Screw-in LED bulb comprising a base having outwardly projecting nodes

• US 8,299,695 B2
• Filed: 06/01/2010
• Issued: 10/30/2012
• Est. Priority Date: 06/02/2009
• Status: Active Grant

• Current Assignee: Ilumisys Incorporated (Altair Engineering Incorporated)
• Original Assignee: Ilumisys Incorporated (Altair Engineering Incorporated)
• Inventors: Simon, David L., Ivey, John, White, Michael A.
• Primary Examiner(s): Santiago, Mariceli
• Application Number:
  US12/791,122
• Publication Number:
  US 20100301729A1
• Time in Patent Office: 882 Days
• Field of Search: 313498-512, 313317-31801, 313/318.12, 313 39- 47, 362/294, 362/249.02
• US Class Current: 313/318.01
• CPC Class Codes: B22D 17/002 using movable moulds for plastics B29C45/04
• CPC Class Codes: B22D 17/22 Dies manufacture, see the appropriate class, e.g. B23P15/24; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
• CPC Class Codes: B22D 17/2245 having walls provided with means for marking or patterning
• 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 29/87 Organic material, e.g. filled polymer composites; Thermo-conductive additives or coatings therefor
• CPC Class Codes: F21V 29/89 Metals
• CPC Class Codes: F21V 3/00 Globes; Bowls; Cover glasses with refracting properties F21V5/00; with reflecting properties F21V7/00; characterised by cooling arrangements F21V29/506
• CPC Class Codes: F21Y 2105/00 Planar light sources
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

An LED-based light can include a highly thermally conductive base having multiple radially outward projecting nodes. The nodes can be spaced apart in an axial and circumferential directions of the base. An electrical connector and at least one LED can be attached to the base, and a light transmitting bulb can be attached to the base and can cover the at least one LED. The geometry of the base can promote heat dissipation, which can allow the at least one LED to use enough power to produce an amount of luminosity that allows the LED-based light to replicate, for example, an incandescent light without overheating.

Claims

1. An LED-based light comprising:

a highly thermally conductive base defining multiple radially outward projecting nodes, the nodes spaced apart in axial and circumferential directions of the base, the base including recessed channels between the nodes to enable airflow in multiple directions about the base, wherein the nodes project from a surface of the base, and wherein the nodes have filleted edges at junctions between sides of the nodes and the surface and have rounded edges at junctions between sides of the nodes and distal ends of the nodes;

an electrical connector attached to the base;

at least one LED attached to the base; and

a light transmitting bulb attached to the base and covering the at least one LED.

2. The LED-based light of claim 1, wherein groups of more than one adjacent nodes are associated with respective imaginary radial pull lines, and wherein sides of each node are angled as the node extends radially outward such that each side extends parallel to its respective pull line or is angled further toward an opposing side of the node than its respective pull line.

3. The LED-based light of claim 1, wherein the nodes are arranged in rows extending circumferentially about the base and in columns extending axially along the base.

4. The LED-based light of claim 1, wherein the channels include a first group of axially extending channels and a second ground of circumferentially extending channels.

5. The LED-based light of claim 1, wherein a width of the bulb in a radial direction perpendicular to the axial direction of the base is at least 20% greater than a width of the base in the radial direction.

6. The LED-based light of claim 1, wherein the width of the bulb is at least 20% greater than a maximum width of the base in the radial direction.

7. The LED-based light of claim 6, wherein a height of the bulb in the axial direction of the base is as at least as great as the width of the bulb.

8. The LED-based light of claim 1, wherein the electrical connector is an Edison-type screw-in connector in electrical communication with the at least one LED.

9. The LED-based light of claim 1, wherein the base defines a cavity for housing electronics configured to convert a power received from the electrical connector to a power suitable for powering the at least one LED.

10. An LED-based light comprising:

a highly thermally conductive base defining multiple radially outward projecting nodes, the nodes spaced apart in axial and circumferential directions of the base, the base including recessed channels between the nodes to enable airflow in multiple directions about the base, wherein the nodes are arranged in rows extending circumferentially about the base and in columns extending axially along the base and wherein the nodes of each row are axially staggered;

an electrical connector attached to the base;

at least one LED attached to the base; and

a light transmitting bulb attached to the base and covering the at least one LED.

11. The LED-based light of claim 10, wherein groups of more than one adjacent nodes are associated with respective imaginary radial pull lines, and wherein sides of each node are angled as the node extends radially outward such that each side extends parallel to its respective pull line or is angled further toward an opposing side of the node than its respective pull line.

12. The LED-based light of claim 10, wherein the channels include a first group of axially extending channels and a second ground of circumferentially extending channels.

13. New The LED-based light of claim 10, wherein a width of the bulb in a radial direction perpendicular to the axial direction of the base is at least 20% greater than a width of the base in the radial direction.

14. The LED-based light of claim 13, wherein the width of the bulb is at least 20% greater than a maximum width of the base in the radial direction.

15. The LED-based light of claim 13, wherein a height of the bulb in the axial direction of the base is as at least as great as the width of the bulb.

16. The LED-based light of claim 10, wherein the electrical connector is an Edison-type screw-in connector in electrical communication with the at least one LED.

17. The LED-based light of claim 10, wherein the base defines a cavity for housing electronics configured to convert a power received from the electrical connector to a power suitable for powering the at least one LED.

18. The LED-based light of claim 10, wherein the nodes of each column have different axial lengths.

19. An LED-based light comprising:

a highly thermally conductive base defining multiple radially outward projecting nodes, the nodes spaced apart in axial and circumferential directions of the base, the base including recessed channels between the nodes to enable airflow in multiple directions about the base, wherein the nodes are arranged in rows extending circumferentially about the base and in columns extending axially along the base and wherein the nodes of each column have different axial lengths;

an electrical connector attached to the base;

at least one LED attached to the base; and

a light transmitting bulb attached to the base and covering the at least one LED.

20. The LED-based light of claim 19, wherein groups of more than one adjacent nodes are associated with respective imaginary radial pull lines, and wherein sides of each node are angled as the node extends radially outward such that each side extends parallel to its respective pull line or is angled further toward an opposing side of the node than its respective pull line.

21. The LED-based light of claim 19, wherein the channels include a first group of axially extending channels and a second ground of circumferentially extending channels.

22. The LED-based light of claim 19, wherein a width of the bulb in a radial direction perpendicular to the axial direction of the base is at least 20% greater than a width of the base in the radial direction.

23. The LED-based light of claim 22, wherein the width of the bulb is at least 20% greater than a maximum width of the base in the radial direction.

24. The LED-based light of claim 22, wherein a height of the bulb in the axial direction of the base is as at least as great as the width of the bulb.

25. The LED-based light of claim 19, wherein the electrical connector is an Edison-type screw-in connector in electrical communication with the at least one LED.

26. The LED-based light of claim 19, wherein the base defines a cavity for housing electronics configured to convert a power received from the electrical connector to a power suitable for powering the at least one LED.

27. The LED-based light of claim 19, wherein the nodes of each row are axially staggered.