Liquid crystal display device with compensators

A liquid crystal display device comprising a first polarizer plate, a first optical compensation plate formed by a uniaxially stretched polymer film, a second optical compensation plate formed by a uniaxially stretched polymer film, a supertwisted nematic type liquid crystal display panel and a second polarizer plate which are stacked in the foregoing order with no additional optical elements interposed between the first polarizer plate and the liquid crystal display panel, wherein:

• the uniaxially stretched polymer films exhibit anisotropic optical properties defined by mutually orthogonal refractive indices denoted X and Y along slow and fast axes, respectively, parallel to the film plane and Z along an axis normal to the film plane;
• the slow axes of the first and second optical compensation plates are angularly displaced from each other by about 30.degree.;
• a coefficient K, denoting the rate of retardation change of light viewed through the film as the inclination of the viewing direction changes, is determined by
• (a) K=1-(Z-Y)/(X-Z) when (X+Y)/2>Z and X.noteq.Z
• (b) K=(X-Z)/(Z-Y)-1 when (X+Y)/2<Z and Z.noteq.Y
• (c) K=0 when (X+Y)/2=Z;
• and
• coefficients K1 and K2 of the uniaxially stretched polymer films forming the first and second optical compensation plates, respectively, are set in the range of
• -1.ltoreq.K1, K2.ltoreq.0.