LED bulb for incandescent bulb replacement with internal heat dissipating structures

• US 9,395,075 B2
• Filed: 09/22/2014
• Issued: 07/19/2016
• Est. Priority Date: 03/26/2010
• Status: Active Grant

• Current Assignee: Ilumisys Incorporated (Altair Engineering Incorporated)
• Original Assignee: Ilumisys Incorporated (Altair Engineering Incorporated)
• Inventors: Simon, David L., Ivey, John
• Primary Examiner(s): Hanley, Britt D
• Application Number:
  US14/492,517
• Publication Number:
  US 20150009690A1
• Time in Patent Office: 666 Days
• Field of Search: None
• US Class Current: 1/1
• 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: F21K 9/232 specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
• CPC Class Codes: F21K 9/61 using light guides
• CPC Class Codes: F21V 21/00 Supporting, suspending, or attaching arrangements for lighting devices F21V17/00, F21V19/00 take precedence; arrangement of signalling or lighting devices, the mounting or supporting thereof or circuits therefor, for vehicles in general B60Q, stands for supporting apparatus or articles in general F16M11/00; Hand grips
• CPC Class Codes: F21V 23/009 the casing being inside the housing of the lighting device
• CPC Class Codes: F21V 23/06 the elements being coupling devices , e.g. connectors
• CPC Class Codes: F21V 29/15 Thermal insulation
• CPC Class Codes: F21V 29/508 of electrical circuits
• CPC Class Codes: F21V 29/70 characterised by passive heat-dissipating elements, e.g. heat-sinks
• CPC Class Codes: F21V 29/74 with fins or blades
• CPC Class Codes: F21V 29/83 the elements having apertures, ducts or channels, e.g. heat radiation holes
• CPC Class Codes: F21Y 2105/10 comprising a two-dimensional array of point-like light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: F21Y 2115/15 Organic light-emitting diodes [OLED]
• CPC Class Codes: Y10T 29/49002 Electrical device making

Abstract

An LED based light for replacing an incandescent bulb comprises a base having a first end and a second end; a connector fixed to the first end of the base, the connector adapted to physically connect to an incandescent light fixture; an open-ended light structure extending from the second end of the base, the light structure having an inner surface defining a cavity in fluid communication with an ambient environment and an opposing exterior outer surface; at least one LED arranged outward from the inner surface; and a heat dissipating structure for the at least one LED extending into the cavity.

Claims

1. An LED based light for replacing an incandescent bulb, comprising:

a base having a first end and a second end;

a connector fixed to the first end of the base, the connector adapted to physically connect to an incandescent light fixture;

an open-ended light structure extending from the second end of the base, the light structure having an inner surface defining a cavity in fluid communication with an ambient environment and an opposing outer surface forming an exterior of the LED based light;

at least one LED carried by the second end of the base and positioned between the inner surface and the outer surface of the open-ended light structure; and

a heat dissipating structure for the at least one LED extending into the cavity.

2. The LED based light of claim 1, wherein the heat dissipating structure includes a plurality of longitudinally extending pins.

3. The LED based light of claim 1, wherein the heat dissipating structure includes a plurality of longitudinally extending fins.

4. The LED based light of claim 1, further comprising:

an active heat dissipating device disposed for drawing air across the heat dissipating structure.

5. The LED based light of claim 1, further comprising:

a thermal insulating shroud disposed about the base.

6. The LED based light of claim 1, further comprising:

a thermal insulating shroud extending over the open end of the light structure to enclose the heat dissipating structure in the cavity.

7. The LED based light of claim 1, further comprising:

electronics housed in the base, the electronics configured to supply power to the at least one LED.

8. The LED based light of claim 7, wherein the base defines a plurality of apertures configured to allow airflow between the electronics and the ambient environment.

9. The LED based light of claim 1, wherein the at least one LED is arranged to emit light in a predetermined distribution that at least partially replicates that of an incandescent bulb.

10. The LED based light of claim 1, wherein the base and the heat dissipating structure are integrally formed.

11. The LED based light of claim 1, wherein the base, the light structure and the heat dissipating structure are integrally formed.

12. The LED based light of claim 1, wherein the light structure is an annular flange.

13. The LED base light of claim 1, wherein the outer surface is contoured to form a conical profile.

14. The LED base light of claim 1, wherein the outer surface is contoured to form a bulbous profile.

18. The LED based light of claim 1, further comprising:

a circuit board positioned on a distal end of the heat dissipating structure; and

at least one additional LED positioned on the circuit board.

19. The LED based light of claim 1, further comprising:

a disk located at a distal end of the heat dissipating structure, wherein the at least one LED is positioned on the disk.

15. An LED based light, comprising:

a base;

a connector fixed to the base, the connector adapted to physically connect to an incandescent light fixture;

an open-ended annular flange extending from the base along a longitudinal axis of the light, the flange having an inner surface defining a cavity in fluid communication with an ambient environment and an opposing exterior outer surface;

at least one LED mounted on the base opposite the connector and positioned between the inner surface and the outer surface of the open-ended annular flange; and

a heat dissipating structure for the at least one LED extending into the cavity.

16. The LED based light of claim 15, wherein the base, the flange and the heat dissipating structure are integrally formed.

17. The LED base light of claim 15, wherein the outer surface is contoured to form a conical profile.