Patent ID: 6229515
Filing Date: 2001-05-08
Classification: G09G

Abstract:
A liquid crystal display device comprising:a first substrate having lines of pixels, each line of pixels being connected to signal line electrodes;a second substrate;switching elements for selecting a line of said pixels;a liquid crystal material sandwiched between said first and said second substrates, the liquid crystal material displaying halftones, a color of the halftones being determined based on an amplitude of a driving signal and the liquid crystal material displaying the same color even if a polarity of the driving signal is reversed;driving means for supplying a driving signal having a predetermined polarity and an amplitude corresponding to a display color of each pixel to the signal line electrodes connected to a selected line of pixels, the polarity being constant for the line of pixels;polarity reversal means for selectively reversing the polarity of the driving signal supplied to said selected line of pixels; andcontrol means for controlling said switching elements and said polarity reversal means so as not to supply driving signals having the same polarity to a bundle of lines of pixels within one field,wherein a display area is divided into n sub-fields, each of the sub-fields is basically constituted by A.div.n.times.m (where A is a positive integer indicating the number of lines of pixels within one field, n is a positive integer ranging from 3 to A and indicating the number of sub-fields within one field, and m is a positive integer not larger than n) lines of pixels, and lines of pixels are selected, in each of the sub-fields, at one of: fixed intervals in groups of at least two lines of pixels; and variable intervals.