Abstract: The present invention relates to a vertically aligned LCD (VA-LCD) comprising a positive compensation film including one or more of a first retardation film (+A-plate) satisfying the condition of nx>ny=nz and a second retardation film (?C-plate) satisfying the condition of nx=ny>nz, wherein the first retardation film is arranged such that its optical axis is perpendicular to an optical absorption axis of a neighboring polarizing plate, and a total thickness retardation (R?C+RVA) including the thickness retardation of the second retardation film and the thickness retardation of a VA-panel has a positive value in then range of 50-150 nm. The VA-LCD in accordance with the present invention improves contrast characteristics on a front surface and at a tilt angle and minimizes coloring in a black state according to the tilt angle.

Abstract: The present invention relates to a vertically aligned LCD (VA-LCD) comprising a negative compensation film including one or more of a first retardation film (+A-plate) satisfying the condition of nx>ny=nz and a first retardation film (?A-plate) satisfying the condition of nx<ny=nz, and one or more of a second retardation film (?C-plate) satisfying the condition of nx=ny>nz, wherein the first retardation film is arranged such that its optical axis is perpendicular to an optical absorption axis of a neighboring polarizing plate, and a total thickness retardation (R?C+RVA) including the thickness retardation of the second retardation film and the thickness retardation of a VA-panel has a negative value. The VA-LCD in accordance with the present invention improves contrast characteristics on a front surface and at a tilt angle and minimizes coloring in a black state according to the tilt angle.

Abstract: Disclosed is a complex light compensation C plate including at least two C plates representing different dispersion ratio values, respectively. The complex light compensation C plate improves a contrast characteristic of a liquid crystal display device at various viewing angles and has a broadband wavelength dispersion characteristic capable of minimizing color variation depending on various viewing angles in a black state of an LCD.

Abstract: The invention relates to a compensator comprising a positive and a negative birefringent retardation film, its use in displays and optical elements, and to displays comprising such a compensator.

Abstract: The present invention relates to an in-plane switching liquid crystal display comprising a negative biaxial retardation film and a positive C-plate, as viewing-angle compensation films. By the use of such viewing-angle compensation films, the contrast characteristics at the front side and inclination angle of the in-plane switching liquid crystal display can be improved and color shift with viewing angle in the dark state can be minimized.

Abstract: Disclosed is an in-plane switching liquid crystal display. The in-plane switching liquid crystal display improves the contrast characteristic at a front and at a predetermined inclination angle thereof by using a +A-plate and a +C-plate while minimizing a color shift according to viewing angles in the black state.

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 present invention relates to a vertically aligned LCD (VA-LCD) comprising a negative compensation film including one or more of a first retardation film (+A-plate) satisfying the condition of nx>ny=nz and a first retardation film (?A-plate) satisfying the condition of nx<ny=nz, and one or more of a second retardation film (?C-plate) satisfying the condition of nx=ny>nz, wherein the first retardation film is arranged such that its optical axis is perpendicular to an optical absorption axis of a neighboring polarizing plate, and a total thickness retardation (R?C+RVA) including the thickness retardation of the second retardation film and the thickness retardation of a VA-panel has a negative value. The VA-LCD in accordance with the present invention improves contrast characteristics on a front surface and at a tilt angle and minimizes coloring in a black state according to the tilt angle.

Abstract: The present invention relates to a vertically aligned LCD (VA-LCD) comprising a positive compensation film including one or more of a first retardation film (+A-plate) satisfying the condition of nx>ny=nz and a second retardation film (?C-plate) satisfying the condition of nx=ny>nz, wherein the first retardation film is arranged such that its optical axis is perpendicular to an optical absorption axis of a neighboring polarizing plate, and a total thickness retardation (R?C+RVA) including the thickness retardation of the second retardation film and the thickness retardation of a VA-panel has a positive value in then range of 50-150 nm. The VA-LCD in accordance with the present invention improves contrast characteristics on a front surface and at a tilt angle and minimizes coloring in a black state according to the tilt angle.

Abstract: The present invention relates to a vertically aligned LCD (VA-LCD) employing a bi-axial retardation compensation film, in which an in-plain refractive index (nx, ny) and a thickness refractive index (nx) of the film is nx>ny>nz. The film has a reversed wavelength dispersion in which retardation is increased in proportion to the increase of a wavelength in the range of visible rays and has a normal wavelength dispersion in which an absolute value of the thickness retardation is decreased in proportion to the increase of a wavelength in the range of visible rays. The VA-LCD cell having a retardation compensation characteristic is comprised by arranging a bi-axial retardation compensation film between the vertically aligned panel and a upper and lower polarizing plate. The VA-LCD of the present invention improves contrast characteristics on a front surface and at a tilt angle and minimizes coloring in a black state according to the tilt angle.

Abstract: The present invention provides a rubbing device including a base roller assembly that suspends and suspends and otherwise supports a base film to convey the same in one direction; a rubbing roller assembly that suspends and otherwise supports a rubbing cloth, and that moves the rubbing cloth in a direction opposite a conveying direction of the base film to thereby realize a rubbing treatment by contact between the rubbing cloth and the base film; and a rotating apparatus provided under the rubbing roller assembly and that rotates the entire rubbing roller assembly to a particular angle greater than 0° and up to and including 180° in the clockwise or counterclockwise direction with respect to the conveying direction of the base film.

Abstract: The present invention relates to a unified polarizing plate, which employs, as a protection layer of a polarizing film, a transparent film that can simultaneously function as a negative C-plate and transparent protection layer of a polarizing film and has negative refractive index toward thickness direction, thereby simultaneously performing functions as a negative C-plate for optical compensation and as a polarizing plate, and a method for preparing the same. The unified polarizing plate has superior durability at high temperature and high humidity compared to those employing TAC as a protection layer, and improves wide view angle of liquid crystal display having positive refractive index toward thickness direction, when the liquid crystal display device is ON or OFF.

Abstract: Provided are a vertically aligned liquid crystal display (VA-LCD) with good viewing angle characteristics, which has liquid crystals with negative dielectric anisotropy (??<0). In the VA-LCD, a polynorbornene based polymer film is used as a protection film and/or as a negative C-plate retardation film for an upper polarization plate and/or a lower polarization plate. Therefore, high contrast characteristics for a front view and an oblique angle view are realized and color change for an oblique angle view can be minimized.

Abstract: A television screen is provided with one or more substrates made of a thin film. A number of materials may be used for the film substrate. Further, structures are formed on one or more resin bearing surfaces of the film substrates using a number of techniques, including using patterned rollers to press against the resin bearing film surfaces. The resin can be liquid resin that is cured to set the patterned structures. The thin film results in stronger yet lightweight televisions screens that are safe and easy to handle.

Abstract: The present invention provides a negative C-plate type optical anisotropic film having negative birefringence along the thickness direction. In particular, the present invention provides n film comprising cycloolefin addition polymer, which is prepared by addition polymerizing norbornene-based monomers, a method for preparing the same, and a liquid crystal display comprising the same. The film of the present invention can be used for optical compensation films of a variety of LCD (liquid crystal display) modes because the refractive index alone the thickness direction can be controlled by the kind and amount of functional groups introduced to the cycloolefin addition polymer.

Abstract: The present invention provides a rubbing device including a base roller assembly that suspends and otherwise supports a base film to convey the same in one direction; a rubbing roller assembly that suspends and otherwise supports a rubbing cloth, and that moves the rubbing cloth in a direction opposite a conveying direction of the base film to thereby realize a rubbing treatment by contact between the rubbing cloth and the base film; and a rotating apparatus provided under the rubbing roller assembly and that rotates the entire rubbing roller assembly to a particular angle within the range of 0-180° in the clockwise or counterclockwise direction with respect to the conveying direction of the base film.

Abstract: A television screen is provided with one or more substrates made of a thin film. A number of materials may be used for the film substrate. Further, structures are formed on one or more resin bearing surfaces of the film substrates using a number of techniques, including using patterned rollers to press against the resin bearing film surfaces. The resin can be liquid resin that is cured to set the patterned structures. The thin film results in stronger yet lightweight televisions screens that are safe and easy to handle.

Abstract: The invention relates to a compensator comprising a positive and a negative birefringent retardation film, its use in displays and optical elements, and to displays 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: Methods of manufacturing lenses used in projection television display device screens. A method includes pressing at least one resin bearing surface of a film over a die mold pattern formed in an outer surface of one or more lens shaping rollers, and curing the resin bearing surfaces to form patterns on the surfaces of the film. The lens shaping rollers are made by forming a patterned planar surface into a cylinder that has a first set of patterns formed in an interior portion of the cylinder, inserting a die mold in the interior portion of the cylinder over the first set of patterns to form a second set of patterns, and separating the die mold from the cylinder to expose the second set of patterns in an outer portion of the die mold. The manufacturing methods produce strong and lightweight screens that are safe and easy to handle.