A video surface is constructed by adjoining a large number of flat screen display devices together. Each screen on this surface is controlled by its own computer processor and these processors are networked together. Superimposed over this surface is a tiling of transparent touch-sensitive screens which...http://www.google.com.au/patents/US6377228?utm_source=gb-gplus-sharePatent US6377228 - Large-scale, touch-sensitive video display
