Liquid crystal display with optical negative uni-axial compensat

Details Liquid crystal display with optical negative uni-axial compensat Liquid crystal display with optical negative uni-axial compensat

1996-07-12

1998-08-18

Sikes, William L.

Liquid crystal cells, elements and systems

Particular structure

Having significant detail of cell structure only

349118, 349119, 349129, G02F 11335, G02F 11337

Patent

active

057964564

ABSTRACT:
A liquid crystal display has a plurality of pairs of top and bottom pixel electrodes, each of which has a plurality of sub-areas to which different voltages are applied, wherein at least any one of the top and bottom pixel electrodes has an optical compensation layer which has an optically negative uni-axial structure. The liquid crystal display may have a liquid crystal layer which has co-existing different domains differing in the twisted direction and the tilting up direction of the liquid crystal and at least an optical compensation layer having a bi-axial refractive anisotropy between the liquid crystal layer and the polarization plate, wherein the bi-axial refractive anisotropy of the optical compensation layer has three different refractive indexes n.sub.x, n.sub.y, n.sub.z which satisfy the relationship of n.sub.x >n.sub.y >n.sub.z where n.sub.x is the refractive index in a direction parallel to an X-axis parallel to a surface of the optical compensation layer, n.sub.y is the refractive index in a direction parallel to a Y-axis parallel to a surface of the optical compensation layer and perpendicular to the X-axis, and n.sub.z is the refractive index in a direction parallel to a Z-axis perpendicular to a surface of the optical compensation layer.

REFERENCES:
patent: 5568290 (1996-10-01), Nakamura
patent: 5576863 (1996-11-01), Aoki et al.
patent: 5594568 (1997-01-01), Abileah et al.
patent: 5602661 (1997-02-01), Schadt et al.
patent: 5619352 (1997-04-01), Koch et al.
patent: 5710611 (1998-01-01), Suzuki et al.

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