Patents by Inventor Stuart W. A. Hunt

Stuart W. A. Hunt 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).

  • Protection of cathode ray tubes
    Patent number: 5321339
    Abstract: To avoid burn in a scanning cathode ray tube, the address of the scanning spot at each clock period is recorded in a memory. During each frame period, the logarithms of the number of occurrences of each address are fed to a peak detector. The peak value is used to determine a maximum allowable beam current for the next frame. In another embodiment, the number of occurrences of each address during a line period is monitored and if this number exceeds a given number the CRT is blanked.
    Type: Grant
    Filed: July 17, 1992
    Date of Patent: June 14, 1994
    Assignee: Rank Cintel Limited
    Inventor: Stuart W. A. Hunt