Abstract: The invention relates to a liquid-crystalline medium containing one or more compounds of the formula I and one or more compounds selected from the group of the compounds of the formula IA to IE in which R0, R1, R2, X0, X1, X2, A1, Z1, m, p, q, v have the meanings indicated in Claim 1, and to the use thereof in electro-optical liquid-crystal displays.

Abstract: The invention relates to an optically biaxial film comprising an anisotropic material with uniform helically twisted structure and a reflection wavelength below 400 nm, to methods and materials for its preparation, to its use as retardation or compensation film in optical devices like liquid crystal displays, and to compensators and liquid crystal displays comprising such a biaxial film.

Abstract: The instant invention relates to dielectrically positive nematic media comprising one, two or more compounds of formula I one or more compounds selected from the group of formulae II and III and one or more compounds selected from the group of formulae IV and V wherein the parameters are as defined in claim 1 with the proviso that the media comprise one or more compounds of formula III, wherein n and o both are 1 and all rings are 1,4-phenylene, which independently of each other optionally are fluorinated once or twice, and/or one or more compounds of formula V, wherein q is 2, as well as to liquid crystal displays comprising these media, especially to TN-displays and in particular to active matrix displays.

Abstract: The invention relates to a liquid-crystalline medium containing one or more compounds of the formula I and one or more compounds selected from the group of the compounds of the formula IA to IE in which R0, R1, R2, X1, X2, A1, Z1, m, p, q, v have the meanings indicated in claim 1, and to the use thereof in electro-optical liquid-crystal displays.

Abstract: The invention relates to a transflective liquid crystal display (LCD) with a polymerised LC film comprising at least one photoisomerisable compound and having a pattern of regions with different retardation and/or different orientation of the LC material.

Abstract: The instant invention relates to dielectrically positive nematic media comprising one, two or more compounds of formula I one or more compounds selected from the group of formulae II and III and one or more compounds selected from the group of formulae IV and V wherein the parameters are as defined in claim 1 with the proviso that the media comprise one or more compounds of formula III, wherein n and o both are 1 and all rings are 1,4-phenylene, which independently of each other optionally are fluorinated once or twice, and/or one or more compounds of formula V, wherein q is 2, as well as to liquid crystal displays comprising these media, especially to TN-displays and in particular to active matrix displays.

Abstract: The invention relates to an optically biaxial film comprising an anisotropic material with deformed helically twisted structure and locally varying birefringence, to methods and materials for its preparation, to its uses as retardation or compensation film in optical devices like liquid crystal displays, and to compensators and liquid crystal displays comprising such a biaxial film.

Abstract: The invention relates to an optically biaxial film with cholesteric structure, methods and materials for its preparation, its use as retardation or compensation film in optical devices like liquid crystal displays, and to compensators and liquid crystal displays comprising such a biaxial retardation film.

Abstract: The invention relates to a transflective liquid crystal display (LCD) with a polymerised LC film comprising at least one photoisomerisable compound and having a pattern of regions with different retardation and/or different orientation of the LC material.

Abstract: The invention relates to an optically biaxial film comprising an anisotropic material with uniform helically twisted structure and a reflection wavelength below 400 nm, to methods and materials for its preparation, to its use as retardation or compensation film in optical devices like liquid crystal displays, and to compensators and liquid crystal displays comprising such a biaxial film.

Abstract: The invention relates to an optically biaxial film comprising an anisotropic material with deformed helically twisted structure and locally varying birefringence, to methods and materials for its preparation, to its uses as retardation or compensation film in optical devices like liquid crystal displays, and to compensators and liquid crystal displays comprising such a biaxial film.

Abstract: The invention relates to a combination of optical films comprising a twisted A-plate retarder and a polarizer, its use in displays and optical elements, and to displays comprising such a combination.

Abstract: The present invention relates to a method of preparing a film that includes at least one layer of anisotropic polymer material. The method can include polymerizing a mixture of a filtered polymerizable mesogenic material.

Abstract: The invention relates to an optical compensator for liquid crystal displays comprising at least one O plate retarder, and at least one twisted A plate retarder with a twist angle ? of more than 90°, and further relates to a liquid crystal display comprising such a compensator.

Abstract: An achromatic quarter wave film (AQWF) comprising at least one quarter wave film (QWF) and at least one half wave film (HWF), each of said QWF and HWF comprising polymerized or vitrified anisotropic material, to methods and materials for the preparation of the AQWF, its use in optical devices like compensators and liquid crystal displays, and to a liquid crystal display comprising such an AQWF.

Abstract: The invention relates to a compensated liquid crystal display (LCD) of the In Plane Switching (IPS) mode and to a compensator for use in an IPS-LCD.

Abstract: The invention relates to an optical retardation film comprising two layers of an anisotropic polymer adjacent to each other or adjacent to both sides of a substrate, characterized in that each layer exhibits a tilted structure with an optical symmetry axis having a tilt angle ? relative to the plane of the layer, to a means to produce substantially linear polarized light comprising such an optical retardation film and to a liquid crystal display comprising such an optical retardation film.

Abstract: The invention relates to an alignment layer comprising a polymerized liquid crystal material with homeotrophic orientation, to methods of its preparation, to polymerizable liquid crystal compositions and liquid crystal polymers used for the preparation of the alignment layer, to liquid crystal devices comprising the alignment layer, and to a method of controlling the electrooptical steepness of a liquid crystal display comprising at least one alignment layer by varying the surface anchoring energy of the alignment layer.

Abstract: The invention relates to a combination of optical elements comprising at least one optical retardation film and at least one broadband reflective polarizer, characterized in that the optical retardation film is comprising at least one layer of an anisotropic polymer material having an optical symmetry axis substantially parallel to the plane of the layer, said optical retardation film being obtainable by polymerization of a mixture of a polymerizable mesogenic material comprising: a) at least one reactive mesogen having at least one polymerizable functional group; b) an initiator, c) optionally a non-mesogenic compound having two or more polymerizable functional groups; and d) optionally a stabilizer; and relates to an optical retardation film used in said combination of optical elements and to a liquid crystal display comprising said combination of optical elements.

Abstract: The invention relates to a liquid crystal display device comprising a liquid crystal cell and at least one compensation film or a combination of polarizer and optical compensators comprising at least one compensation film, said compensation film comprising at least one layer of an isotropic polymer obtainable by polymerization of a mixture of a polymerizable mesogenic material comprising: a) compound having one or two more polymerizable functional group, in the presences b) an initiator, c) optionally a non-polymerizable compound having two or more polymerizable functional groups and d) optionally a stabilizer, characterized in that said layer of an anisotropic polymer has a hometropic or tilted hometropic molecular orientation. The invention also relates to methods of manufacturing said compensation films. The invention further relates to mixtures of chiral polymerizable mesogenic material used for manufacturing of said compensation films.