Patent ID: 8279369

Claim:
A polarized light emitting light guide plate comprising: a transparent substrate comprising an optically isotropic material, in which light incident through a lateral side of the polarized light emitting light guide plate travels; an anisotropic liquid crystal polymer layer, formed on an upper surface of the substrate and having a first refractive index with respect to a first polarization component of light and a second refractive index, different from the first refractive index, with respect to a second polarization component of light, perpendicular to the first polarization component; a polarization separation microstructure comprising a plurality of micro prisms, formed at an interface between the transparent substrate and the liquid crystal polymer layer, wherein an apex of each of the plurality of micro prisms points away from the transparent substrate, which refracts or reflects the first polarization component, and transmits the second polarization component; and a liquid crystal alignment microstructure disposed on the upper surface of the substrate at predetermined intervals only between the plurality of micro prisms, which aligns the liquid crystals in the liquid crystal polymer layer in one direction, wherein a refractive index of the polarization separation microstructure is substantially equal to a refractive index of the substrate, and the first refractive index of the liquid crystal polymer layer is greater than the refractive index of the substrate, and the second refractive index of the liquid crystal polymer layer is substantially equal to the refractive index of the substrate.