    Filed: September 30, 2015
    Publication date: March 30, 2017
    Inventors: Imre KNAUSZ, Jeffrey A. SMALL
  • Publication number: 20170031428
    Abstract: Embodiments described herein include a display device having a capacitive sensing device, a processing system and a method for providing an adaptive low-power mode. In one embodiment, the method includes generating a reference voltage with one or more reference voltage generators while a display device is in a grayscale mode. The method also includes driving subpixels in the grayscale mode with the reference voltage. The method further includes shutting down the one or more reference voltage generators and driving subpixels in a low power, binary mode with a VCOM voltage based on positive and negative supply rails.
    Type: Application
    Filed: July 31, 2015
    Publication date: February 2, 2017
    Inventors: Jeffrey A. SMALL, Imre KNAUSZ
  • Publication number: 20160163277
    Abstract: An LC display driver IC suitable to drive source voltage signals to a liquid crystal display, and including an LCD source driver that can convert video image data into a selected one of N gamma-compensated analog gray-level source voltages corresponding to a respective one of the N gamma-compensated reference voltages, and drive out the selected gamma-compensated source voltage.
    Type: Application
    Filed: February 15, 2016
    Publication date: June 9, 2016
    Inventors: Christopher Ludden, Imre Knausz
  • Patent number: 9304625
    Abstract: Embodiments described herein synchronize a switching frequency of switched power supplies with timing events associated with updating a display screen or performing touch sensing. For example, a touch event may be the time needed for a touch controller to scan a plurality of sensing electrodes. Because noise is introduced each time switched power supplies switch between different stages, the touch controller may instruct a power management controller to switch between the stages (i.e., adjust the switching frequency) at the same time during each touch event. Even though the switched power supplies are permitted to introduce noise into the touch system, the noise happens at the same time during each touch event. Accordingly, the effect of the noise is the same for each touch event and is cancelled out. A similar process may be used for synchronizing the switching frequency to display events.
    Type: Grant
    Filed: June 28, 2013
    Date of Patent: April 5, 2016
    Assignee: SYNAPTICS INCORPORATED
    Inventors: Imre Knausz, Christopher Ludden, Thomas Mackin, Murat Ozbas, Mark Pude
  • Patent number: 9298314
    Abstract: Embodiments include a method (as well as an input device and processing system) that includes driving a display signal onto at least one of a plurality of display electrodes for updating a display, and driving an input sensing signal onto at least one of a plurality of sensor electrodes, where driving the input sensing and driving the display signal at least partially overlap in time. The method further includes receiving, using a coupling electrode disposed proximate to the at least one display electrode, a coupling signal that represents an effect of a signal on at least one of the display electrodes, on a signal on at least one of the sensor electrodes, acquiring resulting signals with at least one of the sensor electrodes, and adjusting the resulting signals based on the coupling signal.
    Type: Grant
    Filed: June 19, 2014
    Date of Patent: March 29, 2016
    Assignee: SYNAPTICS INCORPORATED
    Inventors: Imre Knausz, Eric Scott Bohannon, Christopher A. Ludden
  • Patent number: 9264682
    Abstract: An apparatus is provided, which includes a driving circuit. The driving circuit includes a gamma reference source and a liquid crystal display (LCD) source driver circuit. A first resistor string is provided. A plurality of digital-to-analog converters (DACs) are provided, where each DAC is coupled to the first resistor string. An output circuit having a second resistor string is provided so as to output a plurality of reference voltages. The LCD source driver circuit is coupled to the output circuit of the gamma reference source. The source driver is configured to receive the plurality of reference voltages, wherein the plurality of reference voltages are arranged in a first sequence during a positive polarity cycle and are arranged in a second sequence during a negative polarity cycle. The fifth sequence is an inverse of the fourth sequence.
    Type: Grant
    Filed: July 27, 2012
    Date of Patent: February 16, 2016
    Assignee: NATIONAL SEMICONDUCTOR CORPORATION
    Inventors: Christopher Ludden, Imre Knausz
  • Patent number: 9252651
    Abstract: A voltage drive circuit is constructed by stacking NMOS and PMOS transistors to provide high voltage levels with an output voltage swing greater than the breakdown voltage of the individual transistors used to build the voltage drive circuit. The voltage drive circuit may include a series stack of capacitors connected between gates of the stacked PMOS and NMOS transistors. The capacitive loading causes the gate signals to change more synchronously. Errors in timing for these gate signals, which would otherwise result in damage from exceeding the breakdown voltage across a pair of terminals of one of the NMOS and PMOS transistors, are mollified.
    Type: Grant
    Filed: June 20, 2012
    Date of Patent: February 2, 2016
    Assignee: SYNAPTICS INCORPORATED
    Inventors: Brian Mott, Imre Knausz