Patent ID: 6424329
Filing Date: 2002-07-23
Classification: G09G

Abstract:
A system for driving a nematic liquid crystal in a liquid crystal display device in which the nematic liquid crystal is confined between a common electrode and a segment electrode that are placed between two polarizing plates, comprising:means for applying to said liquid crystal a voltage of a value corresponding to image data to be displayed; means for applying a constant voltage to said liquid crystal; means for switching application of said constant voltage and application of said voltage corresponding to image data to be displayed in a predetermined cycle; ratio of length of time for which said constant voltage is applied relative to length of time for which said voltage corresponding to image data to be displayed being constant; and one of said constant voltage and said voltage corresponding to image data to be displayed being applied to said liquid crystal after said voltages are switched, said nematic liquid crystal having electro-optical characteristics that exhibit a transmittance determined by one of the voltages without maintaining any prior hysteresis when said voltages are switched from one to the other.