Patent ID: 9562991
Date: 2017-02-07
CPC Classifications: C08F,G02B

Claim:
1. An optical film consisting of a polymer consisting of a repeating unit represented by Chemical Formula 2: wherein in Chemical Formula 2, R wherein the aliphatic group, the alicyclic group, and the heterocyclic group are present singularly; or at least two of the alicyclic group, and the heterocyclic group are linked to provide a fused cyclic group; or at least two of the aliphatic group, the alicyclic group, and the heterocyclic group are linked via a single bond, or a functional group selected from —O—, —S—, —C(═O)—, —CH(OH)—, —S(═O) x and y are the same or different and are each an integer greater than 0; and wherein the optical film has a short wavelength dispersion of an in-plane phase-difference value (450 nm/550 nm) being less than or equal to about 1.0, and a long wavelength dispersion of an in-plane phase-difference value (650 nm/550 nm) being greater than or equal to about 1.0.