| 摘要 |
PURPOSE:To preserve bistability by impressing bipolar pulses which invert a display to all picture elements at the time exclusive of an operating period. CONSTITUTION:The bipolar pulses which invert the display are impressed to all the picture elements at the time exclusive of the operating period of the liquid crystal electrooptical display device formed by sealing a ferroelectric liquid crystal 5 between two sheets of transparent substrates 1 and 10 with electrodes 2, 9, one of which substrates is subjected to an orientation treatment. Since the pulses to invert the display at the time exclusive of the displaying period are impressed, the spontaneous polarization always possessed by the liquid crystal is inverted and, therefore, the sweeping of the ions in the liquid crystal layer in one direction by the internal electric field is obviated. The bistability is maintained in this way. |
