Patents by Inventor Hugh C. Hilburn

Hugh C. Hilburn 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).

  • Halo generator for CRT display symbols
    Patent number: 4570182
    Abstract: An apparatus for generating halos about CRT display symbols, to distinguish them from background video, reads, from an image memory, video Bit signals corresponding to a CRT picture element P.sub.I,J, and the immediately surrounding CRT picture elements. A digital signal is generated therefrom representing a first Boolean Function. The intensity of the background illumination at P.sub.I,J, is unaltered, in response to a digital signal of zero, and is diminished by one-half, in response to a digital signal of one.
    Type: Grant
    Filed: November 18, 1983
    Date of Patent: February 11, 1986
    Assignee: Sperry Corporation
    Inventors: Michael J. Johnson, Hugh C. Hilburn
  • Dynamic focus control and power supply for cathode ray tube displays
    Patent number: 4258298
    Abstract: Apparatus is provided for effecting automatic dynamic compensation of the focal characteristics of electron beam tubes having substantially flat viewing faces, compensation in terms of two dynamic inputs including low frequency components primarily representing display brightness and high frequency components primarily representing electron beam displacement.
    Type: Grant
    Filed: December 28, 1979
    Date of Patent: March 24, 1981
    Assignee: Sperry Corporation
    Inventors: Hugh C. Hilburn, Thomas W. Spilsbury