Liquid crystal display having positive and negative birefringent compensator films
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United States of America Patent
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Feb 23, 1993
Grant Date -
N/A
app pub date -
Nov 3, 1989
filing date -
Nov 4, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A liquid crystal display comprising a liquid crystal cell and a polarizing sheet is disclosed, in which (A) at least one film having light transmission properties, said film (A) having at least one optic axis at an angle of not more than 45.degree. with the normal thereof or satisfying the relationship .eta..sub.TH -(.eta..sub.MD +.eta..sub.TD)/2>0 wherein .eta..sub.TH is a refractive index in the normal direction; .eta..sub.MD is a refractive index in the machine direction; and .eta..sub.TD is a refractive index in the transverse direction, and (B) at least one uniaxially stretched film of a polymer having a positive intrinsic birefringence and light transmission properties are inserted between the liquid crystal cell and the polarizing sheet. Viewing angle dependence of retardation of the display can be eliminated, and the display has markedly wide ended viewing angle.
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