Light reflective structure and light panel

• US 8,721,115 B2
• Filed: 05/10/2011
• Issued: 05/13/2014
• Est. Priority Date: 05/28/2010
• Status: Expired due to Fees

• Current Assignee: Luxingtek, Ltd.
• Original Assignee: Luxingtek, Ltd.
• Inventors: Ing, Wen-Chiun, Hou, Wei-Hsin, Kao, Chi-Jen, Koh, Zhi-Wei
• Primary Examiner(s): CARIASO, ALAN B
• Application Number:
  US13/104,736
• Publication Number:
  US 20110292655A1
• Time in Patent Office: 1,099 Days
• Field of Search: 362/241, 362/245, 362/246, 362/247, 362/331, 362/332, 362/97.3, 362/327, 362/328, 362/330, 362/347, 362/350, 362/309, 362/433, 362/455
• US Class Current: 362/245
• CPC Class Codes: F21V 3/02 characterised by the shape
• CPC Class Codes: F21V 5/007 Array of lenses or refractors for a cluster of light sources, e.g. for arrangement of multiple light sources in one plane combination of two or more refractors F21V5/008
• CPC Class Codes: F21V 7/0083 Array of reflectors for a cluster of light sources, e.g. arrangement of multiple light sources in one plane combination of two or more reflectors F21V7/0025
• CPC Class Codes: F21Y 2105/16 square or rectangular, e.g. for light panels
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: G09F 13/14 Arrangements of reflectors therein

Abstract

A light panel is disclosed. The light panel comprises a circuit assembly, a plurality of light sources, a light reflective structure, and a diffuser layer. The light reflective structure has a plurality of concaves, which are continuously connected to form a plurality of ridges. Each of the concaves has an opening formed on the bottom surface thereof, and each of the light sources is disposed corresponding to each of the openings of the concaves. The diffuser layer is supported by the ridges of the light reflective structure. In some aspects of the present invention, the diffuser layer may have a sloping inner surface or is coated with patterned diffuser coatings on the top surface. Each light source can be added with a lens.

Claims

1. A light panel, comprising:

a circuit assembly;

a plurality of light sources, being disposed on and electrically connected to the circuit assembly;

a light reflective structure, having a plurality of concaves and a plurality of posts, wherein the concaves are continuously connected to form a plurality of ridges and the posts are formed on back sides of the ridges, each of the plurality of concaves has an opening formed on a bottom surface thereof, and each of the plurality of light sources is disposed corresponding to each of the openings of the plurality of the concaves;

a diffuser layer, being supported by the plurality of ridges of the light reflective structure and comprising a plurality of protrusions, which are centrally aligned with the plurality of light sources and within the concaves; and

a plurality of lenses disposed on the plurality of light sources, wherein each of the lenses has a recess at a top surface thereof.

2. The light panel of claim 1, wherein the plurality of light sources are LEDs.

3. The light panel of claim 1, wherein the plurality of concaves have a bowl shape, a polygonal shape, or a derivative thereof.

4. The light panel of claim 1, wherein the light reflective structure is made of a material of PET, PEN, PS, PMMA, PVC, PC, PP, PE, PU, ABS, MCPET (Micro Cellular PET), or a derivative thereof.

5. The light panel of claim 1, wherein the light reflective structure is coated with a metal layer, a white reflective layer, or a polymer resin, which contains titanium dioxide particles, calcium carbonate particles, silicon oxide particles, metallic particles, air microvoids, or a mixture of plurality types of particles.

6. The light panel of claim 1, wherein each of the plurality of protrusions is a cone shape.

7. The light panel of claim 1, wherein the diffuser layer is made of a material of a semi-transparent material, PC, PMMA, PS, PU, PET, ABS, PVC, or a derivative thereof.

8. The light panel of claim 1, wherein the diffuser layer comprises a plurality of patterned diffuser coatings, coated on one of a top surface and a bottom surface thereof, the diffuser layer having a plurality of high coverage areas and a plurality of low coverage areas, the high coverage areas being positioned close to the plurality of light sources, and the low coverage areas being positioned away from the plurality of light sources.

9. The light panel of claim 8, wherein the plurality of patterned diffuser coatings are made of a material of polymer resin containing lighting scattering particles such as titanium dioxide particles, calcium carbonate particles, silica oxide particles, metallic particles, air microvoids, and a derivative thereof.

10. A light panel, comprising:

a circuit assembly;

a plurality of light sources, being disposed on and electrically connected to the circuit assembly;

a light reflective structure, having a plurality of concaves and a plurality of posts, wherein the concaves are continuously connected to form a plurality of ridges and the posts are formed on back sides of the ridges, each of the plurality of concaves has an opening formed on a bottom surface thereof, and each of the plurality of light sources is disposed corresponding to each of the openings of the plurality of the concaves;

a diffuser layer, being supported by the plurality of ridges of the light reflective structure and comprising a plurality of patterned diffuser coatings, coated on a surface thereof, the diffuser layer having a plurality of high coverage areas and a plurality of low coverage areas, the high coverage areas being positioned close to the plurality of light sources, and the low coverage areas being positioned away from the plurality of light sources, wherein the diffuser layer further comprises a plurality of protrusions, which are centrally aligned with the plurality of light sources and within the concaves; and

a plurality of lenses disposed on the plurality of light sources, wherein each of the lenses has a recess at a top surface thereof.

11. The light panel of claim 10, wherein the plurality of light sources are LEDs.

12. The light panel of claim 10, wherein the plurality of concaves have a bowl shape, a polygonal shape, or a derivative thereof.

13. The light panel of claim 10, wherein the light reflective structure is made of a material of PET, PEN, PS, PMMA, PVC, PC, PP, PE, PU, ABS, MCPET (Micro Cellular PET), or a derivative thereof.

14. The light panel of claim 10, wherein the light reflective structure is coated with a metal layer, a white reflective layer, or a polymer resin, which contains titanium dioxide particles, calcium carbonate particles, silicon oxide particles, metallic particles, air microvoids, or a mixture of plurality types of particles.

15. The light panel of claim 10, wherein the diffuser layer has a plurality of protrusions, which are centrally aligned with the plurality of light sources.

16. The light panel of claim 15, wherein each of the plurality of protrusions is a cone shape.

17. The light panel of claim 10, wherein the diffuser layer is made of a material of a semi-transparent material, PC, PMMA, PS, PU, PET, ABS, PVC, or a derivative thereof.

18. The light panel of claim 10, wherein the plurality of patterned diffuser coatings are made of a material of polymer resin containing lighting scattering particles such as titanium dioxide particles, calcium carbonate particles, silica oxide particles, metallic particles, air microvoids, and a derivative thereof.