Liquid crystal display device having bistable nematic liquid crystal and

Abstract

A liquid crystal cell includes scanning and signal electrodes, and a bistable nematic liquid crystal material sealed therein. The material has liquid crystal molecules alignable in first and second metastable aligned states by selective application of twist select voltages smaller than a reset voltage after application of the reset voltage. A tilt angle of the liquid crystal molecules is controlled in the first and second metastable aligned states in accordance with an effective value of a voltage applied between the opposing electrodes. A row driver, in accordance with display data, supplies a reset potential for applying the reset voltage between the electrodes, and a write-period voltage for designating a period for applying a voltage with an effective value according to the display data between the electrodes, to scanning electrodes. A data driver, in accordance with the display data, supplies a metastable-aligned-state selecting voltage for selectively applying a first metastable-aligned-state selecting voltage and a second metastable-aligned-state selecting voltage between the electrodes, and a write voltage corresponding to the voltage with the effective value according to the display data, to the signal electrodes in synchronism with the reset voltage and said write-period voltage.