Patent ID: 6414694
Filing Date: 2002-07-02
Classification: H04N

Abstract:
A circuit for compensating a horizontal centering in a video display apparatus, comprising:a control unit for counting a frequency of video synchronizing signals to selectively output a first switching control signal and a second switching control signal based on a counted result of the frequency of the video synchronizing signals; a horizontal centering compensation circuit for providing a first power and a second power, said first power and said second power having voltage levels and directions different from each other, said horizontal centering compensation circuit selectively outputting said first power and said second power in response to a respective one of said first switching control signal and said second switching control signal from said control unit; and a horizontal deflection output circuit for receiving a driving power to generate a magnetic field for deflecting electron beams in said video display apparatus in response to a horizontal driving signal, said horizontal deflection output circuit variably adjusting a horizontal center position of a picture displayed on said video display apparatus in accordance with a selective output of said first power and said second power received from said horizontal centering compensation circuit.