Flat cathode tube deflection waveforms

The field scan waveform for an electrostatically deflected cathode ray tube having its electron gun placed to project a beam of electrons towards the screen from one side includes a component at line scan frequency to correct distortion of the raster due to the tube geometry. It is essential that the line scan frequency component is synchronized with the line scan deflection waveform which means that the flybacks must be described in the same time interval. A substantial saving in the power needed to produce the line scan waveform is obtained by arranging the field scan waveform to be such that the flyback portions of the line scan frequency component be performed in such directions as to reduce the field scan deflection. This enables the field scan amplifiers to use higher value collector resistances to achieve the charging and discharging of the circuit capacitances as required during the line flyback interval. The power consumption of the field scan amplifiers is thereby reduced.