IPS mode liquid crystal display using two sheets of biaxial negative retardation film and a plate
AssigneeLG Chem, Ltd.
InventorsByoung Kun Jeon, Sergey Belyaev, Nikolay Malimonenko, Jun Won Chang, Soo Jin Jang, Sang Choll Han
Life of this patent
Estimating the term…
Abstract
Disclosed herein is an IPS-LCD using two sheets of negative (−) biaxial retardation films and one +C-plate. The IPS-LCD has a superior contrast ratio at the surface-facing angle and tilt angles and undergoes a minimal color change with viewing angles in a black state, thereby providing a wider viewing angle.
Claims17
An in-plane switching mode liquid crystal display, comprising a liquid crystal cell filled with liquid crystal molecules having positive dielectric anisotropy (Δε>0) which are horizontally aligned between two substrates, placed between a first polarizer and a second polarizer, respective absorption axes of which are perpendicular to each other, wherein a) a first negative (−) biaxial retardation film, arranged adjacent to the liquid crystal cell in such a manner so that its optical axis is perpendicular to an optical axis of the liquid crystal cell;
- b) a second negative (−) biaxial retardation film, arranged adjacent to the second polarizer in such a manner so that its optical axis is perpendicular to an absorption axis of the second polarizer;
- and c) a +C-plate arranged between the first negative (−) biaxial retardation film and the second negative (−) biaxial retardation film, are provided between the liquid crystal cell and the second polarizer.
Dependencies are inferred from the claim text.