Liquid crystal display device
AssigneeU.S. Philips Corporation
InventorsDirk J. Broer, Johannes A. M. M. Van Haaren
Life of this patent
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Abstract
A liquid crystal display cell having a compensation layer of (polymer) material deposited from the gaseous phase. To obtain a smaller angle dependence, the birefringence of the compensation layer is rendered complementary to that associated with a given voltage across the liquid crystal cell by giving the optical axis of the compensation layer an angle to the direction transverse to the cell.
Claims13
A liquid crystal display device comprising a liquid crystal display cell having a layer of nematic liquid crystal material which is present between two substrates provided with electrodes, and having a polarizer and an optically anisotropic layer, the optically anisotropic layer comprising poly-p-xylylene or a derivative thereof.
A liquid crystal display device comprising a liquid crystal display cell having a layer of nematic liquid crystal material which is present between two substrates provided with electrodes, and having a polarizer and an optically anisotropic layer, the optical axis of the optically anisotropic layer extending at an angle to a direction transverse to the substrates, wherein the optically anisotropic layer comprises chlorinated poly-p-xylylene.
A liquid crystal display device comprising a liquid crystal display cell having a layer of nematic liquid crystal material which is present between two substrates provided with electrodes, and having a polarizer and an optically anisotropic layer, the optically anisotropic layer being provided by means of gaseous phase deposition, wherein the optically anisotropic layer has a surface structure on at least one of its boundary surfaces and a sawtooth structure on at least one of its boundary surfaces.
A liquid crystal display device comprising a liquid crystal display cell having a layer of nematic liquid crystal material which is present between two substrates provided with electrodes, and having a polarizer and an optically anisotropic layer, the optically anisotropic layer being provided by means of gaseous phase deposition, wherein the optically anisotropic layer comprises chlorinated poly-p-xylylene.
A liquid crystal display device comprising a liquid crystal display cell having a layer of nematic liquid crystal material which is present between two substrates provided with electrodes, and having a polarizer and an optically anisotropic layer, the optical axis of the optically anisotropic layer extending at an angle to a direction transverse to the substrates, wherein the optically anisotropic layer has a surface structure on at least one of its boundary surfaces and has a sawtooth structure on at least one of its boundary surfaces.
A liquid crystal display device comprising a liquid crystal display cell having a layer of nematic liquid crystal material which is present between two substrates provided with electrodes, and having a polarizer and an optically anisotropic layer, the optical axis of the optically anisotropic layer extending at an angle to a direction transverse to the substrates, wherein the optical axis of the optically anistropic layer is substantially parallel to the direction of the directors of the liquid crystal molecules, taken as an average across the layer of nematic liquid crystal material at a given voltage and wherein the optically anisotropic layer has a surface structure on at least one of its boundary surfaces and has a sawtooth structure on at least one of its boundary surfaces.
Dependencies are inferred from the claim text.