WIDE-VIEW MULTILAYER OPTICAL FILMS

摘要

A multilayer optical film includes a wave plate having a refractive index profile of nx >ny ≥nz and a fluoropolymer film comprising a moiety of (see formula) wherein R1, R2, and R3 are each independently hydrogen atoms, alkyl groups, substituted alkyl groups, or halogens, wherein at least one of R1, R2, and R3 is a fluorine atom, wherein R is each independently a substituent on the styrenic ring, n is an integer from 0 to 5 representing the number of the substituents on the styrenic ring, and wherein nx and ny represent in-plane refractive indices and nz the thickness-direction refractive index of the wave plates; wherein said multilayer optical film has a positive in-plane retardation (Re) and an out-of-plane retardation (Rth) that satisfies the equation of |Rth|< Re/2 throughout the wavelength range of 400nm to 800nm.