Graphic display systems

摘要

A graphic display system in which the lights of an array of lights arranged in dot matrix form are illuminated to produce the illusion of a moving sign displaying letters, words, numbers etc. in which use is made of the phenomenon of beta apparent motion to enable a moving image of a high resolution to be produced with the use of a small proportion for example 1/8, of the number of individual lights that would normally be considered necessary. The lights are preferably arranged in columns, lights in consecutive columns being illuminated in turn in the direction of apparent movement of the image.