Patents by Inventor Dong Woo Rhee

Dong Woo Rhee 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).

  • Pulse width control and advancing circuit
    Patent number: 3949163
    Abstract: A signal receiver responsive to a composite signal with video and pulse signal information includes circuitry for developing pulse signals having a width greater than the pulse signals in the composite signal and for effecting an advance in one of the developed signals with respect to one of the pulse signals of the composite signal whereby the pulse signals are removed from the composite signal to permit employment of the video information for determining the black level of a display.
    Type: Grant
    Filed: February 27, 1974
    Date of Patent: April 6, 1976
    Assignee: GTE Sylvania Incorporated
    Inventor: Dong Woo Rhee
  • Automatic video signal control circuit
    Patent number: 3947631
    Abstract: An automatic video signal control circuit for a television receiver includes apparatus for generating horizontal and vertical pulse signals to effect cancellation of the horizontal and vertical blanking pulse signals in a received television signal and for providing a video signal having a black level derived from the peak black level in the video portion of the received signal and a white level derived from the combined average and peak white level in the video portion of the received signal.
    Type: Grant
    Filed: February 27, 1974
    Date of Patent: March 30, 1976
    Assignee: GTE Sylvania Incorporated
    Inventors: Dong Woo Rhee, Joseph Edward Thomas