Patents by Inventor Ik H. Moon

Ik H. Moon 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).

  • Synchronizing signal automatic selecting circuit
    Patent number: 4894719
    Abstract: A synchronizing signal automatic selecting circuit comprising a signal inverter for inverting synchronizing signal from a synchronizing signal separating circuit, a synchronizing signal detector for detecting synchronizing signal when a synchronizing signal is inputted to a horizontal and horizontal/vertical synchronizing signal input terminal and grounding the output signal of the signal inverter, a polarity detecting circuit for detecting the synchronizing signal polarity of the horizontal and horizontal/vertical synchronizing signal input terminal and a vertical synchronizing signal separator for separating the vertical synchronizing signal from the output signal of a transistor. The circuit is designed to automatically select with priority the synchronizing signal where the composite video signal and the synchronizing signal are inputted at the same time to a monitor used for a peripheral equipment of a computer without using a switch.
    Type: Grant
    Filed: July 25, 1988
    Date of Patent: January 16, 1990
    Assignee: Goldstar Co., Ltd.
    Inventor: Ik H. Moon