The invention concerns a display device for displaying graphical information, in the form of point patterns forming symbols of an arbitrary size and shape, each symbol being allocated a unique symbol code, as well as in the form of non-symbolic information, on a display unit (8) of a raster-scan type...http://www.google.fr/patents/US4780713?utm_source=gb-gplus-shareBrevet US4780713 - Display device
