Patent ID: 6191769
Filing Date: 2001-02-20
Classification: G09G

Abstract:
A liquid crystal display device comprising:a plurality of signal lines and a plurality of scanning lines that are arranged in lattice form;pixel electrodes that are arranged in matrix form at crossing portions of the signal lines and the scanning lines, a display voltage being written to each of the pixel electrodes from one of the signal lines electrically connected thereto in a display voltage writing state that is established when a corresponding one of the scanning lines is selected;an counter electrode that is opposed to the pixel electrodes;a liquid crystal layer provided between the pixel electrodes and the counter electrode;a signal line driver for sequentially transferring display voltages having alternate polarities to the signal lines;a scanning line driver for selectively driving the scanning lines to thereby allow display voltages to be written to part of the pixel electrodes corresponding to a selected scanning line; andcontrol means for causing, when a polarity of display voltages to be supplied to a particular one of the signal lines in one field or frame is opposite to a polarity of display signals that were supplied to the same signal line in a preceding field or frame, the signal line driver to supply display voltages to pixel electrodes corresponding to a next signal line after inserting a dummy cycle having a predetermined interval.