Patent ID: 7796212

Claim:
A liquid crystal display comprising: a light source unit; a polarized light guide plate comprising an incident surface onto which unpolarized light from the light source unit is incident, wherein the polarized light guide plate polarizes, collimates, and out-couples the incident light; a liquid crystal panel which modulates the light illuminated from the polarized light guide plate to form images; and a diffusion layer which diffuses the light modulated in the liquid crystal panel, wherein: the polarized light guide plate further comprises: a first layer which guides the incident light; a second layer formed of an optically isotropic material on the first layer, wherein out-coupling units comprising a first convex portion are repeatedly arranged on the second layer; and a third layer formed of an optically anisotropic material on the second layer, a refractive index of the optically anisotropic material is greater than a refractive index of the second layer with respect to a first polarized light, and almost the same as the refractive index of the second layer with respect to a second polarized light, the first polarized light is perpendicular to the second polarized light, and the polarized light guide plate out-couples the first polarized light; wherein the liquid crystal panel comprises a first substrate upon which a first polarization plate is attached, a second substrate upon which a second polarization plate is attached, and a liquid crystal layer encapsulated between the two substrates; and wherein the diffusion layer and one of the first polarization plate and the second polarization plate are formed as a single body at an outer side of the liquid crystal panel.