Light source package structure

• US 20070139932A1
• Filed: 09/14/2006
• Published: 06/21/2007
• Est. Priority Date: 12/20/2005
• Status: Active Grant

• Current Assignee: Industrial Technology Research Institute
• Original Assignee: Industrial Technology Research Institute
• Inventors: Sun, Yi-Ting, Hsu, Hsiu-Chen, Yao, Po-Hung, Huang, Heng-Chun
• Granted Patent: US 7,699,504 B2
• Time in Patent Office: Days
• US Class Current: 362/331
• CPC Class Codes: F21L 4/027 the light sources being a LED
• CPC Class Codes: F21V 5/008 Combination of two or more successive refractors along an optical axis
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: G02B 19/0028 refractive and reflective surfaces, e.g. non-imaging catadioptric systems
• CPC Class Codes: G02B 19/0061 the light source comprising a LED semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission H01L33/00
• CPC Class Codes: G02B 19/0071 adapted to illuminate a complete hemisphere or a plane extending 360 degrees around the source
• CPC Class Codes: H01L 33/58 Optical field-shaping elements

Abstract

The present invention relates to a light source package structure, which comprises: an accommodating space for accommodating a light source, a first refraction surface, and at least a second refraction surface. The first refraction surface receives light discharging from the light source while refracting the same to form a first refracting light, the upper part of the first refraction surface further comprising a refracting structure for refracting the light emitted from the light source. The second refraction surface receives and refracts the first refracting light to form a discharging light being emitted out of the light source package structure. Wherein, an included angle is formed between the normal vector of a portion of the second refraction surface and the central axis of the light source package structure. It is noted that the aforesaid package structure can be used in various packaging for improving refraction. In a preferred embodiment, a light source of light emitting diode (LED) is packaged by the light source package structure of the invention for enabling the light emitted from the LED to be discharged out of the package structure by a large angle after being refracted multiple times, so that the LED package structure can be adopted as a flat light source for diverse purpose applied in industry.

Claims

1. A light source package structure, comprising:

an accommodating space, for accommodating a light source;

a first refraction surface, having at least a tapered structure formed at the upper portion of the same, for receiving light discharging from the light source while refracting the same to form a first refracting light; and

at least a second refraction surface, for receiving and refracting the first refracting light to form a first discharging light being emitted out of the light source package structure.

2. The light source package structure of claim 1, wherein the tapered structure is a structure selected from the group consisting of a pyramid and a corn.

3. The light source package structure of claim 1, wherein the first refraction surface is substantially the exterior of a first lens containing the accommodating space therein for enabling the exterior of the light source to be tightly attached to the interior of the accommodating space while sealing the same.

4. The light source package structure of claim 1, wherein the second refraction surface is shaped like a tapered structure

5. The light source package structure of claim 1, wherein the second refraction surface is shaped like a structure selected from the group consisting of round-tipped structure, wherein the profile of the round-tipped structure is defined by one of the following shapes:

arc, aspheric, lenticular and spherical.

6. The light source package structure of claim 1, wherein the first refraction surface is designed as a rugged surface.

7. The light source package structure of claim 1, wherein the second refraction surface is designed as a rugged surface.

8. The light source package structure of claim 1, wherein a flat light source can be configured by arranging an array of the light source package structures in a matrix while the matrix is covered by a diffuser

9. The light source package structure of claim 1, wherein a refraction cap is formed on top of the second refraction surface while enabling the refraction cap to receive and refract the portion of the first refracting light failed to incident to the second refraction surface and thus form a second discharging light emitting therefrom.

10. The light source package structure of claim 9, wherein the refraction cap further comprises:

a third refraction surface, for receiving and refracting the portion of the first refracting light failed to incident to the second fraction surface and thus forming a second refracting light;

a fourth refraction surface, connected to the third refraction surface, for receiving and refracting the second refracting light so as to form a third refracting light; and

a fifth refraction surface, connected to the fourth and the second refraction surfaces, for receiving and refracting the third refracting light so as to form the second discharging light.

11. The light source package structure of claim 1, further comprising:

a refraction package, disposed outside the second refraction surface while covering the same, for receiving and reflecting the first and the second discharging light incident thereon and thus forming a third discharging light.

12. The light source package structure of claim 1, wherein a layer of pervious-to-light material is coated on the exterior of the light source.

13. The light source package structure of claim 12, wherein the pervious-to-light material is PMMA.

14. The light source package structure of claim 1, wherein an included angle is formed between the normal vector of a portion of the second refraction surface and the central axis of the light source package structure.

15. The light source package structure of claim 14, wherein the included angle is ranged between 0 degree and 180 degrees.

16. The light source package structure of claim 1, wherein at least a round-tipped structure is formed at the upper portion of the first refraction surface while connecting to the at least one tapered structure.

17. The light source package structure of claim 16, wherein the profile of the round-tipped structure is defined by one of the following shapes:

arc, aspheric, lenticular and spherical.

18. The light source package structure of claim 16, wherein the path of the round-tipped structure is a curve

19. The light source package structure of claim 1, wherein the path of the tapered structure is a curve

20. A light source package structure, comprising:

an accommodating space, for accommodating a light source;

a first refraction surface, having at least a round-tipped structure formed at the upper portion of the same, for receiving light discharging from the light source while refracting the same to form a first refracting light; and

at least a second refraction surface, for receiving and refracting the first refracting light to form a first discharging light being emitted out of the light source package structure.

21. The light source package structure of claim 20, wherein the first refraction surface is substantially the exterior of a first lens containing the accommodating space therein for enabling the exterior of the light source to be tightly attached to the interior of the accommodating space while sealing the same.

22. The light source package structure of claim 20, wherein the profile of the round-tipped structure is defined by one of the following shapes:

arc, aspheric, lenticular and spherical.

23. The light source package structure of claim 20, wherein the path of the round-tipped structure is a curve

24. The light source package structure of claim 20, wherein the second refraction surface is shaped like a tapered structure

25. The light source package structure of claim 20, wherein the second refraction surface is shaped like a structure selected from the group consisting of round-tipped structure, wherein the profile of the round-tipped structure is defined by one of the following shapes:

arc, aspheric, lenticular and spherical.

26. The light source package structure of claim 20, wherein the first refraction surface is designed as a rugged surface.

27. The light source package structure of claim 20, wherein the second refraction surface is designed as a rugged surface.

28. The light source package structure of claim 20, wherein a flat light source can be configured by arranging an array of the light source package structures in a matrix while the matrix is covered by a diffuser.

29. The light source package structure of claim 20, wherein a refraction cap is formed on top of the second fraction surface while enabling the refraction cap to receive and refract the portion of the first refracting light failed to incident to the second fraction surface and thus form a second discharging light emitting therefrom.

30. The light source package structure of claim 29, wherein the refraction cap further comprises:

a third refraction surface, for receiving and refracting the portion of the first refracting light failed to incident to the second fraction surface and thus forming a second refracting light;

a fourth refraction surface, connected to the third refraction surface, for receiving and refracting the second refracting light so as to form a third refracting light; and

a fifth refraction surface, connected to the fourth and the second refraction surfaces, for receiving and refracting the third refracting light so as to form a third refracting light so as to form the second discharging light.

31. The light source package structure of claim 20, further comprising:

a refraction package, disposed outside the second refraction surface while covering the same, for receiving and reflecting the first and the second discharging light incident thereon and thus forming a third discharging light.

32. The light source package structure of claim 20, wherein a layer of pervious-to-light material is coated on the exterior of the light source.

33. The light source package structure of claim 31, wherein the pervious-to-light material is PMMA.

34. The light source package structure of claim 20, wherein an included angle is formed between the normal vector of a portion of the second refraction surface and the central axis of the light source package structure.

35. The light source package structure of claim 34, wherein the included angle is ranged between 0 degree and 180 degrees.

42. The light source package structure of claim 34, wherein a flat light source can be configured by arranging an array of the light source package structures in a matrix while the matrix is covered and sealed by a diffuser.

36. A light source package structure, comprising:

an accommodating space, for accommodating a light source;

a first refraction surface, for receiving light discharging from the light source while refracting the same to form a first refracting light;

at least a second refraction surface, for receiving and refracting the first refracting light to form a first discharging light being emitted out of the light source package structure; and

a reflection surface, connected to the at least one second refraction surface, for reflecting the portion of the first refracting light emitted from the top of the first refraction surface while enabling the reflected first refracting light to incident to the second refraction surface.

37. The light source package structure of claim 36, wherein at least a round-tipped structure are formed at the upper portion of the first refraction surface.

38. The light source package structure of claim 36, wherein at least a taper structure are formed at the upper portion of the first refraction surface.

39. The light source package structure of claim 38, wherein the tapered structure is a structure selected from the group consisting of a pyramid and a corn.

40. The light source package structure of claim 36 wherein the first refraction surface is substantially the exterior of a first lens containing the accommodating space therein for enabling the exterior of the light source to be tightly attached to the interior of the accommodating space while sealing the same.

41. The light source package structure of claim 37, wherein the profile of the round-tipped structure is defined by one of the following shapes:

arc, aspheric, lenticular and spherical.

43. The light source package structure of claim 36, further comprising:

a refraction package, disposed outside the second refraction surface while covering the same, for receiving and reflecting the first and the second discharging light incident thereon and thus forming a third discharging light.

44. The light source package structure of claim 36, wherein a layer of pervious-to-light material is coated on the exterior of the light source.