Liquid crystal display device and method of driving the same

A method for driving a liquid crystal panel, by supplying an image signal which is a picture-element signal corresponding to an image an a non-image signal which is independent from the image signal and is a picture-element signal for black display, the liquid crystal panel having source lines supplied with a picture-element signal, gate lines supplied with a scanning signal, and picture-element cells, of which transmittance is determined by an absolute value of an applied voltage, arranged on intersections of the source lines and the gate lines, the method comprising:

• a non-image write step of simultaneously writing the non-image signal in picture elements on n (n is equal to or greater than 2) neighboring gate lines and
• an image write step of sequentially writing the image signal on each gate line, wherein
• the non-image write step is carried out for a plurality of number of times in one frame period;
• at the image write step carried out immediately after the non-image write step is carried out, the image signal is written on a line which is different from the line on which the image signal is written for the non-image write step;
• in the non-image step signal supplied from the source lines, a polarity with reference to a reference potential is inversed at each non-image write step;
• and
• the image signal and the non-image signal on each gate line are synchronous in each frame period and polarities of the image signal and the non-image signal with reference to a reference potential are inversed.

A device for driving a liquid crystal panel, by supplying an image signal which is a picture-element signal corresponding to an image and a non-image signal which is independent from the image signal and is a picture-element signal for black display, the liquid crystal panel having source lines supplied with a picture-element signal, gate lines supplied with a scanning signal, and picture-element cells, of which transmittance is determined by an absolute value of an applied voltage, arranged on intersections of the source lines and the gate lines, wherein

• the driving means is operable to execute a non-image write step of simultaneously writing the non-image signal in picture elements on at least n (n is equal to or greater than 2) neighboring gate lines and an image write step of sequentially writing the image signal on each gate line;
• the non-image write step is carried out for a plurality of number of times in one frame period;
• at the image write step carried out immediately after the non-image write step is carried out, the image signal is written on a line which is different from the line on which the image signal is written at the non-image write step;
• in the non-image signal supplied from the source lines, a polarity with reference to a reference potential is inversed at each non-image write step;
• and
• the image signal and the non-image signal on each gate line are synchronous in each frame and polarities of the image signal and the non-image signal with reference to a reference potential are inversed.