PICTURE DISPLAY DEVICE WITH SYMMETRICAL DEFLECTION

摘要

A picture display device for displaying a picture by means of a line raster consisting of a plurality of lines which are successively scanned in the opposite direction comprises a video signal processing circuit for receiving an incoming video signal comprising video information and synchronising signals and for supplying the video information of a line in one direction and the video information of the subsequent line in the opposite direction, and a line deflection circuit (H) for generating a line deflection current through a line deflection coil (1). To minimise the power which is dissipated in the line deflection circuit, this circuit constitutes a self-oscillating stage with its natural frequency which is determined by a resonant network (1, 2) comprising the line deflection coil and which is independent of the frequency of the line synchronising signal in the incoming video signal.