An electrophoretic display liquid composition for use in an electrophoretic display device that has a multiplicity of individual reservoirs, each containing the display liquid of at least two sets of particles dispersed in a transparent liquid system, the at least two sets of particles exhibiting different,...http://www.google.de/patents/US6525866?utm_source=gb-gplus-sharePatent US6525866 - Electrophoretic displays, display fluids for use therein, and methods of displaying images
