HOLDING CHARACTERISTIC OF DARK STATE IN ANTIFERROELECTRIC LIQUID-CRYSTAL

The holding characteristic of the dark state of antiferroelectric liqu id crystal (AFLC) displays have a crucial effect on the contrast ratio . We have studied the dependence of the transmittance in the dark stat e on the waveform of the applied voltage in multiplex driving for seve ral materials. The samples used were ycarbonyl)phenyl-4'-octyloxybiphe nyl-4-carboxylate (MHPOBC) and its homologues. It was found that the h olding characteristics of the dark state are affected by the applied w aveforms and the chemical structures such as the type of chiral radica l and the length of the alkyl chain.