Color display system

A color display system comprising a color display tube having multi-channel electrode means adjacent to a luminescent screen, the screen comprising a repeating pattern of three phosphor elements for luminescing in different colors respectively, the multi-channel electrode means providing at its output side an electron beam from each channel thereof in response to electrons being supplied to its input side, a pair of color selection electrodes associated with each channel of the multi-channel electrode means and disposed between an output side of the multi-channel electrode means and the luminescent screen which are operable to deflect an electron beam exiting from a channel of the multi-channel electrode means and by appropriate control of which the electron beam can be directed selectively onto each of a plurality of phosphor elements, and circuit means for selectively connected each of the color selection electrodes in each pair to three voltage levels, characterized in that the circuit means comprises a switching bridge circuit having two sets of two series-connected controlled semiconductor switching devices with a first end of each set connected to a source at a respective first voltage constituting a first voltage level and a second end of each set connected to a source at a respective second voltage constituting a second voltage level and with each set having an output intermediate the two semiconductor switching devices thereof connected to respective electrodes of each of the pairs of color selection electrodes, means for returning the voltages on the color selection electrodes to a respective intermediate third voltage level of a third voltage source, and signal generating means having outputs connected to the controlling electrodes of the semiconductor switching devices of both sets of two series-connected semiconductor switching devices for controlling switching of the devices, and hence, the voltage applied to the pairs of selection electrodes, in a predetermined sequence.