Patent ID: 8956035
Filing Date: 2015-02-17
Classification: F21S,F21V,F21Y,G02B

Abstract:
1. An asymmetrically arranged light guide plate with triangular micro prisms, characterized in that it comprises: a smooth surface, and a prism surface, wherein a plurality of parallel strip-like micro prism bodies are arranged on the said prism surface, the cross section of each micro prism body is triangular, the distance of the vertexes of all triangles from left to right or from right to left to the said smooth surface is gradually increased and the connection line of the vertexes thereof is a straight line, and said straight line forms an inclusion angle α less than 45 degrees with the said smooth surface, a belt-shape light source is arranged on the micro prism body where the vertex of the triangle is the outermost from said smooth surface, the sectional triangles of the micro prism bodies are far from the belt-shape light source and the side receiving the light emitted from the said belt shape light source is called critical acceptance edge, said critical acceptance edge forms a critical angle ranging from 40 degrees to 90 degrees with the normal line of the said smooth surface, and said critical angle is gradually increased from the micro prism body where the vertex of the triangle is nearest to the said smooth surface to the micro prism body where the vertex of the triangle is farthest to the said smooth surface.