Patent ID: 8226287
Filing Date: 2012-07-24
Classification: G02B

Abstract:
1. A light guide plate, capable of guiding a light beam emitted by at least one light emitting device, the light guide plate comprising: a light-transmissive substrate, having a first surface, a second surface opposite to the first surface, and an incident surface connecting the first surface and the second surface, wherein the light beam from the light emitting device is capable of entering the light-transmissive substrate through the incident surface and is capable of being emitted out of the light-transmissive substrate through the first surface; and a plurality of optical structures, disposed on the second surface, each of the optical structures having a first total internal reflection (TIR) surface, a second TIR surface, and a third TIR surface, wherein the second TIR surface connects the first TIR surface and the third TIR surface, a first normal vector of the first TIR surface passing through a geometric center of the first TIR surface forms an angle θ wherein a part of the light beam from the incident surface is capable of being totally internally reflected by any adjacent two of the first TIR surface, the second TIR surface, and the third TIR surface in sequence.