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1. A composition for a photo-alignment layer, comprising a cyclic olefin-based photo-alignment polymer and a polyamic acid ester-based photo-alignment additive,
wherein the polyamic acid ester-based photo-alignment additive includes a repeating unit of Chemical Formula 5 or 6 below: in Chemical Formulas 5 and 6, m is 100-10,000; q and r are each independently an integer of 0-4; and R21 and R22 are each independently hydrogen, a halogen, a substituted or unsubstituted C1-C20 alkyl, a substituted or unsubstituted C2-C20 alkenyl, a substituted or unsubstituted C2-C20 alkynyl, a substituted or unsubstituted C3-C12 cycloalkyl, a substituted or unsubstituted C6-C40 aryl, a substituted or unsubstituted C7-C15 aralkyl, or a polar functional group including a non-hydrocarbonaceous polar group containing at least one element selected from the group consisting of oxygen, nitrogen, phosphorus, sulfur, silicon, and boron, in Chemical Formula 6, in the case where R21 and R22 are not hydrogen, a halogen, or a polar functional group, R21 radicals are connected to each other or R22 radicals are connected to each other to form a C4-C12 saturated or unsaturated ring or a C6-C24 aromatic ring, or R21 and R22 are connected to each other to form a C1-C10 alkylidene group; A is a chemical bond, oxygen, sulfur, phosphorus, or —NH—; R23 and R24 are each independently hydrogen, a halogen, a substituted or unsubstituted C1-C20 alkyl, a substituted or unsubstituted C2-C20 alkenyl, a substituted or unsubstituted C2-C20 alkynyl, a substituted or unsubstituted C3-C12 cycloalkyl, a substituted or unsubstituted C6-C40 aryl, a substituted or unsubstituted C7-C15 aralkyl, or a polar functional group including a non-hydrocarbonaceous polar group containing at least one element selected from the group consisting of oxygen, nitrogen, phosphorus, sulfur, silicon and boron; and Ra is a substituted or unsubstituted C1-C20 alkyl or a substituted or unsubstituted C6-C40 aryl. |
