Driving method for a display device

Claim 1

A driving method for a display device in which pixel electrodes each connected through a capacitance Cs to a first wiring for modulation signals are arranged in a form of a matrix, each of said pixel electrodes having transistor switching means the drain of which is electrically connected thereto, the source of which is electrically connected to an image signal wiring and the gate of which is electrically connected to a scan signal wiring, and said each of said pixel electrodes also being connected through a display material to a counter electrode for a counter voltage signal thereby to drive said display material with alternating current supply, said method comprising the steps of: applying a plurality of ON signal voltages consisting of one or more preliminary ON signals and a substantial ON signal to said switching means for each row of said matrix, said plurality of ON signal voltages being applied within a horizontal scanning period for each row of said matrix, all of said rows of said matrix being scanned via said scan signal wirings within a period of one field so as to transmit an image signal voltage via said image signal wirings to said pixel electrodes by way of said turned on switching means; supplying two types of modulation signals having different polarities alternately at every field to said first wirings during an OFF-period of said switching means; varying a part of the potential of said modulation signals before termination of the preliminary ON period for precharge of said plurality of ON signal voltages applied to said switching means, thereby varying the potential of said pixel electrodes; and superimposing the change of the potential of said pixel electrodes onto said image signal voltage thereby to apply a resultant voltage to said display material to be driven.