Abstract: A light guide plate (LGP) with auxiliary light guide structures is presented, wherein the top or bottom surface has a plurality of auxiliary light guide structures and light guide patterns, and wherein the dihedral angle between the tangent plane of the auxiliary light guide structure and the reference plane is less than 40 degrees. And the surfaces of the light guide pattern are rough surfaces. Together with the functions of the auxiliary light guide structures and the light guide patterns, the light is guided and emitted out of the LGP, and then the probability of the light emitted out of the LGP is increased after the light is scattered or reflected by the light guide patterns.

Abstract: A light-guide plate and its light-guide structures that are formed at the plate body of the light-guide plate in a concave configuration, a bottom side of the light-guide facet of the light-guide structures that face to the light source approximately presents an arc-like shape. The arc-like shape makes the light after deflecting have the effect of diffusion for a certain extent. These light-guide structures present a sparse-to-dense distribution along the direction that is away from the light source. The arc angles of the bottom side of the light-guide structures present a large-to-small configuration along the direction that is away from the light source such that the whole brightness of the light-guide plate is uniform.