ANTI-FERROELECTRIC LIQUID CRYSTAL CELL

摘要

PURPOSE: An anti-ferroelectric liquid crystal (AFLC) cell is provided, which has characteristics of high-speed response and broad visual field angle and generates no image persistence. CONSTITUTION: The AFLC is constituted by an AFLC material narrowly held between a pair of parallel substrates, wherein the AFLC material has such a characteristic that when a sine voltage value obtained by changing a reference frequency is applied to the AFLC cell, an imaginary part of a complex dielectric constant obtained by carrying out Fourier transform of an output voltage value outputted from the AFLC cell has no maximum value within a range of reference frequency of 100 Hz to 5 kHz. That is, this characteristic is equivalent to such a characteristic that when a real part and an imaginary part of the complex dielectric constant are plotted by Cole-Cole plot for every frequency, a curve having no maximum value within the range of reference frequency of 100 Hz to 5 kHz is obtained. Preferably the AFLC consists of a mixture of compounds of the formula 1, 2, 3 and 4 in the ratio of 52.5:22.5:15:22.5 (mol%), respectively.