Patent ID: 7607816

Claim:
A light guide plate, comprising: a light incident surface comprising a plurality of first micro-prism arrays and a plurality of second micro-prism arrays; a top light emission surface comprising a plurality of third micro-prism arrays and a plurality of fourth micro-prism arrays; and a bottom surface; wherein the light incident surface is positioned between the top light emission surface and the bottom surface, the first and second micro-prism arrays extend from the bottom surface to the top light emission surface, each first micro-prism array is perpendicular to and aligned with a corresponding third micro-prism array, each second micro-prism array is perpendicular to and aligned with a corresponding fourth micro-prism array, each first micro-prism array is comprised of a plurality of convex elements extending beyond the light incident surface, each second micro-prism array is comprised of a plurality of concave elements defined in the light incident surface, each third micro-prism array is comprised of a plurality of convex elements extending beyond the top light emission surface, and each fourth micro-prism array is comprised of a plurality of concave elements defined in the top light emission surface.