Vertical pin distortion correction apparatus and method for a multi-scan display

A method for providing image distortion correction for a multi-frequency display system, comprising:

• generating a first signal based on a correction signal, on a horizontal synchronization signal, and on a vertical synchronization signal;
• generating a deflection signal based on the first signal and the vertical synchronization signal, the deflection signal being operable within a frequency range;
• receiving a video input signal and the deflection signal;
• and
• generating an output video signal based on the deflection signal and the video input signal,
• wherein generating the deflection signal comprises:
• amplifying the vertical synchronization signal;
• generating a second signal based on the first signal;
• filtering the second signal;
• adding the filtered second signal to the vertical synchronization signal to provide an output signal.

An image correction apparatus for a multi-frequency display system, comprising:

• a horizontal deflection circuit that generates a horizontal deflection signal based on a horizontal synchronization signal;
• a circuit that generates a first signal based on a correction signal, on the horizontal synchronization signal, and on a vertical synchronization signal;
• a vertical deflection circuit that generates a vertical deflection signal based on the first signal and the vertical synchronization signal, the vertical deflection circuit being operable within a range of frequencies;
• and
• a display coupled to receive a video input signal, the horizontal deflection signal and the vertical deflection signal, the display generating an output video signal based on the video input signal, the horizontal deflection signal and the vertical deflection signal,
• wherein the vertical deflection circuit comprises:
• an amplifier circuit having one input coupled to receive the vertical synchronization signal;
• an output circuit having a vertical deflector and a filter coupled in series with the vertical deflector, the output circuit being coupled at a first end to an output of the amplifier circuit, the output circuit providing the output signal at a second end of the output circuit.