Patent ID: 7654722

Claim:
A light guide plate, comprising: a wedge-like body having a light incidence plane next to a light source, a terminal plane opposite to said light incidence plane, a light emission plane extended between said light incidence plane and said terminal plane, and a light reflection plane opposite to and slanting towards said light emission plane; and a plurality of reflection structures protruding outward from said light reflection plane wherein a gap is provided between every two adjacent reflection structures; each reflection structure has a slant surface extended from a previous gap and slanting away from said light emission plane, a second reflection surface extended from said slant surface and slanting further away from said light emission plane, and a first reflection surface extended from said second reflection surface and slanting towards said light emission plane to connect to a subsequent gap; and said first and second reflection surfaces form a prism element having a height relative to said light reflection plane; wherein said heights of said prism elements are larger as said prism elements are positioned farther away from said light source.