Patents by Inventor Robert LeRoy Murphy

Robert LeRoy Murphy 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).

  • Digital driving circuits, methods and systems for display devices
    Patent number: 9852702
    Abstract: A method may include generating display driver signals that vary between only two levels and applying the display driver signals to opposing electrodes of a display segment within a display device. An intrinsic capacitance of the display device filters the display driver signals to generate different analog signal levels at the display segment of the display device. The method varies the pulse density of the display driver signals to select or de-select the display segment based on an average voltage magnitude across the display segment over a time period. The display segment is activated when the average voltage magnitude exceeds a threshold value.
    Type: Grant
    Filed: April 22, 2014
    Date of Patent: December 26, 2017
    Assignee: Cypress Semiconductor Corporation
    Inventors: David Van Ess, Christopher Corson Keeser, Robert LeRoy Murphy, David G. Wright
  • DIGITAL DRIVING CIRCUITS, METHODS AND SYSTEMS FOR LIQUID CRYSTAL DISPLAY DEVICES
    Publication number: 20140267216
    Abstract: A method may include generating display driver signals that vary between only two levels and applying the display driver signals to opposing electrodes of a display segment within a display device. An intrinsic capacitance of the display device filters the display driver signals to generate different analog signal levels at the display segment of the display device. The method varies the pulse density of the display driver signals to select or de-select the display segment based on an average voltage magnitude across the display segment over a time period. The display segment is activated when the average voltage magnitude exceeds a threshold value.
    Type: Application
    Filed: April 22, 2014
    Publication date: September 18, 2014
    Applicant: CYPRESS SEMICONDUCTOR CORPORATION
    Inventors: David Van Ess, Christopher Corson Keeser, Robert LeRoy Murphy, David G. Wright