Patents by Inventor Donald D. Chovanec

Donald D. Chovanec 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).

  • Warm-up compensation system for picture tube
    Patent number: 4129885
    Abstract: An "instant play" type device is described for quickly bringing the video display of a television receiver to normal luminance. The device develops a start-up control voltage of an initially high magnitude and a nominal control voltage of lesser magnitude for successive application to the brightness control electrode of the cathode ray tube. When the television receiver is energized, the start-up control voltage is applied to develop a normal luminance display on the cathode ray tube after which the control electrode of the cathode ray tube is automatically switched to the nominal control voltage.
    Type: Grant
    Filed: October 3, 1977
    Date of Patent: December 12, 1978
    Assignee: Zenith Radio Corporation
    Inventor: Donald D. Chovanec