Patents by Inventor Richard Jesse Mitchell

Richard Jesse Mitchell 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).

  • Apparatus and method of performing screen to screen blits in a color sliced frame buffer architecture
    Patent number: 6061069
    Abstract: A method and apparatus for moving pixel data from one area of a frame buffer to another in block fashion are provided. In one embodiment of the invention, pixel data is decomposed into its RGB component and each RGB component is stored into the frame buffer in a particular memory bank. The pixel data is moved by moving all the components of the data stored in a memory bank before moving the components in other memory banks.
    Type: Grant
    Filed: July 26, 1996
    Date of Patent: May 9, 2000
    Assignee: International Business Machines Corporation
    Inventors: Charles Ray Johns, Christopher Mark LeBlanc, Richard Jesse Mitchell, John Thomas Roberson
  • Storage of clipping plane data in successive bit planes of residual frame buffer memory
    Patent number: 5668979
    Abstract: A system and method for storing clipping, masking or stenciling plane data in an unused or residual portion of a frame buffer used with a graphics display. The clipping plane data corresponding to the pixels in the displayed portion of the frame buffer are effectively and efficiently stored through a folding type conversion of addresses. High speed address conversion for both rendering and accessing of clipping data is performed by hardware logic devices.
    Type: Grant
    Filed: January 6, 1995
    Date of Patent: September 16, 1997
    Assignee: International Business Machines Corporation
    Inventors: William Francis Lawless, Richard Jesse Mitchell