Adhesive film, optical member comprising the same and optical display comprising the same

An adhesive film having a tan δ ratio at 25° C. of about 1 to about 2 as calculated by Equation 1 and a tan δ ratio at −20° C. of about 0.1 to about 1.5 as calculated by Equation 2, the adhesive film being formed of an adhesive composition comprising a monomer mixture comprising a hydroxyl group-containing (meth)acrylic acid ester, wherein

• tan δ ratio at 25° C.=([tan δ]100/25° C.)/([tan δ]1/25° C.), Equation 1
• where [tan δ]1/25° C. is tan δ of the adhesive film at about 1 rad/sec and about 25° C., and [tan δ]100/25° C. is tan δ of the adhesive film at about 100 rad/sec and about 25° C., and
• tan δ ratio at −20° C.=([tan δ]100/−20° C.)/([tan δ]1/−° C.) Equation 2
• where [tan δ]1/−20° C. is tan δ of the adhesive film at about 1 rad/sec and about −20° C., and [tan δ]100/−20° C. is tan δ of the adhesive film at about 100 rad/sec and about −20° C.