Display control method having partial rewriting operation

A display control method for a liquid crystal display device, the liquid crystal display device comprising a ferroelectric liquid crystal interposed between a plurality of scanning electrodes and a plurality of signal electrodes, the scanning electrodes arranged in a first direction and the signal electrodes arranged in a second direction intersecting the first direction, wherein intersection areas of the scanning electrodes and signal electrodes are formed into picture elements, said method comprising:

• applying a selective voltage for rewriting the picture elements along a selected scanning electrode of a plurality of scanning electrodes;
• applying a non-selective voltage for not rewriting the picture elements along each non-selected scanning electrode of said plurality of scanning electrodes;
• and
• applying a signal voltage to the individual signal electrodes, said signal voltage corresponding to data to be displayed by the picture elements along the selected scanning electrode;
• the signal voltage being responsive to whether the picture element along the scanning electrode is changed from a bright display state to a dark display state, or from a dark display state to a bright display state, or the bright and dark display states are not changed;
• wherein, for each vertical scanning period, a partial rewriting operation is performed comprising:
• detecting for each scanning electrode whether there is a change in data to be displayed by the picture elements along that scanning electrode;
• applying in a predetermined sequence a selective voltage to each scanning electrode having a detected change;
• and applying a signal voltage to the signal electrodes corresponding to the detected change in data along each scanning electrode when the selective voltage is applied to that scanning electrode,
• wherein a transcribing operation to rewrite all of the picture elements within a preselected transcribing time period is conducted comprising:
• dividing the plurality of scanning electrodes into a plurality of sets, each set having a predetermined number of scanning electrodes,
• sequentially rewriting the picture elements along each scanning electrode in a selected set in one vertical scanning period, and
• rewriting all of the picture elements within said preselected transcribing time period;
• and
• wherein, during each vertical scanning period, the method comprises securing time for completing the partial rewriting operation to update the data to be displayed in picture elements having a detected change and securing time for rewriting the picture elements along the scanning electrodes in the selected set.