Method of driving display unit

A method of driving a display unit having matrix-arranged pixel electrodes each connected via a capacitor to a first line, each pixel electrode being connected to a switching transistor which is electrically connected to an image signal line and a scan signal line, and liquid crystal material held between said pixel electrode and an opposing electrode and being AC driven, said method comprising the steps of:

• transmitting an image signal voltage to said pixel electrode during an on-period of said switching transistor in response to a scanning signal applied to the scan signal line to which a gate of said switching transistor is connected,
• applying a constant voltage to said opposing electrode, and
• applying a modulating signal with its voltage level rising and falling from a preceding level alternately only once for each field to said first line during an off-period of said switching transistor after a predetermined delay from a termination of the scanning signal,
• wherein potential changes Cs/Ct.multidot.Ve(-) and Cs/Ct.multidot.Ve(+) of said pixel electrode respectively in negative and positive directions caused by the voltage level changes Ve(-) and Ve(+) through said storage capacitor are superposed on a potential change CgdVg/Ct of said pixel electrode caused by the scanning signal Vg through a parasitic capacitance between the gate and a drain of said switching transistor to satisfy the following relationship:
• CsVe(+)+CgdVg=CsVe(-)-CgdVg,
• where
• Cs is a capacitance of the storage capacitor,
• Cgd is the parasitic capacitance between the gate and drain of the switching transistor,
• Ct is a sum of all capacitances for one pixel,
• Ve(+) is the potential change of the pixel electrode in the positive direction,
• Ve(-) is the potential change of the pixel electrode in the negative direction, and
• Vg is the scanning signal,
• thereby to enable potentials respectively induced on said pixel electrode in even and odd fields to be equal to each other,
• thereby to eliminate a DC voltage caused by a capacitance of said liquid crystal material held between the image signal line and the pixel electrode, the image signal line and the opposing electrode and the pixel electrode and the opposing electrode.