Patent ID: 8610662
Filing Date: 2013-12-17
Classification: G09G

Abstract:
1. A method of driving an electrowetting display having a high quality display mode and a low power mode, the display including a plurality of electrowetting elements and comprising at least one first fluid and a second fluid immiscible with each other, each of said electrowetting elements comprising at least one surface area, wherein in a first, relatively low voltage, driving state of an electrowetting element said second fluid tends to cover said at least one surface area, and in a second, relatively high voltage, driving state of an electrowetting element said first fluid tends to cover said at least one surface area, the method comprising: providing a voltage booster circuit to generate a voltage signal to be applied across one or more selected ones of said plurality of electrowetting elements; and during driving of said one or more selected elements in said second driving state, selectively switching said voltage booster circuit on and off such that said voltage booster circuit is operative only some of the time and said voltage signal includes a voltage ripple variation; a magnitude of the voltage ripple variation being larger in the low power mode than in the high quality display mode.