Cathode-ray tube display apparatus

Abstract

The present invention relates to a cathode-ray tube display apparatus having a flyback transformer. The apparatus comprises a vertical drive circuit for outputting a predetermined drive current; a vertical output part for outputting a vertical pulse for determining a vertical scanning interval according to an input vertical drive current; a vertical deflection yoke for deflecting a vertical scanning beam according to the vertical pulse; an up/down distortion compensator for generating a compensation signal by overlapping a vertical pulse which has passed the vertical deflection yoke and a horizontal pulse from the flyback transformer, and outputting a vertical drive current to the vertical output part by using the compensation signal and the drive current output from the vertical drive circuit; and a controller for changing a signal gain of the compensation signal generated from the up/down distortion compensator according to a vertical frequency of a recovered broadcasting signal to a predetermined width.

Dependencies are inferred from the claim text.