Light guide plate with multi-directional structures

Abstract

A light guide plate with multi-directional structures includes a main body, a plurality of first microstructures and a plurality of second microstructures. The main body includes a light-incident surface, a light-emitting surface and a reflecting surface. The light-incident surface connects the light-emitting surface and the reflecting surface. The first, microstructures are disposed on the light-emitting surface or the reflecting surface and arranged along a first extending direction The second microstructures are disposed on the light-emitting surface or the reflecting surface and arranged along a second extending direction. The second microstructures and the first microstructures are disposed on the same plane and intersect with each other. Each of the second microstructures is a single stripe pattern, and has a width which becomes gradually smaller from one end of the second microstructure near the light-incident surface to the other end of the second microstructure away from the light-incident surface.

What is claimed is: 
     
         1 . A light guide plate comprises:
 a main body, comprising:
 a light-incident surface; and 
 at least one main surface connected to the light-incident surface; 
   at least one first region; and   at least one second region, disposed adjusted to the at least one first region, wherein the at least one first region and at least one the second region are disposed on the same surface of the at least one main surface;   wherein a plurality of microstructures are disposed in at least one portion of the at least one first region and the at least one second region.   
     
     
         2 . The light guide plate of  claim 1 , wherein
 a width of the at least one first region becomes gradually greater from one end of the at least one first region near the light-incident surface to the other end of the at least one first region away from the light-incident surface; and   a width of the at least one second region becomes gradually smaller from one end of the at least one second region near the light-incident surface to the other end of the at least one second region away from the light-incident surface.   
     
     
         3 . The light guide plate of  claim 1 , wherein the microstructures located in the first region are cut by the microstructures located in the second region. 
     
     
         4 . The light guide plate of  claim 1 , wherein the microstructures comprise a plurality of first microstructures, and the first microstructures are disposed in the at least one first region, and the first microstructures are arranged along a first extending direction. 
     
     
         5 . The light guide plate of  claim 4 , wherein the first microstructures are continuously arranged side by side. 
     
     
         6 . The light guide plate of  claim 4 , wherein the microstructures comprise a plurality of second microstructures, and the second region is set with one single second microstructure, wherein the second microstructures are arranged along a second extending direction, and the second extending direction and the first extending direction intersect with each other. 
     
     
         7 . The light guide plate of  claim 6 , wherein the first extending direction is vertical to the second extending direction. 
     
     
         8 . The light guide plate of  claim 6 , wherein each of the first microstructures or each of the second microstructures is a convex portion or a concave portion. 
     
     
         9 . The light guide plate of  claim 8 , wherein when each of the second microstructures is the convex portion, a height of the convex portion becomes gradually smaller from one end of each of the second microstructures near the light-incident surface to the other end of each of the second microstructures away from the light-incident surface, wherein when each of the second microstructures is the concave portion, a depth of the concave portion becomes gradually smaller from one end of each of the second microstructures near the light-incident surface to the other end of each of the second microstructures away from the light-incident surface. 
     
     
         10 . The light guide plate of  claim 4 , wherein a cross-sectional profile of each of the first microstructures is in a V-shape or an inverted V-shape, and a first angle and a second angle are respectively included between two respective surfaces of each of the first microstructures and the at least one main surface. 
     
     
         11 . The light guide plate of  claim 6 , wherein a cross-sectional profile of each of the second microstructures is in a V-shape, an inverted V-shape, an arc-shape or a trapezoid-shape. 
     
     
         12 . The light guide plate of  claim 6 , wherein every two adjacent first microstructures are equidistantly arranged, and every two adjacent second microstructures are equidistantly arranged. 
     
     
         13 . The light guide plate of  claim 6 , wherein every two adjacent first microstructures are equidistantly arranged, and every two adjacent second microstructures are non-equidistantly arranged. 
     
     
         14 . The light guide plate of  claim 6 , wherein every two adjacent first microstructures are non-equidistantly arranged, and every two adjacent second microstructures are equidistantly arranged. 
     
     
         15 . The light guide plate of  claim 6 , wherein every two adjacent first microstructures are non-equidistantly arranged and every two adjacent second microstructures are non-equidistantly arranged. 
     
     
         16 . The light guide plate of  claim 4 , wherein at least one portion of the first microstructure has a hazy surface, a matte surface, a hair-lined surface or a rough surface. 
     
     
         17 . The light guide plate of  claim 6 , wherein at least one portion of the second microstructure has a hazy surface, a matte surface, a hair-lined surface or a rough surface. 
     
     
         18 . The light guide plate of  claim 1 , wherein a contour of the at least one first region or the at least one second region varies from one end near the light-incident surface to the other end away from the light-incident surface. 
     
     
         19 . The light guide plate of  claim 8 , wherein the at least one first region and the at least one second region are arranged along a first direction, and the contour of the at least one first region or the at least one second region varies from the end near the light-incident surface to the end away from the light-incident surface along a second direction which is different from the first direction. 
     
     
         20 . A backlight module, comprising:
 a light guide plate as claimed in  claim 1 ; and   a light source disposed adjacent to the light-incident surface of the light guide plate.