A pixel device, comprising; a first plate, a second plate disposed under the first plate, and a third plate disposed under the second plate; a first power supply for providing a first voltage to the first plate; a second power supply for providing a second voltage to the second plate; and a third power...http://www.google.fr/patents/US7245285?utm_source=gb-gplus-shareBrevet US7245285 - Pixel device
