TN liquid crystal display panel with the difference between the

Details TN liquid crystal display panel with the difference between the TN liquid crystal display panel with the difference between the

1995-10-12

1998-08-18

Sikes, William L.

Liquid crystal cells, elements and systems

Particular structure

Having significant detail of cell structure only

349117, 349 96, 349121, G02F 11335

Patent

active

057964572

ABSTRACT:
A TN type liquid crystal cell is interposed between a pair of polarization plates. First and second retardation films each having slow axes orthogonal to each other are disposed between one of the polarization plates and the liquid crystal cell. The product .DELTA.n.sub.1 .times.d.sub.1 of the refractive index anisotropy .DELTA.n.sub.1 and the thickness d.sub.1 of the first retardation film on the side of one of the polarization plates is set to a value greater than the product .DELTA.n.sub.2 .times.d.sub.2 of the refractive index anisotropy .DELTA.n.sub.2 and the thickness d.sub.2 of the second retardation film. The viewing angle of the liquid crystal display panel in the left-right direction is expanded by this arrangement.

REFERENCES:
patent: 5184236 (1993-02-01), Miyashita et al.
patent: 5227903 (1993-07-01), Miyazawa et al.
patent: 5396355 (1995-03-01), Wada et al.
patent: 5440413 (1995-08-01), Kikuchi et al.

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