Method of driving flat-panel display device

For driving a flat-panel display device having:

• a first electrode substrate including data lines, gate lines to form a matrix, pixel electrodes formed at intersections of the data and gate lines, respectively, and switch elements provided for the pixel electrodes, respectively, each of the switch elements being turned on and off by a gate signal passed through a corresponding one of the gate lines and connecting, if turned on, a corresponding one of the data lines to the corresponding pixel electrode to write sampled video data on the data line into the pixel electrode;
• a second electrode substrate including counter electrodes that face the pixel electrodes with a predetermined gap between them;
• an optical modulation layer sandwiched between the first and second electrode substrates;
• a data line driver for connecting “n” of the data lines to video bus lines and sampling video data for the n data lines in synchronization with a horizontal scan period;
• a gate line driver for supplying a gate signal to one of the gate lines in synchronization with a horizontal scan period;
• and
• an external driver for converting external video data into video data for “n” of the data lines and collectively supplying the video data to the video bus lines, a method comprising the steps of:
• preparing, for each horizontal scan period, a single compensation data (A) whose voltages are substantially equal to those of video data to be supplied to the video bus lines at the start of a write period of the horizontal scan period;
• and
• supplying the single compensation data (A) to the video bus lines during a blanking period of a horizontal scan period that just precedes the horizontal scan period.