Patent ID: 7812899
Filing Date: 2010-10-12
Classification: G02B,G02F

Abstract:
1. 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; a collimator disposed at a first side of the substrate which collimates light incident on the substrate to within a predetermined angle; 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 light extraction microstructure, formed on an upper surface of the liquid crystal polymer layer, through which light is extracted from the liquid crystal polymer layer to outside of the liquid crystal polymer layer; and a liquid crystal alignment microstructure which orients liquid crystals in the liquid crystal polymer layer in one direction, wherein, when the first refractive index of the liquid crystal polymer is n wherein the light extraction microstructure has a plurality of trigonal micro prisms that are engraved at predetermined intervals on the upper surface of the liquid crystal polymer layer, wherein the liquid crystal alignment microstructure is engraved in a form of stripes that are arranged side by side at predetermined intervals between the trigonal micro prisms, and wherein the liquid crystal alignment microstructure and the light extraction microstructure are formed on the same upper surface of the liquid crystal polymer layer.