Customizable heat sink formed of sheet material for a lamp

• US 8,534,875 B1
• Filed: 05/03/2012
• Issued: 09/17/2013
• Est. Priority Date: 05/03/2012
• Status: Active Grant

• Current Assignee: LEDVANCE LLC (MLS Co. Ltd.)
• Original Assignee: OSRAM Sylvania Inc. (Ams-Osram AG)
• Inventors: Zhang, Shiyong, Zeng, Yichong
• Primary Examiner(s): Bowman, Mary Ellen
• Application Number:
  US13/463,411
• Time in Patent Office: 502 Days
• Field of Search: 362/294, 313/46, 257/98
• US Class Current: 362/294
• CPC Class Codes: F21K 9/23 Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
• CPC Class Codes: F21V 29/70 characterised by passive heat-dissipating elements, e.g. heat-sinks
• CPC Class Codes: F21V 29/75 with fins or blades having different shapes, thicknesses or spacing
• CPC Class Codes: F21V 29/83 the elements having apertures, ducts or channels, e.g. heat radiation holes
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00

Abstract

A solid state lighting device (100) including a heat sink (108) stamped from a single sheet (200). The heat sink (108) features a base portion (111) including a central light module receiving region (114) configured to receive a light module (102), a first set of arms (116) extending generally radially outwardly from a perimeter (P) of the base (111), a first set of transverse members (118) intersecting with the first set of arms (116), a first set of air flow apertures (120) defined by the base portion (111), the arms (116), and the transverse members (118), and a first set of radiating plates (122) having adjacent radiating plates separated by gaps. Each one of the radiating plates (122) is bent outwardly and extends transversely from a front face of a first arm (116) or first transverse member (118).

Claims

1. A solid state lighting device (100) comprising:

a heat sink (108) stamped from a single sheet (200) of thermally conductive material, said heat sink (108) comprising;

a base portion (111) including a central light module receiving region (114) configured to receive a light module (102);

a first set of first arms (116) extending generally radially outwardly from said base (111);

a first set of first transverse members (118) intersecting with said first set of arms (116);

a first set of first air flow apertures (120) defined by said base portion (111), said first set of arms (116), and said first set of transverse members (118); and

a first set of first radiating plates (122) having adjacent pairs of radiating plates separated by gaps thereby permitting airflow between said adjacent pairs, wherein each one of said first set of radiating plates (122) is bent outwardly and extends transversely from a front face of a respective first arm (116) or first transverse member (118).

2. The solid state lighting device (100) of claim 1, wherein each transverse member (118) intersects with a different pair of adjacent radial arms (116) a radial distance from said light module receiving region (114).

3. The solid state lighting device (100) of claim 1, wherein at least one of said first set of radiating plates (122) includes a first edge (134) and at least one unsupported edge (136), wherein said first edge (134) is coupled to front faces of at least one of said first set of arms (116) or first set of transverse members (118).

4. The solid state lighting device (100) of claim 1, wherein at least one of said first set of radiating plates (122) comprises a shape substantially corresponding to a shape of one of said first set of air flow apertures (120).

5. The solid state lighting device (100) of claim 1, wherein said first set of transverse members (118) defines a first ring.

6. The solid state lighting device (100) of claim 5, wherein said first set of radiating plates (122) extends outwardly from said first set of transverse members (118) generally concentric with said first ring.

7. The solid state lighting device (100) of claim 1, wherein said heat sink 108 further comprises:

a second set of second arms (124) extending generally radially outwardly from at least one of said first set of arms (116) and said first set of transverse members (118);

a second set of second transverse members (126) intersecting with said second set of arms (124) a radial distance from said first set of transverse members (118); and

a second set of second radiating plates (128) bent outwardly and extending transversely from front faces of at least one of said second set of arms (124) or said second set of transverse members (126), wherein adjacent pairs of said second set of radiating plates (128) are separated by air gaps thereby permitting airflow between said adjacent pairs of said second set of radiating plates (128).

8. The solid state lighting device (100) of claim 7, wherein said first set and said second set of transverse members (126) define a first and a second concentric ring, respectively.

9. The solid state lighting device (100) of claim 8, wherein said first set and said second set of radiating plates (122, 128) are generally aligned in said first and said second concentric ring, respectively.

10. The solid state lighting device (100) of claim 7, further comprising a second set of air flow apertures (130) defined by said first set of transverse members (118), said second set of transverse members (126), and said second set of arms (124).

11. The solid state lighting device (100) of claim 10, wherein at least one of said second set of radiating plates (128) comprises a shape substantially corresponding to a shape of one of said second set of air flow apertures (130).

12. The solid state lighting device (100) of claim 1, wherein said base (111) defines a radially outwardly directed perimeter (P), and said heat sink (108) further comprises a third set of radiating plates (132) extending generally longitudinally outwardly from said perimeter (P) of said light module receiving region (114).

13. The solid state lighting device (100) of claim 12, wherein at least one of said third set of radiating plates (132) comprises a shape substantially corresponding to a shape of one of said first set of air flow apertures (120).

14. The solid state lighting device (100) of claim 1, wherein said central light module receiving region (114), said first set of arms (116), and said first set of transverse members (118) are generally coplanar.

15. The solid state lighting device (100) of claim 1, further comprising said light module (102).