Very large color video matrix display apparatus with constant- current display cells driven by pulse-width-modulated video signals

摘要

A video display system is disclosed, which includes a display device including a plurality of luminescent display cells arranged in an X-Y matrix form, each of the display cells having a cathode, a grid and a luminescent target electrode, a video signal source for supplying a video signal and a driving circuit for supplying the video signal to each of the display cells such that each of the display cells is turned on and off in accordance with the level of the video signal and a picture is reproduced on the display device. A driving circuit turns on each of the display cells such that a constant current flows therethrough so that a display with a very uniform brightness is obtained.