Patent ID: 8692464
Filing Date: 2014-04-08
Classification: G02B

Abstract:
1. A light guiding plate, comprising: a light transmissive substrate, comprising a first surface and a second surface opposite to the first surface; a plurality of optical structures, configured on the first surface; a plurality of first prisms, configured on the second surface, wherein the first prisms are substantially parallel, and each first prism comprises a first top portion and two first inclined surfaces respectively connected to two sides of the first top portion, the first top portion comprises a first vertex, an included angle of the two first inclined surfaces is θ when θ when 95°<θ when 105°<θ when 115°≦θ a plurality of second prisms, configured on the second surface, wherein the first prisms and the second prisms are substantially parallel, and the first prisms and the second prisms are alternately arranged.