Patent ID: 7317498

Claim:
A viewing angle magnification liquid crystal display comprising at least: a backlight system containing a polarization element (A) wherein said polarization element (A) comprises a retardation layer (b) and a reflection polarizer (a), wherein said reflection polarization (a) comprises at least two layers and said retardation layer (b) is disposed between said at least two layers, and said reflection polarizer (a) has respective selective reflection wavelength bands of polarized light superimposed on each other to conduct collimation for a diffusion light source; a liquid crystal cell transmitting collimated lights; polarizing plates disposed on both sides of the liquid crystal cell; and a viewing angle magnifying layer disposed on the viewer side of the liquid crystal cell to diffuse transmitted light, wherein the reflection polarizer (a) is a circular polarization type reflection polarizer (a 1 ) transmitting circularly polarized light but selectively reflecting reverse circularly polarized light, and the retardation layer (b) comprises a layer (b 1 ) having a front retardation of almost zero and a retardation of λ/8 or more relative to incident light incoming at a direction inclined from the normal direction by 30° or more.