Dye-based polarizing films, and polarizing plates and display devices containing them.

Abstract

A polarizing film, characterized in that it is a polarizing film containing a substrate, the substrate containing an azo compound or a salt thereof (compound A) as shown in formula (1) below, and an azo compound or a salt thereof (compound B) as shown in formula (2) below; (in formula (1), X1 represents an amino group optionally having a substituent, or an amino group optionally having a substituent, a naphthylamino group optionally having a substituent, a benzoylamino group optionally having a substituent, or a naphthyltriazole group optionally having a substituent, Q1 and R1~R4 each independently represent any substituent, and m represents an integer from 1 to 3); (in formula (2), X2 represents an amino group optionally having a substituent, or an amino group optionally having a substituent, a naphthylamino group optionally having a substituent, a benzoylamino group optionally having a substituent, or a naphthyltriazole group optionally having a substituent, Q2, Q3 and R5~R8 each independently represent any substituent, A represents a sulfonyl or carboxyl group, and n represents an integer from 0 to 3).