Polarizing plate and image display device comprising the same

A polarizing plate comprising:

• a polarizer;
• a first hard coating layer positioned on the polarizer, and containing a first binder resin comprising a (meth) acrylate-based (co) polymer;
• a light transmitting substrate positioned on the side of the first hard coating layer opposite to the polarizer, and having a retardation of at least 3000 nm and in-plane birefringence;
• and
• a second hard coating layer positioned on the side of the light transmitting substrate opposite to the first hard coating layer, and comprising a second binder resin and solid inorganic nanoparticles dispersed in the binder resin,
• wherein an acute angle formed by a slow axis of the light transmitting substrate and an absorption axis of the polarizer is 5 to 85°,
• wherein a thickness of the second hard coating layer is 45 μm or less,
• wherein a thickness ratio of the first hard coating layer and the second hard coating layer is 1:0.5 to 1:0.63, and
• wherein a rainbow change rate (ΔRb) of the polarizing plate calculated by Mathematical Formula 1 is 2.5% or less:
• ΔRb=(maximum reflectance at 450to 650 nm−minimum reflectance at 450to 650 nm)÷(mean reflectance at 450to 650 nm)×100, [Mathematical Formula 1]
• wherein a reflectance of the polarizing plate is measured under conditions of a 5º reflection mode, 2 nm slit width, and an analysis wavelength range of 380 to 780 nm, using a UV-Vis spectrometer, from which reflectance data at 450 to 650 nm are derived, and then a mean reflectance and difference between a maximum reflectance and a minimum reflectance at 450 to 650 nm are calculated and substituted in the Mathematical Formula 1.