Heatsink for cooling at least one LED

• US 8,123,378 B1
• Filed: 05/15/2009
• Issued: 02/28/2012
• Est. Priority Date: 05/15/2009
• Status: Active Grant

• Current Assignee: Signify Holding B.V. (Signify N.V.)
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Ruberg, Neil, Walker, Justin M.
• Primary Examiner(s): Han, Jason Moon
• Application Number:
  US12/467,062
• Time in Patent Office: 1,019 Days
• Field of Search: 362/249.02, 362/294, 362/311.02, 362/545, 362/800
• US Class Current: 362/249.02
• CPC Class Codes: F21S 8/088 with lighting device mounted on top of the standard, e.g. for pedestrian zones
• CPC Class Codes: F21V 29/83 the elements having apertures, ducts or channels, e.g. heat radiation holes
• CPC Class Codes: F21Y 2107/30 on the outer surface of cylindrical surfaces, e.g. rod-shaped supports having a circular or a polygonal cross section
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: Y10S 362/80 Light emitting diode

Abstract

A heatsink for cooling at least one LED may have a longitudinally extending channel flanked on each side by a longitudinally extending column of heat fins.

Claims

1. An LED panel for attachment and cooling of at least one LED, said LED panel comprising:

a substantially flat and planar front and rear surface, wherein said front surface of said LED panel has;

an elongated support surface on said front surface with a plurality of LEDs attached thereto;

a heatsink extending rearward and away from said support surface and on said rear surface, said heatsink having;

a longitudinally extending channel extending from a first latitudinal periphery of said heatsink to a second opposite latitudinal periphery of said heatsink;

a latitudinally extending dividing region located in between said first latitudinal periphery and said second latitudinal periphery;

wherein a plurality of arcuate heat fins flank said channel and are provided on each side of said dividing region, each of said heat fins having a first end proximal said channel and a second end more distal said channel and said dividing region than said first end;

wherein said substantially flat and planar LED panel is mounted to a frame, said frame retaining a plurality of said LED panels.

2. The LED panel of claim 1, wherein at least two of said plurality of heat fins on a first side of said dividing region are arcuate heat fins and an interior facing portion of said arcuate heat fins generally faces said dividing region.

3. The LED panel of claim 2, wherein at least one of said heat fins has a substantially mirror imaged corresponding single of said heat fins on an opposite side of said channel.

4. The LED panel of claim 3, wherein at least two of said heat fins on a second side of said dividing region opposite said first side are arcuate heat fins and an interior facing portion of said arcuate heat fins generally faces said dividing region.

5. The LED panel of claim 1, wherein each said support surface has at least one recessed pocket for receiving at least one LED printed circuit board.

6. The LED panel of claim 5, wherein said channel is centrally longitudinally aligned on said heatsink.

7. The LED panel of claim 6, wherein said dividing region is centrally latitudinally aligned on said heatsink.

8. A heatsink for cooling at least one LED, said heatsink comprising:

a front and rear substantially flat and planar surface, said front surface being a mounting surface for receiving a plurality of LEDs, said rear surface having

a longitudinally extending channel extending between latitudinal peripheries of said heatsink;

a first arcuate heat fin and a second arcuate heat fin provided on a first side of said channel;

a third arcuate heat fin and a fourth arcuate heat fin provided on a second side of said channel, said second side of said channel being opposite said first side;

wherein said first arcuate heat fin and said second arcuate heat fin are substantially mirror images of each other; and

wherein said third arcuate heat fin and said fourth arcuate heat fin are substantially mirror images of each other.

9. The heatsink of claim 8, wherein said first arcuate heat fin and said second arcuate heat fin form segments of a common circle.

10. The heatsink of claim 9, wherein said third arcuate heat fin and said fourth arcuate heat fin form segments of a common circle.

11. The heatsink of claim 10, wherein said first heat fin is directly opposite said channel of said third heat fin and wherein said second heat fin is directly opposite said channel of said fourth heat fin.

12. The heatsink of claim 11, wherein a pie shaped heat fin is interposed between said first arcuate heat fin and said second arcuate heat fin.

13. A heat sink for cooling LEDs and mounted in a fixture, comprising:

at least one LED panel having a substantially flat and planar front surface and a substantially flat and planar rear surface;

wherein said substantially flat and planar front surface of said LED panel has a support surface for receiving a plurality LEDs;

wherein said substantially flat and planar rear surface of said LED panel has a heatsink extending away from said front surface;

said heatsink having a longitudinally extending channel extending from a first latitudinal periphery of said heatsink to a second opposite latitudinal periphery of said heatsink;

a dividing region located in between said first latitudinal periphery and said second latitudinal periphery;

wherein a plurality of arcuate heat fins flank said channel and are provided on each side of said dividing region, each of said heat fins having a first end proximal said channel and a second end more distal from said channel and said dividing region than said first end;

said substantially flat and planar LED panel being mounted to a frame, said frame retaining a plurality of said LED panels.