Light guide plate, backlight module, and display device
A light guide plate includes a main body, stripe structures, and light-adjusting structures. The main body includes a light-incident surface and an optical surface. The stripe structures are disposed on the optical surface. The light-adjusting structures are disposed between two adjacent stripe structures. Each of the light-adjusting structures includes a first light active surface and a second light active surface. The first light active surface faces towards the light-incident surface. The second light active surface faces towards an opposite light-incident surface. The first light active surface and the second light active surface are inclined towards different directions and formed a non-symmetrical shape. A first included angle is formed between the first light active surface and the optical surface. A second included angle is formed between the second light active surface and the optical surface. The first included angle and the second included angle are acute angles.
1. A light guide plate, comprising:
a main body comprising a light-incident surface and an optical surface connected to the light-incident surface;
a plurality of stripe structures disposed on the optical surface; and
a plurality of light-adjusting structures disposed between every two adjacent stripe structures, wherein each of the light-adjusting structures comprises a first light active surface and a second light active surface connected to the first light active surface;
wherein the first light active surface faces towards the light-incident surface, and the second light active surface faces towards a side of the main body which is opposite to the light-incident surface, wherein the first light active surface and the second light active surface are inclined towards different directions and formed a non-symmetrical shape, and a first included angle is formed between the first light active surface and the optical surface, and a second included angle is formed between the second light active surface and the optical surface, wherein each of the first included angle and the second included angle is an acute angle; wherein
the first light active surface and the second light active surface of each of the light-adjusting structures are connected to form a junction line, wherein the junction line is parallel to the light-incident surface;
each of the first light active surface and the second light active surface of each of the light-adjusting structures has an end edge and two side edges, wherein the end edge is parallel to the junction line, and the side edges are not parallel to the junction line;
each of the light-adjusting structures comprises a first flank portion and a second flank portion, and the first flank portion and the second flank portion of each of the light-adjusting structures are respectively located at two opposite sides of the junction line and overlap with their adjacent stripe structures, so that lengths of the end edges of respective first light active surface and second light active surface are smaller than a length of the junction line.
2. The light guide plate of claim 1 , wherein side edges of the first light active surface and the second light active surface of each of the light-adjusting structures are connected to surfaces of striped structures adjacent thereto.
3. The light guide plate of claim 1 , wherein an extending direction of each of the striped structures is vertical to an extending direction of the light-incident surface.
4. The light guide plate of claim 1 , wherein
the main body has an opposite light-incident surface which is opposite to the light-incident surface; and
one end of each of the striped structures is connected to the light-incident surface, and the other end of each of the striped structures is connected to the opposite light-incident surface.
5. The light guide plate of claim 1 , wherein the first angle is greater than the second angle.
6. The light guide plate of claim 1 , wherein the light-adjusting structures are continuously or non-continuously arranged along the striped structures.
7. The light guide plate of claim 1 , wherein
the light-adjusting structures are arranged along the striped structures; and
each of the light-adjusting structures has a size which becomes greater with increased distance from the light-incident surface.
8. The light guide plate of claim 1 , wherein
the light-adjusting structures are arranged along the striped structures; and
distances between every two adjacent light-adjusting structures decrease along a direction from the light-incident surface to an opposite light-incident surface which is away from the light-incident surface.
9. The light guide plate of claim 1 , wherein the striped structures are continuously arranged or non-continuously arranged.
10. The light guide plate of claim 1 , wherein
the first light active surface and the second light active surface of each of the light-adjusting structures are arranged along a direction which is vertical to the light-incident surface.
11. The light guide plate of claim 10 , wherein each of the stripe structures has side edges, and a distance between the side edges of two adjacent stripe structures is the same from one end of each of the stripe structures located near the light-incident surface to the other end of each of the stripe structures located away from the light-incident surface.
12. The light guide plate of claim 10 , wherein each of the stripe structures has side edges, and a distance between the side edges of two adjacent stripe structures is gradually increasing from one end of each of the stripe structures located near the light-incident surface to the other end of each of the stripe structures located away from the light-incident surface.
13. A backlight module, comprising:
a light guide plate as claimed in claim 1 ;
at least one film disposed in front of the light guide plate;
a reflecting film disposed behind the light guide plate; and
a light source disposed adjacent to the light-incident surface of the light guide plate.
14. A display device, comprising:
a light guide plate as claimed in claim 1 ;
at least one film disposed in front of the light guide plate;
a reflecting film disposed behind the light guide plate; and
a light source disposed adjacent to the light-incident surface of the light guide plate; and
a display panel disposed in front of the at least one film.
15. A light guide plate, comprising:
a main body comprising a light-incident surface and an optical surface connected to the light-incident surface;
a plurality of stripe structures disposed on the optical surface; and
a plurality of light-adjusting structures disposed between every two adjacent stripe structures, wherein each of the light-adjusting structures comprises a first light active surface and a second light active surface connected to the first light active surface;
wherein the first light active surface faces towards the light-incident surface, and the second light active surface faces towards a side of the main body which is opposite to the light-incident surface, wherein the first light active surface and the second light active surface are inclined towards different directions and formed a non-symmetrical shape, and a first included angle is formed between the first light active surface and the optical surface, and a second included angle is formed between the second light active surface and the optical surface, wherein each of the first included angle and the second included angle is an acute angle; wherein
the first light active surface and the second light active surface of each of the light-adjusting structures are arranged along a direction which is vertical to the light-incident surface;
the first light active surface and the second light active surface of each of the light-adjusting structures are connected to form a junction line, wherein the junction line is parallel to the light-incident surface; and
each of the first light active surface and the second light active surface of each of the light-adjusting structures has two side edges, wherein the side edges are not parallel to the junction line, and the side edges are connected to surfaces of the adjacent striped structures.
16. The light guide plate of claim 15 , wherein
the main body has an opposite light-incident surface which is opposite to the light-incident surface;
a distance between the junction line of each of the light-adjusting structures and the optical surface is consistent from the light-incident surface to the opposite light-incident surface.
17. A backlight module, comprising:
a light guide plate as claimed in claim 15 ;
at least one film disposed in front of the light guide plate;
a reflecting film disposed behind the light guide plate; and
a light source disposed adjacent to the light-incident surface of the light guide plate.
18. A display device, comprising:
a light guide plate as claimed in claim 15 ;
at least one film disposed in front of the light guide plate;
a reflecting film disposed behind the light guide plate; and
a light source disposed adjacent to the light-incident surface of the light guide plate; and
a display panel disposed in front of the at least one film.