Patent ID: 6727877
Filing Date: 2004-04-27
Classification: G09G

Abstract:
An in-plane switching type liquid crystal display device driven in accordance with an inversion-driving process, comprising:(a) a first substrate; (b) a second substrate; (c) a liquid crystal layer sandwiched between said first and second substrates wherein liquid crystal in said liquid crystal layer has a specific resistance in the range of 4.5Ã—1010 &OHgr;â€”cm and 2.0Ã—1013 &OHgr;Â·cm both inclusive; (d) a plurality of scanning lines arranged on said first substrate; (e) a plurality of signal lines arranged on said first substrate; (f) a plurality of first switches arranged at intersections of said scanning lines and said signal lines; (g) a plurality of pixel electrodes each electrically connected to each of said first switches; (h) a plurality of opposing electrodes each arranged in parallel with each of said pixel electrodes; and (i) a signal line driver which switches a first voltage for driving a positive pole and a second voltage for driving a negative pole at a predetermined interval in accordance with a gradation, and outputs said positive or negative driving voltage to said signal lines, said signal line driver compensating for said first and second voltages such that a difference between an average of said first and second voltages, associated with a maximum gradation, and an average of said first and second voltages, associated with a minimum gradation, is in the range of 0.2 to 0.9 volts both inclusive; wherein such a voltage is applied to said opposing electrodes that a flicker is not allowed to occur in a display where pixels displaying intermediate gradation and pixels displaying black are alternately arranged.