Patent ID: 6452578
Filing Date: 2002-09-17
Classification: G09G

Abstract:
A method for driving a plurality of liquid crystals in accordance with a plurality of display data, each datum of said display data being defined by N digits describing a gray scale for display by a corresponding one of said plurality of liquid crystals, said plurality of liquid crystals being disposed between a plurality of data electrodes and a plurality of scanning electrodes, said method comprising:a first pulse-shape determining step of determining pulse shapes of scanning signals to be applied for one selection sub-period within a group of selection sub-periods collectively constituting a selection period within a frame period, said plurality of scanning electrodes being sub-divided into a plurality of scanning electrode groups, each of said scanning electrode groups including a predetermined number of scanning electrodes, said selection period being used to select one of said scanning electrode groups in accordance with an orthogonal function defining the pulse shapes of said scanning signals; a first signal application step for applying for the one selection sub-period to the predetermined number of scanning electrodes within said selected scanning electrode group, the scanning signals having the pulse shapes determined in said first pulse-shape determining step; a second pulse-shape determining step for determining a pulse shape of a data signal to be applied for an Mth sub-period division of L sub-period divisions collectively constituting one of said selection sub-periods within a selection period, where L is equal to or greater than N, the pulse shape being determined in accordance with first data values corresponding to the pulse shapes of the scanning signals determined in said first pulse-shape determining step and second data values corresponding to the Mth digit of the N digits of predetermined display data from said plurality of display data, said predetermined display data being applied to selected liquid crystals within said plurality of liquid crystals addressed by the scanning electrodes within said selected scanning electrode group and a selected data electrode; and a second signal application step for applying to said selected electrode during the Mth sub-period division, the data signal having the pulse shape determined in said second pulse-shape determining step.