Patent ID: 8687152

Claim:
An image display device, comprising: an image display cell; and a first polarizing plate placed on a viewer side of the image display cell, wherein the first polarizing plate comprises a polarizer and a first protective film, wherein the first protective film is placed on a viewer-side principal surface of the polarizer and satisfies following relations: 350 nmâ‰¦Re 1 â‰¦3000 nm;â€ƒâ€ƒ(i) Nz 1 â‰§7; andâ€ƒâ€ƒ(ii) Rth 1 >2500 nm,â€ƒâ€ƒ(iii) wherein Re 1 , Rth 1 and Nz 1 are defined by following equations: Re 1 =( nx 1 âˆ’ny 1 ) d 1 ; Rth 1 =( nx 1 âˆ’nz 1 ) d 1 ; and Nz 1 =Rth 1 /Re 1 , wherein d 1 represents a thickness of the first protective film, nx 1 represents a refractive index in a direction of an in-plane slow axis of the protective film, ny 1 represents a refractive index in a direction of an in-plane fast axis of the protective film, and nz 1 represents a refractive index in a direction of the thickness of the protective film.