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US 2010/0165265 A1Published application
Liquid crystal display device having wide viewing angle
AssigneeLG Display Co., Ltd.
InventorsJong-Won Moon, Kwang-Hoon Shin
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Abstract
Disclosed is a liquid crystal display device having a wide viewing angle, in which compensation films are disposed between a liquid crystal display panel and polarizers to change a polarized state of light, which is incident on the liquid crystal display panel and output therefrom through the polarizers, thereby preventing light from being leaked in a diagonal direction of the liquid crystal display device in a normally black mode.
Claims18
A liquid crystal display (LCD) device comprising:
- a liquid crystal display panel having a liquid crystal layer;
- a first polarizer and a second polarizer respectively disposed at upper and lower portions of the liquid crystal display panel to polarize light;
- a positive C-film disposed between the first polarizer and the liquid crystal display panel to change a polarized state of light, the positive C-film having a retardation value of Re=0 nm in a horizontal direction and a retardation value of Rth=−50˜−200 nm in a thickness direction;
- and
- a positive biaxial film disposed between the liquid crystal display panel and the second polarizer to change a polarized state of light, the positive biaxial film having a retardation value of Re=80˜160 nm in a horizontal direction and a retardation value of Rth=−24˜−160 nm in a thickness direction,
- wherein Re=(nx−ny)d and Rth=(nx−nz)d, where nx, ny and nz respectively denote a refractive index in x-axial direction, a refractive index in y-axial direction and a refractive index in z-axial direction.
3 more elements
Dependencies are inferred from the claim text.