Polarization film and display device

A polarization film, comprising:

• a hydrophobic polymer resin;
• and
• a dichroic dye represented by Chemical Formula 1,
• wherein, in Chemical Formula 1,
• Ar1 is a substituted or unsubstituted C6 to C15 arylene group,
• Ar2 is a C6 to C15 arylene group substituted with at least one of a substituted or unsubstituted C1 to C20 alkyl group, a substituted or unsubstituted C1 to C20 alkoxy group, a halogen atom and a halogen-containing group,
• Ar3 is a C6 to C15 arylene group substituted with an amide group,
• R1 is a substituted or unsubstituted C1 to C20 alkoxy group,
• R2 and R3 are each independently a substituted or unsubstituted C1 to C20 alkyl group, or R2 and R3 are linked to each other to form a ring, the substituted C1 to C20 alkyl group of R2 and R3 being a C1 to C20 alkyl group substituted with a halogen, a C1 to C20 alkoxy group, a C1 to C20 alkylthio group, a cyano group, an amino group, a C1 to C20 alkyl group, or a C1 to C20 aryl group, and
• n is 2,
• wherein the dichroic dye is dispersed in the hydrophobic polymer resin, and the hydrophobic polymer resin is elongated in a uniaxial direction by about 400 percent to about 1,000 percent;
• wherein the polarization film has a polarization efficiency of greater than or equal to about 90%, and
• wherein the polarization efficiency is obtained by Equation 2:
• PE (%)=[(T∥−T⊥)/(T∥+T⊥)]1/2×100 Equation 2
• wherein, in Equation 2,
• PE denotes polarization efficiency,
• T∥ is a transmittance of light entering parallel to a transmissive axis of the polarization film, and
• T⊥ is a transmittance of light entering perpendicular to the transmissive axis of the polarization film.