Anti-ferroelectric liquid crystal display with twisted director and perpendicular smectic layers

摘要

A liquid crystal display has a pair of transparent electrodes, an anti- ferroelectric liquid crystal therebetween, a polarizer and an analyzer attached to the electrodes. The smectic layers are perpendicular to the electrodes and the liquid crystal has a twisted structure. The directors on the surfaces on the two electrodes are symmetrically aligned with respect to the polarization axis of the polarizer so that the average optical axis of the liquid crystal coincides with the polarization axis of the polarizer. In absence of applied electric field, the incident light through the polarizer passes through the liquid crystal slab with maintaining its polarization. However, when an electric field is applied, the liquid crystal molecules experiences some degree of distortion and the average optical axis rotates. Therefore, the incident light passes through the liquid crystal slab with rotating the polarization.