Electron multiplier flat CRT display apparatus providing successive color scanning lines for each scanning line of a received color video signal

Color display apparatus for received video signals representing three primary colors of successive picture elements on each of successive scanning lines of an image occurring at a scanning line frequency H, such apparatus including an electron multiplier color display tube which comprises:

• a display screen having thereon successive triads of phosphor stripes respectively electroluminescent in the respective primary colors;
• an electron gun producing a single electron beam which causes said stripes to luninesce when incident thereon;
• line-scanning means for deflecting said beam across the successive triads of color stripes;
• and a succession of color selection electrodes for selectively diverting said beam to respective color stripes in each of such triads;
• such apparatus being characterized in that it further includes a color selection circuit comprising:
• clock pulse generating means for controlling said line scanning means to deflect the electron beam at a line scanning frequency of substantially 3 H;
• first switching means for applying voltages to said color selection electrodes which are cyclically changed so as to cause said electrodes to divert said beam to successive color stripes in each of said triads at a frequency of substantially 3 H;
• and
• second switching means for receiving the three primary color video signals for each image scanning line and sequentially applying them to said electron gun during each such scanning line;
• whereby three primary color scanning lines are successively produced on said display screen corresponding to each of the image scanning lines of the received video signals.