Light score package structure

• US 7,699,504 B2
• Filed: 09/14/2006
• Issued: 04/20/2010
• Est. Priority Date: 12/20/2005
• Status: Active Grant

• Current Assignee: Industrial Technology Research Institute
• Original Assignee: Industrial Technology Research Institute
• Inventors: Huang, Heng-Chun, Sun, Yi-Ting, Hsu, Hsiu-Chen, Yao, Po-Hung
• Primary Examiner(s): LEE, Y MY QUACH
• Application Number:
  US11/520,765
• Publication Number:
  US 20070139932A1
• Time in Patent Office: 1,314 Days
• Field of Search: 362/244, 362/311, 362/326, 362/331, 362/332, 362/335, 362/336, 362/337, 362/339, 362/340, 362/800, 362/311.02, 362/311.04, 362/311.05, 362/311.06, 362/311.14, 362/311.15
• US Class Current: 362/332
• 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 disposed on the bottom thereof;

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

second refraction surfaces surrounding the first refraction surface, and each of the second refraction surfaces shaped like a second tapered structure arranged along a central axis of the light source package structure for receiving and refracting the first refracting light to form a first discharging light being emitted out of the light source package structure, said second refraction surfaces extending from the bottom of the accommodating space to a top portion of said first refraction surface.

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

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

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

6. The light source package structure of claim 5, 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.

7. 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.

8. The light source package structure of claim 7, wherein the pervious-to-light material is PMMA.

9. 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.

10. The light source package structure of claim 9, wherein the included angle is ranged between 0 degree and 180 degrees.

11. 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.

12. The light source package structure of claim 11, wherein the profile of the round-tipped structure is defined by one of the following shapes:

arc, aspheric, lenticular and spherical.

13. The light source package structure of claim 11, wherein the path of the round-tipped structure is a curve.

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

15. The light source package structure of claim 1, wherein said second refraction surfaces entirely cover the top portion and side portions of said first refraction surface.

16. The light source package structure of claim 1, wherein said second refraction surfaces receive and refract all of said first refracting light refracted by said first refraction surface.

17. A light source package structure, comprising:

an accommodating space, for accommodating a light source disposed on the bottom thereof;

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

second refraction surfaces surrounding the first refraction surface, and each of the second refraction surface shaped like a tapered structure arranged along a central axis of the light source package structure for receiving and refracting the first refracting light to form a first discharging light being emitted out of the light source package structure, said second refraction surfaces extending from the bottom of the accommodating space to a top portion of said first refraction surface.

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

arc, aspheric, lenticular and spherical.

19. The light source package structure of claim 17, wherein the path of the round-tipped structure is a curve.

20. The light source package structure of claim 17, wherein the first refraction surface is designed as a rugged surface.

21. The light source package structure of claim 17, wherein the second refraction surface is designed as a rugged surface.

22. The light source package structure of claim 17, wherein a refraction cap is formed on top of the second fraction surfaces while enabling the refraction cap to receive and refract a portion of the first refracting light failed to incident to the second fraction surface and thus form a second discharging light emitting therefrom.

23. The light source package structure of claim 22, 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.

24. The light source package structure of claim 17, wherein a layer of pervious-to-light material is coated on the exterior of the light source.

25. The light source package structure of claim 24, wherein the pervious-to-light material is PMMA.

26. The light source package structure of claim 17, 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.

27. The light source package structure of claim 26, wherein the included angle is ranged between 0 degree and 180 degrees.

28. The light source package structure of claim 17, wherein said second refraction surfaces entirely cover the top portion and side portions of said first refraction surface.

29. The light source package structure of claim 17, wherein said second refraction surfaces receive and refract all of said first refracting light refracted by said first refraction surface.