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AssigneeRockwell International Corporation
InventorsGene C. Koch, Bruce K. Winker, William J. Gunning, III
Estimating the term…
A twisted/splayed O-plate compensation device, in accordance with the invention, is comprised of an organic liquid crystal polymer thin film and possibly one or more other birefringent layers. The O-plate thin film is a birefringent medium with its optical symmetry axis, on average, oriented obliquely with the surface of the film. Within this constraint, the direction of the material's optical symmetry axis is allowed to vary continuously along the axis normal to the film surface. Such films may be fabricated by applying thin layers of chiral doped nematic or semectic liquid crystal monomer solutions in inert solvents to transparent substrates. The carrier solvents are then evaporated and the monomers polymerized by UV irradiation. Compensation devices may also be comprised of multiple layers of twisted/splayed O-plate material in conjunction with A-plates, C-plates, and simple O-plates. Fabrication techniques for twisted/splayed O-plates are described.
A compensator for a liquid crystal display, wherein:
A compensator for a liquid crystal display, said compensator comprising a layer of a birefringent material having an optical symmetry axis defined by a tilt angle, measured relative to the plane of the layer, and an azimuthal angle, measured relative to a reference axis in the plane of the layer, wherein said azimuthal angle varies along an axis normal to said layer, and said tilt angle is substantially fixed at an angle between approximately 25 degrees and approximately 65 degrees, along an axis normal to said layer.
A compensator for a liquid crystal display, said compensator comprising a layer of a birefringent material having an optical summetry axis defined by a tilt angle, measured relative to the plane of the layer, and an azimuthal angle, measured relative to a reference axis in the plane of the layer, wherein said tilt angle varies along an axis normal to said layer, and said azimuthal angle is substantially fixed along an axis normal to said layer.
A compensator for a liquid crystal display, said compensator comprising a layer of a birefringent material having an optical symmetry axis defined by a tilt angle, measured relative to the plane of the layer, and an azimuthal angle, measured relative to a reference axis in the plane of the layer, wherein each of said tilt angle and said azimuthal angle varies along an axis normal to said layer.
A compensator for a liquid crystal display, said compensator comprising a plurality of layers, each layer comprising a birefringent material having an optical symmetry axis defined by a tilt angle, measured relative to the plane of the layer, and an azimuthal angle, measured relative to a reference axis in the plane of the layer, wherein said azimuthal angle varies along an axis normal to said layer, and said tilt angle is substantially fixed at an angle between approximately 25 degrees and approximately 65 degrees, along an axis normal to said layer, wherein the optical symmetry axes of adjacent said layers vary azimuthally in a positive sense and a negative sense respectively.
A compensator for a liquid crystal display, said compensator comprising a plurality of layers, each layer comprising a birefringent material having an optical symmetry axis defined by a tilt angle, measured relative to the plane of the layer, and an azimuthal angle, measured relative to a reference axis in the plane of the layer, wherein said tilt angle varies along an axis normal to said layer, and said azimuthal angle is substantially fixed along an axis normal to said layer and wherein the tilt angles of adjacent said layers vary in a positive sense and a negative sense respectively.
A compensator for a liquid crystal display, said compensator comprising a plurality of layers, wherein:
A compensator for a liquid crystal display, said compensator comprising a plurality of layers, each layer comprising a birefringent material having an optical symmetry axis defined by a tilt angle, measured relative to the plane of the layer, and an azimuthal angle, measured relative to a reference axis in the plane of the layer, wherein each of said tilt angle and said azimuthal angle varies along an axis normal to said layer, and wherein the optical symmetry axes of adjacent said layers vary azimuthally in a positive sense and a negative sense respectively.
A liquid crystal display for viewing at various angles with respect to a normal axis perpendicular to the display, comprising:
Dependencies are inferred from the claim text.