Lighting apparatus with heat dissipation system

• US 8,696,171 B2
• Filed: 05/06/2013
• Issued: 04/15/2014
• Est. Priority Date: 09/23/2008
• Status: Active Grant

• Current Assignee: LSI Industries Incorporated
• Original Assignee: LSI Industries Incorporated
• Inventors: Vanden Eynden, James G., Sferra, James P., Akers, Larry A., Boyer, John D.
• Primary Examiner(s): Ward, John A
• Application Number:
  US13/887,448
• Publication Number:
  US 20130242564A1
• Time in Patent Office: 344 Days
• Field of Search: 362/218, 362/249.01, 362/249.02, 362/345, 362/547, 362/580, 362/373
• US Class Current: 362/294
• 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 29/76 with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
• CPC Class Codes: F21V 5/04 of lens shape
• CPC Class Codes: F21V 7/00 Reflectors for light sources characterised by cooling arrangements F21V29/505
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A lighting apparatus is shown and described. In one aspect, the lighting apparatus includes a light source, a plate, and frame. The light source can include one or more lighting elements that are in thermal communication with the light source. The plate can have a dissipative portion extending outward from a point of thermal communication between the plate and the light source. The frame can at least partially enclose the light source and may also be in thermal communication therewith.

Claims

1. A luminaire comprising:

a housing;

a frame defining a lens perimeter;

a light source within the frame, the frame defining an outer perimeter which is wider than the frame at the lens perimeter creating an inwardly sloped portion of the frame; and

a plate in thermal communication with the frame and having a dissipative portion protruding away from the housing and extending to be substantially parallel to the inwardly sloped portion of the frame, the dissipative portion defining a heat dissipation surface and its parallel protrusion angles the heat dissipation surface toward cooler areas.

2. The luminaire of claim 1 wherein the light source comprises one or more light emitting diodes.

3. The luminaire of claim 1 wherein the luminaire further comprising a lens extending across the lens perimeter enclosing the light source within the frame.

4. The luminaire of claim 1 wherein the luminaire further comprising a lens extending across the lens perimeter enclosing the light source, but not the dissipative portion, within the frame.

5. The luminaire of claim 1 wherein the frame and dissipative portion are constructed of sheet metal.

6. The luminaire of claim 1 wherein the dissipative portion is an extension of the plate.

7. The luminaire of claim 1 being configured to direct light generally in a first direction and the dissipative portion extending generally at least partially in the first direction.

8. The luminaire of claim 1, the frame outer perimeter circumscribing the light source.

9. A luminaire comprising:

a frame defining a lens perimeter;

a light source within the frame, the frame defining an outer perimeter which is wider than the frame at the lens perimeter creating an inwardly sloped portion of the frame; and

a plate in thermal communication with the frame and having a dissipative portion extending to be substantially parallel to the inwardly sloped portion of the frame.

10. The luminaire of claim 9 wherein the light source comprises one or more light emitting diodes.

11. The luminaire of claim 9 wherein the luminaire further comprising a lens extending across the lens perimeter enclosing the light source within the frame.

12. The luminaire of claim 9 wherein the luminaire further comprising a lens extending across the lens perimeter enclosing the light source, but not the dissipative portion, within the frame.

13. The luminaire of claim 9 wherein the dissipative portion is an extension of the plate.

14. The luminaire of claim 9 being configured to direct light generally in a first direction and the dissipative portion extending generally at least partially in the first direction.

15. The luminaire of claim 9, the frame outer perimeter circumscribing the light source.

16. A luminaire comprising:

a frame defining a lens perimeter;

a light source within the frame, the frame defining an outer perimeter which is wider than the frame at the lens perimeter creating an inwardly sloped portion of the frame; and

a plate in thermal communication with the frame and having a dissipative portion extending to be substantially parallel to the inwardly sloped portion of the frame, the dissipative portion having first and second opposing sides exposed to ambient air.

17. The luminaire of claim 16 wherein the light source comprises one or more light emitting diodes.

18. The luminaire of claim 16 wherein the luminaire further comprising a lens extending across the lens perimeter enclosing the light source within the frame.

19. The luminaire of claim 16 wherein the luminaire further comprising a lens extending across the lens perimeter enclosing the light source, but not the dissipative portion, within the frame.

20. The luminaire of claim 16 wherein the frame and dissipative portion are constructed of sheet metal.

21. The luminaire of claim 16 wherein the dissipative portion is an extension of the plate.

22. The luminaire of claim 16 being configured to direct light generally in a first direction and the dissipative portion extending generally at least partially in the first direction.

23. The luminaire of claim 16, the frame outer perimeter circumscribing the light source.