Light source package structure

• US 7,878,689 B2
• Filed: 02/26/2010
• Issued: 02/01/2011
• 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
• Primary Examiner(s): Lee; Y My Quach
• Application Number:
  US12/714,255
• Publication Number:
  US 20100149821A1
• Time in Patent Office: 340 Days
• Field of Search: 362/244, 362/268, 362/311.02, 362/311.04, 362/311.06, 362/311.14, 362/311.15, 362/326, 362/327, 362/329, 362/331, 362/332, 362/335, 362/336, 362/337, 362/339, 362/340
• 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, 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;

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

a refraction package, disposed outside the second refraction surface while covering the same, wherein the refraction package further has a third refraction surface for receiving and refracting the first discharging light incident thereon to form a second refracting light and a fourth refraction surface for receiving and refracting the second refracting light and thus forming a second discharging light emitted out the of the refraction package.

2. The light source package structure of claim 1, wherein at least a round-tipped structure are formed at an upper portion of the first refraction surface.

3. The light source package structure of claim 1, wherein at least a taper structure are formed at an upper portion of the first refraction surface.

4. The light source package structure of claim 3, wherein the tapered structure is a structure selected from the group consisting of a pyramid and a corn.

5. 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.

6. The light source package structure of claim 2, wherein the profile of the round-tipped structure is defined by one of the following shapes:

arc, aspheric, lenticular and spherical.

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