Abstract: Conventional total internal reflection image displays consist of mobile particles of a single charge and capable of displaying information consisting of two different optical states. The reflective image display embodiments described herein comprises particles of different charge states and optical characteristics in combination with multi-electrode arrays. This may allow for displaying information consisting of at least three different optical states.

Abstract: Semi-retro-reflective, semi-specular, specular and etched glass displays are equipped with a dielectric layer. This leads to displays with enhanced brightness, improved electrophoretic particle responsiveness, improved grayscale and chemical stability in the presence of an electrophoretic medium, electric field and high temperatures. In one embodiment, a reflective image display comprises a front sheet further comprising a plurality of hemispherical protrusions, front and rear electrodes, a dielectric layer on the surface of at least one electrode, liquid medium with electrophoretically mobile particles, color filter array layer and a directional front light system.

Abstract: The invention relates to a liquid crystal medium with a highly twisted structure, to the use of said medium for optoelectronic applications in the fields of non-linear optics (NLO) and laser optics and to electrooptic devices, displays and lasers containing said medium.

Abstract: The invention relates to polymerizable charge transport compounds, their use as semiconductors or charge transport materials, in optical, electrooptical or electronic devices like for example organic field effect transistors (FET or OFET) for thin film transistor liquid crystal displays and integrated circuit devices such as RFID tags, electroluminescent devices in flat panel displays, and in plotovoltaic and sensor devices, and to a field effect transistor, light emitting device or ID tag comprising the polymerisable charge transport compounds.

Abstract: The invention is directed to the use of a liquid crystal composition in a bistable liquid crystal device and especially in a single polariser reflective or transflective zenithal bistable nematic liquid crystal device as well as a bistable liquid crystal device comprising the liquid crystal composition.

Abstract: The invention relates to novel 9- and/or 10-substituted anthracenes, to their use in liquid crystal, light-emitting or semiconducting materials and devices, in anisotropic polymers, optical, electrooptical, decorative, security, cosmetic, diagnostic, electric, electronic, charge transport, semiconductor, optical recording, electroluminescent, photoconductor or electrophotographic applications, and to liquid crystal, light-emitting and semiconducting materials, polymers and devices comprising them.

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 a liquid crystal medium with a highly twisted structure, to the use of said medium for optoelectronic applications in the fields of non-linear optics (NLO) and laser optics and to electrooptic devices, displays and lasers containing said medium.

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: Tetrahydropyran derivatives having at least one ester group (—CO—O—) and at least one group —CN, —NCS, —F, —Cl, —OCHF2, —OCF3, —CF3, —OCHFCF3, —OCF2CHFCF3, SF5, or —OCF2CF3; a process for preparing said tetrahydropyran derivatives, and the use of said tetrahydropyran derivatives as a component in a liquid crystal composition.

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: A tetrahydropyran derivative comprising at least three cyclic rings and one aromatic endgroup of the formula A a process for preparing said tetrahydropyran derivatives, and the use of said tetrahydropyran derivatives as a component in a liquid crystal composition.

Abstract: The invention relates to reactive thienothiophenes, their use as semiconductors or charge transport materials, in optical, electrooptical or electronic devices like for example organic field effect transistors (FET or OFET) for thin film transistor liquid crystal displays and integrated circuit devices such as RFID tags, electroluminescent devices in flat panel displays, and in photovoltaic and sensor devices, and to a field effect transistor, light emitting device or ID tag comprising the reactive thienothiophenes.

Abstract: The invention relates to polymerisable charge transport compounds, their use as semiconductors or charge transport materials, in optical, electrooptical or electronic devices like for example organic field effect transistors (FET or OFET) for thin film transistor liquid crystal displays and integrated circuit devices such as RFID tags, electroluminescent devices in flat panel displays, and in plotovoltaic and sensor devices, and to a field effect transistor, light emitting device or ID tag comprising the polymerisable charge transport compounds.

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 &thgr; 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: A liquid crystal display device containing a liquid crystal cell and at least one reflective polarizer or a polarizer combination having at least one reflective polarizer as a means to generate circular polarized light. The reflective polarizer includes an optically active layer of an anisotropic polymer material with a helically twisted planar molecular orientation. The material is oriented so that the axis of the molecular helix extends transversely to the layer, and the pitch of the molecular helix is varied in such a manner that the difference between the maximum pitch and the minimum pitch is at least 100 nm.

Abstract: Liquid crystal pigments comprising at least one layer of liquid crystalline polymer material with a helically twisted molecular structure wherein the helical axis is oriented substantially perpendicular to the plane of the layer and which show reflection of circularly polarized light, some prepared in which the bandwidth of the reflected wavelength band is at least 100 nm. These pigments are suitable for use in reflective films or coatings for decorative applications, cosmetic compositions, and pharmaceutical compositions, optical elements, and security applications.

Abstract: The invention relates to reactive thienothiophenes, their use as semiconductors or charge transport materials, in optical, electrooptical or electronic devices like for example organic field effect transistors (FET or OFET) for thin film transistor liquid crystal displays and integrated circuit devices such as RFID tags, electroluminescent devices in flat panel displays, and in photovoltaic and sensor devices, and to a field effect transistor, light emitting device or ID tag comprising the reactive thienothiophenes.

Abstract: The invention relativ to an electroptical system

Abstract: The invention relates to a method of preparing a broadband reflective polarizer comprising the blending a first mixture A comprising at least one achiral polymerizable mesogenic compound with a second mixture B comprising at least one chiral polymerizable mesogenic compound; and coating a layer of the blended mixture onto a first substrate and aligning the chiral mesogenic material in a planar orientation so that the axis of the molecular helix extends transversely to the layer.