METHOD FOR DECREASING IONIC MEMORY EFFECT OF FERROELECTRIC LIQUID CRYSTAL MATERIAL, FERROELECTRIC LIQUID CRYSTAL CELL, FERROELECTRIC LIQUID CRYSTAL DEVICE AND OPTICAL MODULATION DEVICE

摘要

PROBLEM TO BE SOLVED: To decrease the ionic memory effect of a ferroelectric liquid crystal material. SOLUTION: The method for decreasing the effect of the ionic memory of a ferroelectric liquid crystal(FLC) material impressed with a blanking pulse 84 and strobe pulse 88 as switching pulses includes the following two steps: In the first step, an ionic dopant to impart ions having high-speed response to the impressed electric field is added to the FLC material, and in the second step, TRIFLE(technique to reduce ionic field latching effect) pulse 86, 90 are made to follow the blanking pulse 84 and the strobe pulse 88. The TRIFLE pulse 86, 90 are the pulses of reverse polarities which decrease the ionic counter- electric fields formed by the blanking pulse 84 and the strobe pulse 88 and do not unstabilize the state switched by the blanking pulse 84 and the strobe pulse 88.