Linear lighting apparatus with improved heat dissipation

• US 20060146531A1
• Filed: 12/30/2004
• Published: 07/06/2006
• Est. Priority Date: 12/30/2004
• Status: Abandoned Application

• Current Assignee: IO Lighting Co.
• Original Assignee: IO Lighting Co.
• Inventors: Watt, Graeme, Reo, Ann
• Application Number:
  US11/026,816
• Publication Number:
  US 20060146531A1
• Time in Patent Office: Days
• US Class Current: 362/244
• CPC Class Codes: F21L 14/026 having a linear light source
• CPC Class Codes: F21S 4/28 rigid, e.g. LED bars
• CPC Class Codes: F21V 15/01 Housings, e.g. material or assembling of housing parts F21V15/02 takes precedence housings forming signs or letters G09F13/04
• CPC Class Codes: F21V 15/013 the housing being an extrusion
• CPC Class Codes: F21V 17/101 permanently, e.g. welding, gluing or riveting
• CPC Class Codes: F21V 17/104 using feather joints, e.g. tongues and grooves, with or without friction
• CPC Class Codes: F21V 17/16 by deformation of parts; Snap action mounting
• CPC Class Codes: F21V 17/164 the parts being subjected to bending, e.g. snap joints
• CPC Class Codes: F21V 19/001 the light sources being semiconductors devices, e.g. LEDs
• CPC Class Codes: F21V 19/04 with provision for changing light source, e.g. turret auxiliary devices for cleaning, placing, or removing incandescent lamps H01K3/32, fluorescent lamps H01J9/006
• CPC Class Codes: F21V 29/504 of refractors
• CPC Class Codes: F21V 29/767 the planes containing the fins or blades having directions perpendicular to the light emitting axis
• CPC Class Codes: F21V 5/008 Combination of two or more successive refractors along an optical axis
• CPC Class Codes: F21W 2131/107 of the exterior of buildings
• CPC Class Codes: F21Y 2103/10 comprising a linear array of point-like light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: G09F 13/0436 Signs, boards or panels attached to ceilings
• CPC Class Codes: G09F 13/0495 Signs, boards or panels attached to the ground
• CPC Class Codes: G09F 13/22 electroluminescent electroluminescent light sources per se H05B33/00
• CPC Class Codes: G09F 19/12 using special optical effects
• CPC Class Codes: G09F 2013/222 : with LEDs
• CPC Class Codes: G09F 2019/223 : in pavement panels

Abstract

The present invention provides a linear lighting apparatus with improved heat dissipation and a method for improving the heat dissipation in a linear lighting apparatus. The apparatus includes a plurality of light emitting diodes, a plurality of primary optical assemblies and an apparatus housing. The primary optical assemblies are each in contact with one of the plurality of light emitting diodes. The primary optical assemblies and a second optical assembly are configured to refract the light so as to create a linear light source emanating from the apparatus. The apparatus housing is configured to dissipate thermal energy from the light emitting diodes.

Claims

1. A linear lighting apparatus with improved heat dissipation including:

a plurality of light emitting diodes capable of emitting light;

a plurality of primary optical assemblies each in contact with one of said plurality of light emitting diodes, said primary optical assemblies configured to refract said light towards a secondary optical assembly, said secondary optical assembly configured to refract said light so as to cause light to emanate from said apparatus; and

an apparatus housing holding said secondary optical assembly and configured to dissipate radiated energy from said light emitting diodes.

2. The apparatus of claim 1, wherein said plurality of primary optical assemblies and said secondary optical assembly each comprise an extruded acrylic material.

3. The apparatus of claim 1, wherein said primary optical assemblies are configured to collimate said light.

4. The apparatus of claim 1, further including a light emitting diode tray configured to transfer thermal energy from said light emitting diodes to said apparatus housing.

5. The apparatus of claim 4, wherein said light emitting diodes are mounted on said tray.

6. The apparatus of claim 5, wherein said tray is capable of being removed from said housing for repair and/or replacement of one or more of said light emitting diodes.

7. The apparatus of claim 1, wherein said light emitting diodes are point sources of said light and each of said plurality of primary optical assemblies and said secondary optical assembly are configured to refract said light so as to provide a light beam continuous along a longitudinal length of said apparatus.

8. The apparatus of claim 1, wherein said secondary optical assembly is held by a snap-fit connection between a pair of tabs of said secondary optical assembly and a pair of recesses in said housing.

9. A method for improving the heat dissipation in a linear lighting apparatus, said method including:

emitting light from a plurality of light emitting diodes;

contacting a plurality of primary optical assemblies with said light emitting diodes;

refracting said light in each of said primary optical assemblies towards a secondary optical assembly;

refracting said light in a secondary optical assembly so that said light is directed in at least one of a desired direction and a desired distribution as said light emanates from said apparatus; and

dissipating thermal energy generated by said light emitting diodes through a housing of said apparatus.

10. The method of claim 9, wherein said plurality of primary optical assemblies and said secondary optical assembly each comprise an extruded acrylic material.

11. The method of claim 9, wherein said refracting step includes said primary optical assemblies collimating said light.

12. The method of claim 9, wherein said dissipating step includes transferring said thermal energy from said light emitting diodes to a tray holding said light emitting diodes to said apparatus housing.

13. The method of claim 12, wherein said step of refracting said light in said secondary optical assembly includes refracting said light in an asymmetric distribution.

14. The method of claim 9, wherein said steps of refracting said light in each of said primary optical assemblies and refracting said light in said secondary optical assembly produces a linear light beam continuous along a length of said linear lighting apparatus.

15. The method of claim 9, further including holding said secondary optical assembly in a housing of said apparatus by a snap-fit connection between a pair of tabs of said secondary optical assembly and a pair of recesses in said housing.

16. A lighting apparatus with increased heat dissipation capabilities, said apparatus including:

a thermally conductive housing of said apparatus;

a thermally conductive tray mounted in said housing; and

a plurality of light sources attached to said tray, said light sources producing thermal energy that is transferred from said light sources to said tray and from said tray to said housing.

17. The lighting apparatus of claim 16, wherein at least one of said housing and said tray includes extruded aluminum.

18. The lighting apparatus of claim 16, wherein said plurality of light sources includes a plurality of light emitting diodes.

19. The lighting apparatus of claim 16, wherein said housing includes a plurality of ribs on an exterior of said apparatus.

20. The lighting apparatus of claim 16, further including a plurality of refractory optical assemblies refracting light emitted by said plurality of light sources in at least one of a desired direction and a desired distribution.