Liquid crystal composition and liquid crystal element

摘要

A novel smectic liquid crystal composition is disclosed. The smectic liquid crystal composition comprises at least, a dichroic dye, a dual-frequency switchable nematic liquid crystal and a smectic liquid crystal. The dielectric anisotropy of the composition changes from a positive value to a negative value with increasing a frequency of a field applied to the composition. A novel liquid crystal device is also disclosed. The device comprises a pair of electrodes of which at least one is a transparent electrode, and a layer between the pair of electrodes comprising the smectic liquid crystal composition.