Abstract
Scanning of more than 100 lines of a reflective twisted-nematic liquid-crystal matrix display with full contrast can be achieved using a two-frequency addressing scheme and a liquid crystal showing a dielectric anisotropy that is positive for low frequencies and negative for high frequencies. It is shown that the electric field inhomogeneity, caused by the large dielectric constants, changes the optical response to low and high frequencies as well as the angular dependence of the optical transmission.
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