VIDEO DISPLAY APPARATUS INCLUDING SCANNING BEAM VELOCITY MODULATION AT MULTIPLE SCANNING FREQUENCIES, AND METHOD FOR CONTROLLING SCANNING VELOCITY MODULATION THEREOF

摘要

A method for controlling scan velocity modulation in a video display apparatus operable at a plurality of horizontal scanning frequencies. The method comprises the steps of, generating respective scanning velocity modulation signals from signals having a plurality of horizontal scanning frequencies and coupled for display by said apparatus, and, selectively controlling an amplitude of each respective scanning velocity modulation signal to a predetermined range of amplitudes.