PROBLEM TO BE SOLVED: To provide a novel antiferroelectric liquid crystal device for affording a display of a wide visual angle, large contrast ratio, high-speed response and low-voltage operation by incorporating a specific compd. into an antiferroelectric material. SOLUTION: The antiferroelectric material of this liquid crystal display contains the compd. expressed by the formula. In the formula, a denotes from 1 to 16; b denotes 1 or 2; c denotes from 1 to 14; n, p and r respectively independently denote 0 or 1. A ring A and a ring B are respectively independently selected from the group consisting of cyclohexyl, non-substd. phenyl, monofluorophenyl, difluorophenyl, dioxanyl, pyrimidyl and pyridinyl. X is either of H or F and Y and Z are respectively independently selected from the group consisting of C-C, C≡C, CO2, O2C and O. In addition, (*) denotes an asymmetric carbon atom.
ANTIFERROELECTRIC LIQUID CRYSTAL DISPLAY DEVICE AND ANTIFERROELECTRIC COMPOUND AND COMPOSITION USER FOR THE DEVICE