Rectangular optical compensatory sheet, process for preparation

Details Rectangular optical compensatory sheet, process for preparation Rectangular optical compensatory sheet, process for preparation

1996-07-24

1997-09-16

Thomas, Alexander

Stock material or miscellaneous articles

Liquid crystal optical display having layer of specified...

With charge transferring layer of specified composition

427162, 427164, 349118, G02F 11335

Patent

active

056678541

ABSTRACT:
Disclosed is a rectangular optical compensatory sheet having a shorter side of not less than 14 cm which comprises a transparent support, an orientation layer provided thereon and an optically anisotropic layer provided on the orientation layer, the optically anisotropic layer comprising a compound having one or more discotic structure units in its molecule, and whose variation of retardation in overall area is within X.+-.5 nm wherein X is in the range of 0 to 100 nm, the retardation being represented by the formula: (nx-ny).times.d in which nx and ny are main refractive indices on the plane of the sheet and d is the thickness of the sheet in terms of nm. Further, a liquid crystal display and a color liquid crystal display provided with the optical compensatory sheet are disclosed.

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