Patent ID: 6160533
Filing Date: 2000-12-12
Classification: G09G

Abstract:
A method of driving a display panel where gradation display is conducted by applying a voltage between a pair of electrodes facing each other through a dielectric layer, comprising:generating a voltage having a plurality of voltage levels which increase stepwise with time at time intervals within a predetermined period and controlled by a clock signal, said predetermined period being equal to a horizontal scanning period and being based on a gradation clock signal in synchronization with said horizontal scanning period and said voltage being generated from a gradation data count and a reference voltage having a plurality of discrete voltage levels of constant amplitude increasing stepwise with time, the number of voltage levels of the reference voltage being equal to a maximum gradation data count;applying each of said stepwise voltage levels of said generated voltage to said electrodes when their respective time intervals correspond to a time when a gradation clock signal has elapsed; andholding said generated voltage in said dielectric layer between said electrodes for the remaining horizontal scanning period.