Patent ID: 6987509
Filing Date: 2006-01-17
Classification: G09G

Abstract:
1. A system for driving a flat panel display having electrodes, the system comprising: a register capable of storing a plurality of display bits each bit representing a next state for a corresponding electrode; a latch connected to the register and having outputs, each output representing a current state for a corresponding electrode; logic circuits corresponding to the electrodes, each logic circuit generating a plurality of control signals based on the next state and the current state of the corresponding electrode; and a plurality of change up switch elements, each change up switch element having an input connected to a change up control signal from a corresponding logic circuit, a first terminal connected to a change up signal, and a second terminal connected to the corresponding electrode; and a plurality of change down switch elements, each change down switch element having an input connected to a change down control signal from a corresponding logic circuit, a first terminal connected to a change down signal, and a second terminal connected to the corresponding electrode; and wherein the logic circuits are configured such that the logic circuit control signals substantially simultaneously connect the change up signal to electrodes having a low current state and a high next state, and the change down signal to electrodes having a high current state and a low next state; and an oscillator circuit having a first sinusoidal output connected to each change up switch element first terminal, and a second sinusoidal output connected to each change down switch element first terminal, wherein the oscillator circuit is configured such that signals at the first and second sinusoidal outputs are about 180 degrees out of phase with each other.