Patent ID: 7468717

Claim:
A display device comprising a plurality of pixel cells having a common electrode switchable between a high voltage V ITO — H and a low voltage V ITO — L said display device further comprising: a voltage controller connected to a multiplexing switch in each of said pixel cells to provide control signals to digitally select a switch-on state and a switch-off state to apply a high voltage and a low voltage on a pixel electrode in each of said pixel cells wherein said high and low voltage substantially equal to a voltage represented by V1 and V0 respectively wherein said voltage of V1 and V0 are different from voltages Vdd and Vss as as high and low rail voltages resepectively applied to a backplane of the display device; said voltage controller further includes a DC balancing state timing controller for synchronizing an inverting operation of said substantially V1 or V0 applied to said pixel electrode and controlling an inverter in each of said pixel cells with a common electrode DC-balancing switch between said high voltage V ITO — H and low voltage V ITO — L .