Patent ID: 9715059
Date: 2017-07-25
CPC Classifications: G02B,G02F

Claim:
1. A light guide plate fixed to a back plate with a plurality of fixing portions, comprising: a light incident surface; a reflective surface connected with the light incident surface; and a light output surface opposite to the reflective surface and connected with the light incident surface, the light output surface comprising a main body and a plurality of locating portions mounted on the main body, the locating portions corresponding to the fixing portions, the locating portions mating with the corresponding fixing portions thereby fixing the light guide plate to the back plate, a blank area formed on the main body at each location where each of the locating portions mating with the corresponding fixing portion, and a plurality of microstructures formed on the rest area excluding the blank areas in the main body, wherein the fixing portions are engagement grooves, the locating portions are protrusions extending outwardly from opposite sides of the main body, the protrusions engage in the corresponding engagement grooves thereby fixing the light guide plate to the back plate, the engagement grooves, the protrusions, and blank areas are substantially rectangular, each of the blank area corresponds to an engagement groove and a protrusion, each of the blank areas directly faces the corresponding engagement groove, and is spaced apart from the corresponding protrusion, and the length of each of the blank areas is larger than the width of the corresponding engagement groove, and a plurality of microstructures are formed on the protrusions.