A color display system for use in stadiums, arenas or streets has a matrix of three-primary triads of light-emitting elements controlled by electric signals for displaying images, characters, and/or other patterns in colors. The color display system comprises display units arrayed in horizontal rows...http://www.google.es/patents/US4720709?utm_source=gb-gplus-sharePatente US4720709 - Color display system utilizing a matrix arrangement of triads
Color display system utilizing a matrix arrangement of triads
