Liquid Crystal Matrix Displays Using Additional Solid Layers for Suppression of Parasite Currents

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Abstract
Because of their light-scattering behavior under the influence of an electric field, liquid-crystal layers are suitable as active layers in flat picture screens. In screens built up as conducting-line-matrixes the cross-talk arising from parasite currents has to be suppressed. Besides that a display unit with a large-volume picture needs the ability to store the information, since liquid crystals have a long rise-time. It is shown that cross-talk is suppressed by combining a ferro-electric ceramic layer with the liquid-crystal layer in a liquid-crystal matrix using the non-linear properties of the ceramic, and that the necessary storage is obtained by the ceramic's ability to store polarization states. Further on it is shown by examples, that liquid crystal screens based on this double layer can be practical in a wide range.

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