Optical sheet assembly with specific ranges of angles

Details Optical sheet assembly with specific ranges of angles Optical sheet assembly with specific ranges of angles

2007-11-06

2007-11-06

Schechter, Andrew (Department: 2871)

Liquid crystal cells, elements and systems

Particular structure

Having significant detail of cell structure only

C349S117000, C349S119000, C349S121000

Reexamination Certificate

active

11680698

ABSTRACT:
A liquid crystal display panel includes a liquid crystal layer having a twist angle of ±10 degree. An upper polarizer is disposed over an upper substrate of the liquid crystal display panel, and includes an absorption axis forming at an angle of 47±10 degree in a clockwise direction with respect to a major axis. An upper λ/2 retardation film is disposed between the upper substrate and the upper polarizer, and includes Δnd1of 260±10 nm and a slow axis forming at an angle of 166±10 degree in the clockwise direction with respect to the absorption axis. An upper λ/4 retardation film is disposed between the upper substrate and the upper λ/2 retardation film, and includes Δnd2of 140±10 nm and a slow axis forming at an angle of 111±10 degree in the clockwise direction with respect to the absorption axis. Therefore, the optical condition of the optical film assembly is optimized to improve an image display quality.

REFERENCES:
patent: 2002/0041351 (2002-04-01), Baek
patent: 2004/0169801 (2004-09-01), Kabe et al.

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