THE DRIVING CIRCUIT OF LCD DEVICES

摘要

A driver circuit for LCD drives a liq. crystal panel in an A.C. manner. In this circuit, a display signal voltage to be applied to one electrode of the cell and a common voltage to be applied to a common electrode are inverted in their polarity with a certain period, respectively. At least the signal voltage and common voltage that are being polarity-inverted with the certain period is varied in its D.C. level by the same amount in the same direction in each period so that they can be adjusted so as to be in a predetermined relation for A.C. driving.