PURPOSE: To make flickering hardly recognizable and to improve image quality by dispersing the timing for changing the brightness and darkness of the photoresponse of the pixel electrodes connected to row wirings in proximity.
CONSTITUTION: The polarity of an image signal Vsig when the potential Vc of a counter electrode is regarded as a potential reference is inverted ≥3 and ≤(L÷2) times per time Tf for writing the image signal Vsig for one sheet corresponding to all the picture elements of the liquid crystal display device having L pieces of the row wirings. In Fig., 960 pieces of the row wirings are attached with numbers from 1 up to 960 successively from the top end of the screen and are divided to five wiring groups by the remainder obtd. after two numbers are divided by 5. Namely, the pulses are successively impressed to one group 192 pieces of the row wirings and the polarity of the Vsig is inverted every time the row wiring group changes. The timing of the brightness and darkness of the photoresponse of the pixel electrodes connected to the row wirings in proximity shifts by about 0.5×Tf even at the Worst and the flickering is hardly recognizable.
MIYATA YUTAKA
YOSHIOKA TATSUO
SANO HIROSHI
FURUTA MAMORU
