21.2: IPS‐LCD with High Contrast Ratio Over 80:1 at All Viewing Angles

A 32-inch IPS-LCD with a significantly wide viewing angle performance has been developed using a new optical compensation method. It provides a contrast ratio over 80: 1 at all viewing angles. According to our study, it is important to shorten the path for the optical compensation in the Poincare sphere. We have found an effective method using two retardation films, one with an Nz value larger than 0.5 and one with a value smaller than 0.5.