Normally white twisted nematic LCD with positive uniaxial and nebative biaxial retarders having n.sub.x >n.sub.y >n.sub.z

A normally white twisted nematic liquid crystal display comprising:

• a liquid crystal layer for twisting at least one normally incident visible wavelength of light from about 80.degree.-100.degree. as it passes therethrough when the liquid crystal layer is in substantially the off-state thereby defining a twisted nematic display;
• first and second negative biaxial retarders sandwiching said liquid crystal layer therebetween, wherein n.sub.x >n.sub.y >n.sub.z for each of said negative biaxial retarders, wherein n.sub.z is perpendicular to a plane defined by n.sub.x and n.sub.y ;
• wherein each of said negative biaxial retarders has a retardation value d.multidot.(n.sub.x -n.sub.z) of from about 70-130 nm;
• and
• wherein the display outputs contrast ratios to the viewer of at least about 30:1 at horizontal viewing angles along the 0.degree. vertical axis of about .+-.60.degree..