The electro-optic properties of a liquid-crystal display associated with a homeotropic to multidomainlike transition for a liquid crystal with a positive dielectric anisotropy have been investigated. The cell plates are prepared in such a way that, in the absence of an electric field, the liquid-crystal alignment is homeotropic. an electric field created by interdigitated electrodes on both substrates causes a director deformation of a multidomain type. The display shows wide viewing angle, excellent color characteristics, and a fast response time. The molecular director configuration, together with the electro-optic characteristics of the device, are discussed in this letter.
The electro-optic properties of a novel liquid crystal device associated with a homogeneous to twisted-planar ͑HTP͒ transition have been investigated. The cell plates are prepared in such a way that in the absence of an electric field the liquid crystal orientation is uniform throughout the cell, and thus between crossed polarizers the cell appears black ͑off state͒. When an electric field of a particular configuration is applied, a 90°twist is imposed, and the cell transmits light ͑on state͒. It was found that the HTP device exhibits wide viewing angle and excellent color characteristics. The dependence of the electro-optic effect on rubbing directions and cell gap has also been investigated.
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