Patent ID: 7944530

Claim:
An optical film, which comprises: at least two optically anisotropic layers comprising a first optically anisotropic layer and a second optically anisotropic layer, wherein the first optically anisotropic layer is formed from a mixture which comprises two or more liquid crystal compounds having different structures from each other, wherein each of the two or more liquid crystal compounds has a polymerizable group, wherein each of the two or more liquid crystal compounds is a discotic liquid crystal compound, wherein at least one of the two or more liquid crystal compounds is a trisubstituted benzene skeleton discotic liquid crystal compound of the formula (D1): wherein Y 11 , Y 12 and Y 13 each independently represents a methine or nitrogen atom; L 1 , L 2 and L 3 each independently represents a single bond or a divalent connecting group; H 1 , H 2 and H 3 each independently represents one of formula (DI-A) or (DI-B): wherein in the formula (DI-A), YA 1 and YA 2 each independently represents a methine or nitrogen atom; wherein XA represents an oxygen atom, sulfur atom, methylene or imino; wherein the symbol * indicates the position at which the moiety is connected to L 1 to L 3 in the formula (DI); wherein the symbol ** indicates the position at which the moiety is connected to R 1 to R 3 in the formula (DI); wherein in the formula (DI-B), YB 1 and YB 2 each independently represents a methine or nitrogen atom; wherein XB represents an oxygen atom, sulfur atom, methylene or imino; wherein the symbol * indicates the position at which the moiety is connected to L 1 to L 3 in the formula (DI); wherein the symbol ** indicates the position at which the moiety is connected to R 1 to R 3 in the formula (DI); wherein R 1 , R 2 and R 3 each independently represents one represented by the following formula (DI-R): *-(-L 21 -Q 2 )n 1 -L 22 -L 23 -Q 1 Formula (DI-R) wherein in the formula (DI-R), * indicates the position at which the moiety is connected to H 1 to H 3 in the formula (DI); L 21 represents a single bond or divalent connecting group; Q 2 represents a divalent group having at least one cyclic structure; n 1 represents an integer of from 0 to 4; L 22 represents **—O—, **—O—CO—, **—CO—O—, **—O—CO—O—, **—S—, **—N(R)—, **—CH 2 —, **—CH═CH— or **—C≡C—, in which the symbol ** indicates the position at which the moiety is connected to Q 2 ; L 23 represents a divalent connecting group selected from the group consisting of —O—, —S—, —C(═O)—, —NH—, —CH 2 —, —CH═CH—, —C≡C— and a combination thereof, wherein a hydrogen atom in —NH—, —CH 2 — and —CH═CH— may be substituted; Q 1 represents a polymerizable group or hydrogen atom.