THERMAL MANAGEMENT OF LED-BASED ILLUMINATION DEVICES WITH SYNTHETIC JET EJECTORS

• US 20110089804A1
• Filed: 10/12/2010
• Published: 04/21/2011
• Est. Priority Date: 07/15/2008
• Status: Active Grant

• Current Assignee: Nuventix, Inc. (LTI Flexible Products Inc.)
• Original Assignee: Nuventix, Inc. (LTI Flexible Products Inc.)
• Inventors: Heffington, Samuel N., Grimm, Daniel N., Darbin, Stephen P., Mahalingam, Raghavendran
• Granted Patent: US 8,579,476 B2
• Time in Patent Office: Days
• US Class Current: 313/46
• CPC Class Codes: F21K 9/232 specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
• CPC Class Codes: F21V 29/51 using condensation or evaporation of a fluid, e.g. heat pipes
• CPC Class Codes: F21V 29/63 using electrically-powered vibrating means; using ionic wind
• CPC Class Codes: F21V 29/74 with fins or blades
• CPC Class Codes: F21V 29/745 the fins or blades being planar and inclined with respect to the joining surface from which the fins or blades extend
• CPC Class Codes: F21V 29/76 with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
• CPC Class Codes: F21V 29/83 the elements having apertures, ducts or channels, e.g. heat radiation holes
• 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 2107/40 on the sides of polyhedrons, e.g. cubes or pyramids
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

An illumination device (b1-01) is provided which comprises a housing (b1-03) equipped with an aperture (b1-37), first (b1-33) and second (b1-35) diaphragms disposed in said housing and in fluidic communication with said aperture, and an LED (b1-15) disposed between said first and second diaphragms.

Claims

1. An illumination device, comprising:

a housing;

a pedestal disposed in said housing;

a synthetic jet ejector supported by said pedestal; and

at least one LED supported by said synthetic jet ejector.

3. The illumination device of claim 1, wherein said synthetic jet ejector has first and second opposing surfaces having first and second LEDs, respectively, disposed thereon.

4. The illumination device of claim 1, wherein said synthetic jet ejector has third and fourth opposing surfaces having third and fourth LEDs, respectively, disposed thereon.

5. The illumination device of claim 1, wherein said synthetic jet ejector is essentially polyhedral in shape, wherein said synthetic jet ejector is attached to said pedestal across a first face of said polyhedron, and wherein at least one LED is disposed on each of the remaining faces of said polyhedron.

10. The illumination device of claim 1, wherein said LED is supported on a surface of said synthetic jet ejector, and wherein said synthetic jet ejector is adapted to emit a plurality of synthetic jets across said surface and adjacent to said LED.

12. The illumination device of claim 1, wherein said synthetic jet ejector has first and second diaphragms, wherein said housing has a longitudinal axis, and wherein said first and second diaphragms are oriented parallel to said longitudinal axis.

13. The illumination device of claim 1, further comprising:

a threaded connector module adapted to rotatingly engage said illumination device to a source of electricity.

15. The illumination device of claim 1, wherein said housing has at least one aperture therein such that the interior of said housing is in fluidic communication with the exterior of said housing.

16. The illumination device of claim 1, wherein said synthetic jet ejector has a plurality of fins disposed on an external surface thereof.

17. The illumination device of claim 16, wherein said synthetic jet ejector is adapted to emit a synthetic jet into a channel formed by opposing fins of said plurality of fins.

24. The illumination device of claim 1, wherein said pedestal comprises a heat pipe.

2. (canceled)

6-9. -9. (canceled)

11. (canceled)

14. (canceled)

18. An illumination device, comprising:

a housing;

a threaded connector module adapted to rotatingly engage said illumination device to a source of electricity;

a synthetic jet actuator disposed in said connector module;

a manifold disposed on said housing and having a plurality of apertures therein;

an LED disposed on said manifold; and

a conduit in fluidic communication with said manifold and said synthetic jet actuator.

23. The illumination device of claim 18, wherein said LED is disposed adjacent to at least one of said plurality of apertures.

25. The illumination device of claim 18, further comprising a threaded connector module portion adapted to rotatingly engage said illumination device to a source of electricity, and wherein one end of said heat pipe terminates in said connector module portion.

19-22. -22. (canceled)

26-31. -31. (canceled)

32. An illumination device, comprising:

a heat spreader;

a housing, wherein said housing and said heat spreader form at least part of a hermetically sealed enclosure; and

an LED disposed on said heat spreader and within said enclosure.

33. The illumination device of claim 32, further comprising a synthetic jet ejector, wherein said synthetic jet ejector is external to said enclosure.

36. The illumination device of claim 32, further comprising:

a threaded connector module adapted to rotatingly engage said illumination device to a source of electricity.

34. (canceled)

35. The illumination device of claim 34, further comprising a heat sink, and wherein said synthetic jet ejector is in fluidic communication with said heat sink.

37. An illumination device, comprising:

a housing equipped with an aperture;

first and second diaphragms disposed in said housing and in fluidic communication with said aperture; and

an LED disposed within said housing and between said first and second diaphragms.

38. The illumination device of claim 37, wherein said first and second diaphragms are associated with first and second synthetic jet actuators.

41. The illumination device of claim 37, wherein said LED is disposed adjacent to said aperture.

39-40. -40. (canceled)

42-46. -46. (canceled)

47. An illumination device, comprising:

a housing;

an active diaphragm disposed in said housing;

a passive diaphragm disposed in said housing, said passive diaphragm being in fluidic communication with said active diaphragm; and

an LED disposed in said housing.

48. The illumination device of claim 47, wherein said LED is disposed between the active diaphragm and the passive diaphragm.

49. The illumination device of claim 48, wherein at least one of said active and passive diaphragms has a reflective surface.

51. The illumination device of claim 48, wherein at least one of said active and passive diaphragms has a surface which is reflective to the radiation emitted by said LED.

52. The illumination device of claim 51, wherein said reflective surface is specularly reflective.

53. The illumination device of claim 51, wherein said reflective surface is diffusely reflective.

50. (canceled)

54. An illumination device, comprising:

a base;

a helical portion in open communication with said base, said helical portion comprising an optically transmissive material;

a synthetic jet actuator disposed in said base; and

an LED disposed in said base, said LED being in optical communication with said helical portion.

55-71. -71. (canceled)