Patent ID: 8508696

Claim:
A polarizing plates set comprising: a first linear polarizer having a first linear polarizing axis extending in a first lateral direction, the first lateral direction being part of a lateral plane also having a second lateral direction different from the first lateral direction; a first λ/4 phase difference plate disposed over the first polarizer and having a refractive index (nz) between about 1.35 and about 2.05 in a thickness direction thereof, the thickness direction being orthogonal to the lateral plane; a second linear polarizer having a second linear polarizing axis extending in the second lateral direction, the second polarizer being disposed above and spaced apart from the first linear polarizer and also from the first λ/4 phase difference plate; and a second λ/4 phase difference plate disposed under the second polarizer, above the first λ/4 phase difference plate, and having a refractive index (nz) in a thickness direction of the second λ/4 phase difference plate which is essentially the same as that of the first λ/4 phase difference plate, wherein the refractive index (nz) of the first and second λ/4 phase difference plates is between about 1.65 and about 1.75.