Light-duide plate and backlight module
A light-guide plate comprising a light-guide board having a first refractive index and at least one light-guide part buried inside the light-guide board is provided. The light-guide part has a second refractive index larger than the first refractive index. The light-guide board and the light-guide part buried therein have different refractive indices so that the total reflection may occur for improving the light transmission efficiency in the light-guide plate.
1. A light-guide plate, comprising:
a light-guide board, having a first refractive index; and
at least one light-guide part, buried inside the light-guide board, wherein the light-guide part has a second refractive index larger than the first refractive index, and the light-guide part is a network light-guide part.
2. The light-guide plate according to claim 1 , wherein the light-guide part is uniformly buried inside the light-guide board.
3. The light-guide plate according to claim 1 , wherein the first refractive index is in a range of 1.4˜1.5.
4. The light-guide plate according to claim 1 , wherein the second refractive index is in a range of 1.5˜1.6.
5. The light-guide plate according to claim 1 , wherein the light-guide part is selected from the group consisting of Zeonor, Arton, polycarbonate(PC), epoxy and a combination thereof.
6. The light-guide plate according to claim 1 , wherein the light-guide board is selected from the group consisting of epoxy, polymethylmethacrylate (PMMA) and a combination thereof.
7. A backlight module, comprising:
a light-guide plate, comprising a light-guide board and at least one light-guide part buried inside the light-guide board, wherein the light-guide board has a first refractive index while the light-guide part has a second refractive index larger than the first refractive index, and the light-guide part is a network light-guide part; and
a light source, arranged on a light-incident surface of the light-guide plate, and the light source is aligned to the light-guide part of the light-guide plate.
8. The backlight module according to claim 7 , wherein the light-guide plate has a light-transmission surface, a reflective surface opposite the light-transmission surface and four side surfaces.
9. The backlight module according to claim 8 , wherein the light source is arranged on the four side surfaces so that the four side surfaces are as the light-incident surface.
10. The backlight module according to claim 8 , wherein the light source is arranged on one of the side surfaces so that this side surface is the light-incident surface and the other three side surfaces are reflective surfaces.
11. The backlight module according to claim 7 , wherein the light source is constituted of light emitting diodes or point light sources.
12. The backlight module according to claim 7 , wherein the first refractive index is in a range of 1.4˜1.5.
13. The backlight module according to claim 7 , wherein the second refractive index is in a range of 1.5˜1.6.
14. The backlight module according to claim 7 , wherein the light-guide part is selected from the group consisting of Zeonor, Arton, polycarbonate (PC), epoxy and a combination thereof.
15. The backlight module according to claim 7 , wherein the light-guide board is selected from the group consisting of epoxy, polymethylmethacrylate (PMMA) and a combination thereof.
16. The backlight module according to claim 7 , further comprising:
a reflective film, disposed underneath the light-guide plate;
at least one optical film, disposed above the light-guide plate; and
a frame, disposed outside the light-guide plate and the light source for assembling the light-guide plate, the light source, the reflective film and the optical film together.