Patent ID: 8134664
Filing Date: 2012-03-13
Classification: G02F

Abstract:
1. A liquid crystal display device comprising: a first substrate having a first polarization layer on a light incident side of the liquid crystal display device; a second substrate having a second polarization layer on a light outgoing side of the liquid crystal display device; a liquid crystal layer disposed between said first substrate and said second substrate; a first birefringent medium disposed between said first polarization layer and said liquid crystal layer; a second birefringent medium disposed between said second polarization layer and said liquid crystal layer; and a pixel electrode and a common electrode arranged on one of said first substrate and said second substrate, wherein an absorbing axis of said first polarization layer and an absorbing axis of said second polarization layer form an angle of from 88 degrees to 92 degrees; wherein said liquid crystal layer has a property that, when no electric field is applied between said pixel electrode and said common electrode, said liquid crystal layer is optically isotropic in-plane of said liquid crystal layer and that, when an electric field is applied between said pixel electrode and said common electrode, an in-plane refractive index anisotropy is induced in said liquid crystal layer; wherein said liquid crystal layer, when no electric field is applied, has a larger refractive index in a direction parallel to said first and second substrates than a refractive index in a direction perpendicular to said first and second substrates; wherein said first birefringent medium has an Nz coefficient of not larger than −5; wherein said second birefringent medium has an Nz coefficient of not larger than 0; and wherein a retarded phase axis in a plane parallel to said first and second substrates forms an angle of from 88 degrees to 92 degrees with the absorbing axis of said polarization layer.