in an odd-numbered frame, for example, a gradation voltage (indicated by “•” in FIG. 30), having a negative polarity relative to the common voltage (Vcom) being applied to the common electrode, is applied from a drain driver to an odd-numbered drain signal line; whereas, a gradation voltage (indicated by “∘” in FIG. 30), having a positive polarity relative to the common voltage (Vcom) being applied to the common electrode, is applied to an even-numbered drain signal line. Further, at an even-numbered line in an odd-numbered frame, a positive gradation voltage is applied from the drain driver to an odd-numbered drain signal line, and a negative gradation voltage is applied to an even-numbered drain signal line.
In addition, the polarity per each line is inverted for each frame. More specifically,as shown in FIG. 30, at an odd-numbered line of an even-numbered frame, a positive gradation voltage is applied from the drain driver to an odd-numbered drain signal line, and a negative gradation voltage is applied to an even-numbered drain signal line. Further, at an even-numbered line of the even-numbered frame, a negative gradation voltage is applied from the drain driver to an odd-numbered drain signal line, and a positive gradation voltage is applied to an even-numbered drain signal line.
By use of this dot inversion method, the voltages that are applied to neighboring drain signal lines are opposite in polarity to each other. Thus, it is possible to permit adjacent ones of the currents flowing in common electrodes and/or the gate electrodes of thin-film transistors (TFT) to cancel