Liquid crystal display element
AssigneeMerck Patent GmbH
InventorsLudwig Pohl, Rudolf Eidenschink, Fernando del Pino, Georg Weber
Life of this patent
Estimating the term…
Abstract
Liquid crystal display elements based on a twisted nematic cell are almost free from interference colors and show only a very little angular dependence of the contrast, if the product of the layer thickness and the optical anisotropy of the liquid crystalline dielectric has a value of 150 to 600 nanometers.
Claims11
In a liquid crystal display element based on a twisted nematic cell the improvement wherein the product of the layer thickness and the optical anisotropy of the liquid-crystalline dielectric has a value of 150 to 600 nm.
A method of operating a liquid crystal display element based on a twisted nematic cell so that it possesses a lower degree of interference colors and a lower dependence of contrast on viewing angle, comprising, operating the twisted nematic cell element with a dielectric whose layer thickness and optical anisotropy are such that the product of layer thickness and optical anisotropy has a value of 150-600 nm.
Dependencies are inferred from the claim text.