LED bulb for incandescent bulb replacement with internal heat dissipating structures

Patent metadata

Field	Value
Publication number	US-9395075-B2
Application number	US-201414492517-A
Country	US
Kind code	B2
Filing date	Sep 22, 2014
Priority date	Mar 26, 2010
Publication date	Jul 19, 2016
Grant date	Jul 19, 2016

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.

First claim

The invention claimed is:

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.

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.

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.

Assignees

• Ilumisys Inc

Inventors

• Simon David L
• Ivey John

Classifications

• F21V29/70

  characterised by passive heat-dissipating elements, e.g. heat-sinks · CPC title

• F21V29/15

  Thermal insulation · CPC title

• F21K9/23

  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 title

• Y10T29/49002

  Electrical device making · CPC title

• F21V29/74

  with fins or blades · CPC title