Patents by Inventor William R. Krenik

William R. Krenik 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).

  • Patent number: 10521041
    Abstract: A resonant line driver for driving capacitive-loads includes a driver series-coupled to an energy transfer inductor L1, driving signal energy at a signal frequency through L1. A switch array is controlled to switch L1 between multiple electrodes according to a switching sequence, each electrode characterized by a load capacitance CL. L1 and CL form a resonator circuit in which signal energy cycles between L1 and CL at the signal frequency. The switch array switches L1 between a current electrode and a next electrode at a zero_crossing when signal energy in the energy transfer inductor is at a maximum and signal energy in the load capacitance of the current electrode is at a minimum. An amplitude control loop controls signal energy delivered to the L1CL resonator circuit, and a frequency control loop controls signal frequency/phase. In an example application, the resonant driver provides line drive for a mutual capacitance touch screen.
    Type: Grant
    Filed: August 13, 2015
    Date of Patent: December 31, 2019
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Vadim V. Ivanov, William R. Krenik, Rajarshi Mukhopadhyay, Baher S. Haroun
  • Patent number: 10179081
    Abstract: One aspect of the disclosure provides a binocular viewing system. In one embodiment, the binocular viewing system includes a binocular viewer and a computer. The binocular viewer has left and right display screens and a variable focal depth optical subsystem located in an optical path between and separate from the display screens and a user when the user uses the binocular viewer. The computer is configured to provide control signals to the binocular viewer. The control signals are operable to place images on the left and right display screens and vary a focal depth of the variable focal depth optical subsystem. The images include a plurality of objects controlled by the variable focal depth optical subsystem to make at least one of the plurality of objects appear closer to the user and at least one of another of said plurality of objects appear farther away from the user.
    Type: Grant
    Filed: October 30, 2015
    Date of Patent: January 15, 2019
    Assignee: VITAL ART AND SCIENCE, LLC
    Inventor: William R. Krenik
  • Patent number: 10031875
    Abstract: A switch monitoring system is provides information on sensor readings and contact closures over a one-wire network or a loop.
    Type: Grant
    Filed: January 22, 2015
    Date of Patent: July 24, 2018
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: William R. Krenik, Matthew R. Webb, Deric W. Waters, Anand G. Dabak, Srinath Hosur
  • Patent number: 9746970
    Abstract: A touch screen system includes a capacitive touch screen (1) including a plurality of row conductors (7-1, 2 . . . n) and a column conductor (5-1). A plurality of contemporaneous orthogonal excitation signals (S1(t), S2 (t) . . . Sn(t)) are simultaneously driven onto the row conductors, respectively. The capacitively coupled signals on the column conductor may be influenced by a touch (10) on the capacitive touch screen. Receiver circuitry (50) includes a sense amplifier (21-1) coupled to generate an amplifier output signal (r1(t)) in response to signals capacitively coupled onto the column conductor. WHT-based circuitry (35) determines amounts of signal contribution capacitively coupled by each of the excitation signals, respectively, to the amplifier output signal.
    Type: Grant
    Filed: November 5, 2013
    Date of Patent: August 29, 2017
    Assignee: Intel Corporation
    Inventors: William R. Krenik, Anand Dabak
  • Patent number: 9498118
    Abstract: In one aspect, there is provided a handheld vision tester. In this particular embodiment, the handheld vision tester comprises a display, cursor control, and an interface port. The display delivers vision tests to a user. The user interacts with the vision tests by using the display and cursor control. The interface port allows for communication of results of the vision tests from the handheld tester to external devices.
    Type: Grant
    Filed: April 17, 2015
    Date of Patent: November 22, 2016
    Assignee: Vital Art & Science Incorporated
    Inventors: Mike Bartlett, William R. Krenik, Yi-Zhong Wang
  • Patent number: 9345401
    Abstract: In one aspect, there is provided an embodiment of a calibration system for use with a vision tester having a display. In this particular embodiment, the calibration system comprises a calibration stand and a reflective surface. The calibration stand is configured to hold the vision tester. The reflective surface is coupled to the calibration stand and is oriented substantially parallel to the display. The calibration stand is configured to hold the display of the vision tester at a fixed distance from the reflective surface.
    Type: Grant
    Filed: April 17, 2015
    Date of Patent: May 24, 2016
    Assignee: VITAL ART AND SCIENCE, LLC
    Inventors: Michael Bartlett, William R. Krenik, Yi-Zhong Wang
  • Publication number: 20160045388
    Abstract: One aspect of the disclosure provides a binocular viewing system. In one embodiment, the binocular viewing system includes a binocular viewer and a computer. The binocular viewer has left and right display screens and a variable focal depth optical subsystem located in an optical path between and separate from the display screens and a user when the user uses the binocular viewer. The computer is configured to provide control signals to the binocular viewer. The control signals are operable to place images on the left and right display screens and vary a focal depth of the variable focal depth optical subsystem. The images include a plurality of objects controlled by the variable focal depth optical subsystem to make at least one of the plurality of objects appear closer to the user and at least one of another of said plurality of objects appear farther away from the user.
    Type: Application
    Filed: October 30, 2015
    Publication date: February 18, 2016
    Inventor: William R. Krenik
  • Publication number: 20160048260
    Abstract: A resonant line driver for driving capacitive-loads includes a driver series-coupled to an energy transfer inductor L1, driving signal energy at a signal frequency through L1. A switch array is controlled to switch L1 between multiple electrodes according to a switching sequence, each electrode characterized by a load capacitance CL. L1 and CL form a resonator circuit in which signal energy cycles between L1 and CL at the signal frequency. The switch array switches L1 between a current electrode and a next electrode at a zero_crossing when signal energy in the energy transfer inductor is at a maximum and signal energy in the load capacitance of the current electrode is at a minimum. An amplitude control loop controls signal energy delivered to the L1CL resonator circuit, and a frequency control loop controls signal frequency/phase. In an example application, the resonant driver provides line drive for a mutual capacitance touch screen.
    Type: Application
    Filed: August 13, 2015
    Publication date: February 18, 2016
    Inventors: Vadim V. Ivanov, William R. Krenik, Rajarshi Mukhopadhyay, Baher S. Haroun
  • Publication number: 20150331776
    Abstract: A switch monitoring system is provides information on sensor readings and contact closures over a one-wire network or a loop
    Type: Application
    Filed: January 22, 2015
    Publication date: November 19, 2015
    Inventors: William R. Krenik, Matthew R. Webb, Deric W. Waters, Anand G. Dabak, Srinath Hosur
  • Patent number: 9186293
    Abstract: A binocular viewer, a method of measuring and training vision that uses a binocular viewer and a vision measurement and training system that employs a computer to control the binocular viewer. In one embodiment, the binocular viewer has left and right display elements and comprises: (1) a variable focal depth optical subsystem located in an optical path between the display elements and a user when the user uses the binocular viewer and (2) a control input coupled to the left and right display elements and the variable focal depth optical subsystem and configured to receive control signals operable to place images on the left and right display elements and vary a focal depth of the variable focal depth optical subsystem. In another embodiment, the binocular viewer lacks the variable focal depth optical subsystem, but the images include at least one feature unique to one of the left and right display elements.
    Type: Grant
    Filed: March 10, 2014
    Date of Patent: November 17, 2015
    Assignee: VITAL ART AND SCIENCE, LLC
    Inventor: William R. Krenik
  • Publication number: 20150223680
    Abstract: In one aspect, there is provided an embodiment of a calibration system for use with a vision tester having a display. In this particular embodiment, the calibration system comprises a calibration stand and a reflective surface. The calibration stand is configured to hold the vision tester. The reflective surface is coupled to the calibration stand and is oriented substantially parallel to the display. The calibration stand is configured to hold the display of the vision tester at a fixed distance from the reflective surface.
    Type: Application
    Filed: April 17, 2015
    Publication date: August 13, 2015
    Inventors: Mike Bartlett, William R. Krenik, Yi-Zhong Wang
  • Publication number: 20150216405
    Abstract: In one aspect, there is provided a handheld vision tester. In this particular embodiment, the handheld vision tester comprises a display, cursor control, and an interface port. The display delivers vision tests to a user. The user interacts with the vision tests by using the display and cursor control. The interface port allows for communication of results of the vision tests from the handheld tester to external devices.
    Type: Application
    Filed: April 17, 2015
    Publication date: August 6, 2015
    Inventors: Mike Bartlett, William R. Krenik, Yi-Zhong Wang
  • Patent number: 9033508
    Abstract: In one aspect, there is provided a handheld vision tester comprising a display, cursor control, interface port, and camera. The display delivers a series of images making up vision tests to a user who interacts with the vision tests by using the display and cursor control of the handheld vision tester. The camera verifies the user is taking the vision tests. The results of the vision tests are stored in the handheld communication device. The interface port allows for communication of the stored results of the vision tests with external devices. In another aspect, there is provided a calibration system for the handheld vision tester. The calibration system includes a stand to hold the handheld vision tester and a reflective surface substantially parallel to a display of the handheld vision tester.
    Type: Grant
    Filed: May 7, 2010
    Date of Patent: May 19, 2015
    Assignee: VITAL ART AND SCIENCE, LLC
    Inventors: Michael Bartlett, William R. Krenik, Yi-Zhong Wang
  • Patent number: 8796792
    Abstract: A MEMS may integrate movable MEMS parts, such as mechanical elements, flexible membranes, and sensors, with the low-cost device package, leaving the electronics and signal-processing parts in the integrated circuitry of the semiconductor chip. The package may be a leadframe-based plastic molded body having an opening through the thickness of the body. The movable part may be anchored in the body and extend at least partially across the opening. The chip may be flip-assembled to the leads to span across the foil, and may be separated from the foil by a gap. The leadframe may be a prefabricated piece part, or may be fabricated in a process flow with metal deposition on a sacrificial carrier and patterning of the metal layer. The resulting leadframe may be flat or may have an offset structure useful for stacked package-on-package devices.
    Type: Grant
    Filed: December 10, 2012
    Date of Patent: August 5, 2014
    Assignee: Texas Instruments Incorporated
    Inventors: Edgar Rolando Zuniga-Ortiz, William R. Krenik
  • Publication number: 20140192316
    Abstract: A binocular viewer, a method of measuring and training vision that uses a binocular viewer and a vision measurement and training system that employs a computer to control the binocular viewer. In one embodiment, the binocular viewer has left and right display elements and comprises: (1) a variable focal depth optical subsystem located in an optical path between the display elements and a user when the user uses the binocular viewer and (2) a control input coupled to the left and right display elements and the variable focal depth optical subsystem and configured to receive control signals operable to place images on the left and right display elements and vary a focal depth of the variable focal depth optical subsystem. In another embodiment, the binocular viewer lacks the variable focal depth optical subsystem, but the images include at least one feature unique to one of the left and right display elements.
    Type: Application
    Filed: March 10, 2014
    Publication date: July 10, 2014
    Applicant: VITAL ART AND SCIENCE INCORPORATED
    Inventor: William R. Krenik
  • Publication number: 20140144013
    Abstract: A method of fabricating a MEMS device is disclosed. A metal layer is provided over a first surface of a substrate including over an opening. The metal layer is patterned to define a membrane segment and a pad, with the membrane segment extending at least partially across the opening. An integrated circuit chip is attached over the opening to the membrane segment and pad, with the integrated circuit separated from an extending portion of the membrane segment by a gap. The integrated circuit chip includes a conductive member so that deflection of the extending portion relative to the conductive member can be measured as a change in capacitance.
    Type: Application
    Filed: February 6, 2014
    Publication date: May 29, 2014
    Applicant: Texas Instruments Incorporated
    Inventors: Edgar Rolando Zuniga-Ortiz, William R. Krenik
  • Patent number: 8722444
    Abstract: A method of fabricating a MEMS device is disclosed. A metal layer is provided over a first surface of a substrate including over an opening. The metal layer is patterned to define a membrane segment and a pad, with the membrane segment extending at least partially across the opening. An integrated circuit chip is attached over the opening to the membrane segment and pad, with the integrated circuit separated from an extending portion of the membrane segment by a gap. The integrated circuit chip includes a conductive member so that deflection of the extending portion relative to the conductive member can be measured as a change in capacitance.
    Type: Grant
    Filed: February 6, 2014
    Date of Patent: May 13, 2014
    Assignee: Texas Instruments Incorporated
    Inventors: Edgar Rolando Zuniga-Ortiz, William R. Krenik
  • Patent number: 8668334
    Abstract: A binocular viewer, a method of measuring and training vision that uses a binocular viewer and a vision measurement and training system that employs a computer to control the binocular viewer. In one embodiment, the binocular viewer has left and right display elements and comprises: (1) a variable focal depth optical subsystem located in an optical path between the display elements and a user when the user uses the binocular viewer and (2) a control input coupled to the left and right display elements and the variable focal depth optical subsystem and configured to receive control signals operable to place images on the left and right display elements and vary a focal depth of the variable focal depth optical subsystem. In another embodiment, the binocular viewer lacks the variable focal depth optical subsystem, but the images include at least one feature unique to one of the left and right display elements.
    Type: Grant
    Filed: February 27, 2007
    Date of Patent: March 11, 2014
    Assignee: Vital Art and Science Incorporated
    Inventor: William R. Krenik
  • Publication number: 20140055413
    Abstract: A touch screen system includes a capacitive touch screen (1) including a plurality of row conductors (7-1, 2 . . . n) and a column conductor (5-1). A plurality of cotemporaneous orthogonal excitation signals (S1(t), S2 (t) . . . Sn(t)) are simultaneously driven onto the row conductors, respectively. The capacitively coupled signals on the column conductor may be influenced by a touch (10) on the capacitive touch screen. Receiver circuitry (50) includes a sense amplifier (21-1) coupled to generate an amplifier output signal (r1(t)) in response to signals capacitively coupled onto the column conductor. WHT-based circuitry (35) determines amounts of signal contribution capacitively coupled by each of the excitation signals, respectively, to the amplifier output signal.
    Type: Application
    Filed: November 5, 2013
    Publication date: February 27, 2014
    Applicant: Texas Instruments Incorporated
    Inventors: William R. Krenik, Anand Dabak
  • Patent number: 8648430
    Abstract: A semiconductor-centered MEMS device (100) integrates the movable microelectromechanical parts, such as mechanical elements, flexible membranes, and sensors, with the low-cost device package, and leaving only the electronics and signal-processing parts in the integrated circuitry of the semiconductor chip. The package is substrate-based and has an opening through the thickness of the substrate. Substrate materials include polymer tapes with attached metal foil, and polymer-based and ceramic-based multi-metal-layer dielectric composites with attached metal foil. The movable part is formed from the metal foil attached to a substrate surface and extends at least partially across the opening. The chip is flip-assembled to span at least partially across the membrane, and is separated from the membrane by a gap.
    Type: Grant
    Filed: November 6, 2012
    Date of Patent: February 11, 2014
    Assignee: Texas Instruments Incorporated
    Inventors: Edgar R. Zuniga-Ortiz, William R. Krenik