Optical film and display device including same

An optical film comprising:

• a polymer comprising a repeating unit A comprising a repeating unit represented by the following Chemical Formulas 1 to 3, or a combination thereof;
• and a repeating unit B derived from a monomer comprising an unsaturated bond copolymerizable with the repeating unit A,
• wherein the optical film has a short wavelength dispersion of an in-plane phase-difference value (Re) (450 nanometers/550 nanometers) ranging from about 0.81 to about 1.20, and a long wavelength dispersion of an in-plane phase-difference value (Re) (650 nanometers/550 nanometers) ranging from about 0.90 to about 1.18:
• wherein, in Chemical Formula 1,
• R1 to R6 are the same or different in each repeating unit and are each independently hydrogen, or a substituted or unsubstituted C1 to C10 aliphatic group, and
• R7 is the same or different in each repeating unit, and each is independently hydrogen, a substituted or unsubstituted C1 to C30 aliphatic group, a substituted or unsubstituted C3 to C30 alicyclic group, a substituted or unsubstituted C6 to C30 aromatic group, or a substituted or unsubstituted C2 to C30 heterocyclic group,
• wherein the alicyclic group, aromatic group, or heterocyclic group is present singularly;
• at least two of the alicyclic group, aromatic group, or heterocyclic group are linked to provide a condensed ring;
• or at least two of the alicyclic group, aromatic group, or heterocyclic group are linked via a single bond, —O—, —S—, —C(═O)—, —CH(OH)—, —S(═O)2—, —Si(CH3)2—, —(CH2)p— (wherein 1≦p≦10), —(CF2)q— (wherein 1≦q≦10), —C(CH3)2—, —C(CF3)2—, or —C(═O)NH—,
• wherein, in Chemical Formula 2,
• R8 to R13 are the same or different in each repeating unit and are each independently hydrogen, or a substituted or unsubstituted C1 to C10 aliphatic group,
• wherein, in Chemical Formula 3,
• R14 to R19 are the same or different in each repeating unit and are each independently hydrogen, or a substituted or unsubstituted C1 to C10 aliphatic group, and
• R20 and R21 are the same or different in each repeating unit and are each independently hydrogen, a substituted or unsubstituted C1 to C30 aliphatic group, a substituted or unsubstituted C3 to C30 alicyclic group, a substituted or unsubstituted C6 to C30 aromatic group, or a substituted or unsubstituted C2 to C30 heterocyclic group,
• wherein the alicyclic group, aromatic group, or heterocyclic group is present singularly;
• at least two of the alicyclic group, aromatic group, or heterocyclic group are linked to provide a condensed ring;
• or at least two of the alicyclic group, aromatic group, or heterocyclic group are linked via a single bond, —O—, —S—, —C(═O)—, —CH(OH)—, —S(═O)2—, —Si(CH3)2—, —(CH2)p— (wherein 1≦p≦10), —(CF2)q— (wherein 1≦q≦10), —C(CH3)2—, —C(CF3)2—, or —C(═O)NH—.