Backlight module and illumination device thereof
A backlight module and an illumination device thereof. The illumination device of the backlight module comprises a light source and a lens, disposed over the light source with a predetermined gap therebetween. The lens comprises a bottom surface as an incident surface, a pair of upper refracting surfaces, and a pair of lateral refracting surfaces. The upper refracting surfaces form an included angle substantially in a range of about 80° to about 120°.
1. An illumination device, comprising:
a light source; and
a lens, disposed over the light source with a predetermined gap therebetween, comprising a bottom surface as an incident surface, a pair of upper refracting surfaces, and a pair of lateral refracting surfaces,
wherein the pair of upper refracting surfaces form an included angle substantially in a range of about 80° to about 120°, the incident surface is a substantially horizontal surface, each of the lateral surfaces is a substantially flat surface, and the incident surface and the lateral refracting surfaces form two obtuse angles are substantially in a range of about 100° to about 115°.
2. The illumination device of claim 1 , wherein the upper refracting surfaces and the incident surface form two acute angles.
3. The illumination device of claim 2 , wherein the two acute angles are substantially in a range of about 30° to about 50°.
4. The illumination device of claim 1 , wherein the lateral cross section of the lens is substantially V-shaped.
5. The illumination device of claim 1 , wherein the refracting index of the lens is substantially in a range of about 1.49 to about 1.51.
6. The illumination device of claim 1 , wherein the predetermined gap is substantially less than about 10 mm.
7. The illumination device of claim 1 , wherein the predetermined gap is substantially in a range of about 0 mm to about 2 mm.
8. The illumination device of claim 1 , wherein the lens comprises polymer materials, quartz, or glass.
9. The illumination device of claim 8 , wherein the polymer materials comprise polymethylmethacrylate (PMMA), polystyrene (PS), or polycarbonate (PC).
10. The illumination device of claim 1 , wherein the light source comprises a Lamberatian-type LED or a cold cathode fluorescent lamp.
11. A backlight module, comprising:
a frame;
a reflective plate disposed in the frame; and
at least one light source disposed over the reflective plate; and
a lens, disposed over the light source with a predetermined gap therebetween, comprising a bottom surface as an incident surface, a pair of upper refracting surfaces, and a pair of lateral refracting surfaces,
wherein the pair of upper refracting surfaces form an included angle substantially in a range of about 80° to about 120°, the incident surface is a substantially horizontal surface, and the incident surface and the lateral refracting surfaces form two obtuse angles are substantially in a range of about 100° to about 115°.
12. The backlight module of claim 11 , wherein the light source is linearly arranged.
13. The backlight module of claim 11 , further comprising a supporting member, disposed between the reflective plate and the lens, for supporting the lens.
14. The backlight module of claim 11 , wherein the frame further comprises at least one positioning member disposed on a sidewall of the frame and fixing the lens in the frame.
15. The backlight module of claim 14 , wherein the positioning member is adapted to accommodate the lens.
16. The backlight module of claim 14 , wherein the positioning member comprises a screw.
17. The backlight module of claim 11 , wherein the upper refracting surfaces and the incident surface form two acute angles.
18. The backlight module of claim 11 , wherein the two acute angles are substantially in a range of about 30° to about 50°.
19. The backlight module of claim 11 , wherein the lateral cross section of the lens is substantially V-shaped.
20. The backlight module of claim 11 , wherein the refracting index of the lens is substantially in a range of about 1.49 to about 1.51.
21. The backlight module of claim 11 , wherein the predetermined gap is substantially less than about 10 mm.
22. The backlight module of claim 11 , wherein the predetermined gap is substantially in a range of about 0 mm to about 2 mm.
23. The backlight module of claim 11 , further comprising at least one optical film disposed over the lens.
24. The backlight module of claim 11 , wherein the lens comprises polymer materials, quartz, or glass.
25. The backlight module of claim 23 , wherein the polymer materials comprise polymethylmethacrylate (PMMA), polystyrene (PS), or polycarbonate (PC).
26. The backlight module of claim 11 , wherein the light source comprises a Lamberation-type LED or a cold cathode fluorescent lamp.
27. An illumination device, comprising:
a light source; and
a lens, disposed over the light source with a predetermined gap therebetween, comprising a bottom surface as an incident surface, a pair of upper refracting surfaces, and a pair of lateral refracting surfaces as a light exit surface,
wherein the pair of upper refracting surfaces form an included angle substantially in a range of about 80° to about 120°, each of the lateral surfaces is a substantially flat surface, and the incident surface and the lateral refracting surfaces form two obtuse angles are substantially in a range of about 100° to about 115°.
28. The illumination device of claim 27 , wherein the upper refracting surfaces and the incident surface form two acute angles.
29. The illumination device of claim 28 , wherein the two acute angles are substantially in a range of about 30° to about 50°.
30. The illumination device of claim 27 , wherein the lateral cross section of the lens is substantially V-shaped.
31. The illumination device of claim 27 , wherein the refracting index of the lens is substantially in a range of about 1.49 to about 1.51.
32. The illumination device of claim 27 , wherein the predetermined gap is substantially less than about 10 mm.
33. The illumination device of claim 27 , wherein the predetermined gap is substantially in a range of about 0 mm to about 2 mm.
34. The illumination device of claim 27 , wherein the lens comprises polymer materials, quartz, or glass.
35. The illumination device of claim 34 , wherein the polymer materials comprise polymethylmethacrylate (PMMA), polystyrene (PS), or polycarbonate (PC).
36. The illumination device of claim 27 , wherein the light source comprises a Lamberatian-type LED or a cold cathode fluorescent lamp.
37. A backlight module, comprising:
a frame;
a reflective plate disposed in the frame; and
at least one light source disposed over the reflective plate; and
a lens, disposed over the light source with a predetermined gap therebetween, comprising a bottom surface as an incident surface, a pair of upper refracting surfaces, and a pair of lateral refracting surfaces as a light exit surface,
wherein the pair of upper refracting surfaces form an included angle substantially in a range of about 80° to about 120° and the incident surface and the lateral refracting surfaces form two obtuse angles are substantially in a range of about 100° to about 115°.
38. The backlight module of claim 37 , wherein the light source is linearly arranged.
39. The backlight module of claim 37 , further comprising a supporting member, disposed between the reflective plate and the lens, for supporting the lens.
40. The backlight module of claim 37 , wherein the frame further comprises at least one positioning member disposed on a sidewall of the frame and fixing the lens in the frame.
41. The backlight module of claim 40 , wherein the positioning member is adapted to accommodate the lens.
42. The backlight module of claim 40 , wherein the positioning member comprises a screw.
43. The backlight module of claim 37 , wherein the upper refracting surfaces and the incident surface form two acute angles.
44. The backlight module of claim 37 , wherein the two acute angles are substantially in a range of about 30° to about 50°.
45. The backlight module of claim 37 , wherein the lateral cross section of the lens is substantially V-shaped.
46. The backlight module of claim 37 , wherein the refracting index of the lens is substantially in a range of about 1.49 to about 1.51.
47. The backlight module of claim 37 , wherein the predetermined gap is substantially less than about 10 mm.
48. The backlight module of claim 37 , wherein the predetermined gap is substantially in a range of about 0 mm to about 2 mm.
49. The backlight module of claim 37 , further comprising at least one optical film disposed over the lens.
50. The backlight module of claim 37 , wherein the lens comprises polymer materials, quartz, or glass.
51. The backlight module of claim 50 , wherein the polymer materials comprise polymethylmethacrylate (PMMA), polystyrene (PS), or polycarbonate (PC).
52. The backlight module of claim 37 , wherein the light source comprises a Lamberatian-type LED or a cold cathode fluorescent lamp.
53. The backlight module of claim 37 , wherein the incident surface is a substantially horizontal surface.