Patents by Inventor John S. Childs

John S. Childs 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).

  • Video display driver with data enable learning
    Patent number: 8072394
    Abstract: Data enable learning is provided for a video display driver in which a data enable signal and pixel clock exclusive of their associated horizontal and vertical synchronization signals for a digital video signal are used to facilitate generating of signals corresponding to the associated horizontal and vertical synchronization signals.
    Type: Grant
    Filed: May 28, 2008
    Date of Patent: December 6, 2011
    Assignee: National Semiconductor Corporation
    Inventors: Christopher A. Ludden, John S. Childs
  • Raster-order pixel dithering
    Patent number: 7978200
    Abstract: Stochastic dithering may be used to reduce the size of the frame buffer and the complexity of the D/A Converters (DACs) in the drive circuitry that are used in a video display system. Hardware for stochastic dithering can be simplified when pixel data is presented in raster order. The hardware adds algebraic noise to the image to be dithered, and thresholds the result.
    Type: Grant
    Filed: December 28, 2006
    Date of Patent: July 12, 2011
    Assignee: National Semiconductor Corporation
    Inventors: Jeffrey A. Small, John S. Childs, Jeffrey Lillie, Vladimir Misic