Patent ID: 8111459

Claim:
A laminated polarizing film comprising a negative substantially uniaxial optical film comprising a thermoplastic polymer having a negative molecular polarizability anisotropy, a positive optical film comprising a thermoplastic polymer having a positive molecular polarizability anisotropy, and a polarizing film, that are laminated at least in this order, a slow axis within a film plane of the negative substantially uniaxial optical film and a slow axis within a film plane of the positive optical film being substantially in parallel to each other, and each being substantially perpendicular to an absorption axis of the polarizing film, a positional relationship between a principal orientation direction of polymer main chains of the negative substantially uniaxial optical film and the absorption axis of the polarizing film being substantially in parallel, and a positional relationship between a principal orientation direction of polymer main chains of the positive optical film and the absorption axis of the polarizing film being substantially perpendicular, wherein an in-plane phase retardation value R NEA (λ) of the negative substantially uniaxial optical film, in-plane phase retardation value R PNZ (λ) of the positive optical film, and an orientation index in a thickness direction Nz(λ) of the positive optical film that is defined by the following three refractive indices satisfy the following expressions (1) to (3) at a measurement wavelength λ of 550 nm: Nz =( n x −n z )/( n x −n y ) n x : refractive index in a direction within a film plane where the refractive index is maximized n y : refractive index in a direction within a film plane perpendicular to the direction where the refractive index is maximized n z : refractive index in a normal direction with respect to the film plane 50 ≦R NEA (λ)≦170 (1) 15 ≦R PNZ (λ)≦90 (2) 1.05 ≦Nz (λ)≦1.7 (3).