Light emitting diode luminaire

• US 9,062,868 B2
• Filed: 10/18/2013
• Issued: 06/23/2015
• Est. Priority Date: 12/12/2008
• Status: Active Grant

• Current Assignee: Bridgelux Incorporated
• Original Assignee: Bridgelux Incorporated
• Inventors: Scott, Keith
• Primary Examiner(s): HAN, JASON
• Application Number:
  US14/057,952
• Publication Number:
  US 20140043834A1
• Time in Patent Office: 613 Days
• Field of Search: 362/249.02, 362/294, 362/311.02, 362/373, 362/545, 362/800
• US Class Current: 1/1
• CPC Class Codes: F21S 8/02 of recess-mounted type, e.g. downlighters specially adapted for vehicle exteriors F21S41/00-F21S45/00
• CPC Class Codes: F21V 19/0055 by screwing
• CPC Class Codes: F21V 27/00 Cable-stowing arrangements structurally associated with lighting devices, e.g. reels storing lengths of cable in general B65H; the lighting devices being vehicle headlamps F21S41/192; the lighting devices being vehicle lights F21S43/195
• CPC Class Codes: F21V 29/67 characterised by the arrangement of fans
• CPC Class Codes: F21V 29/677 the fans being used for discharging
• 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 luminaire includes a light fixture having a heat conductive shell having an opening and at least one LED positioned on a plate within the heat conductive shell to emit light through the opening, wherein the heat conductive shell further comprises an ionic wind fan positioned on the plate so as to directly cool said at least one LED by moving air heated by the at least one LED through the opening.

Claims

1. A luminaire, comprising:

a light fixture configured for a ceiling or wall, the light fixture comprising;

a heat conductive shell having an opening;

at least one LED positioned-within the heat conductive shell to emit light through the opening; and

an ionic wind fan positioned to directly cool said at least one LED, wherein said at least one LED and the fan are separated from each other by stand-offs.

2. The luminaire of claim 1 wherein said at least one LED comprises an array of LEDs.

3. The luminaire of claim 1 further comprising a substrate having a cavity, wherein said at least one LED is in the cavity.

4. The luminaire of claim 1 further comprising a base attached to the light fixture, wherein the base supports a plate on which the at least one LED is mounted.

5. The luminaire of claim 1 wherein the plate provides a feedthrough for coupling wires to said at least one LED and the fan.

6. The luminaire of claim 1 wherein said at least one LED is supported by the plate via a plurality of standoffs, and wherein said at least one LED includes wires for coupling to a power source, each of the wires being routed through one of the insulating standoffs.

7. The luminaire of claim 1 further comprising a lens covering the opening in the light fixture.

8. The luminaire of claim 1 wherein the light fixture comprises a recessed light fixture.

9. The luminaire of claim 8 wherein the recessed light fixture is configured for an insulated ceiling or wall.

10. The luminaire of claim 8 wherein the recessed light fixture is configured for a non-insulated ceiling or wall.

11. The luminaire of claim 1 wherein the light fixture is configured to be attached to a track in a track lighting configuration.

12. The luminaire of claim 1, wherein the wherein the light fixture comprises a first opening and the heat conductive shell comprises a second opening configured to pass the light emitted from said at least one LED.

13. The luminaire of claim 12, wherein the ionic wind fan is positioned to move air heated by the at least one LED through the first and second openings.

14. The luminaire of claim 1, the light fixture comprising:

an outer wall surrounding the heat conductive shell, thereby forming an air flow path from an interior space of the heat conductive shell to a space between the heat conductive shell and the outer wall; and

wherein the heat conductive shell comprises a vent.

15. The luminaire of claim 1, wherein said at least one LED is not in direct physical or thermal contact with a heat sink.

16. A luminaire, comprising:

a light fixture;

configured for a ceiling or wall, the light fixture comprising;

a heat conductive shell having an opening; and

at least one LED positioned within the heat conductive shell to emit light through the opening;

wherein each of said one LED is arranged with a phosphor layer to emit light through the phosphor layer; and

an ionic wind fan positioned to directly cool said at least one LED, wherein said at least one LED and the fan are separated from each other by stand-offs.

17. A luminaire, comprising:

a light fixture configured for a ceiling or wall, the light fixture having a first opening, the light fixture comprising;

a heat conductive shell having a second opening;

at least one LED positioned within the heat conductive shell to emit light through the first and second openings, wherein

said at least one LED is not in direct physical or thermal contact with a heat sink; and

each of said one LED is arranged with a phosphor layer to emit light through the phosphor layer; and

an ionic wind fan positioned within the light fixture to directly cool said at least one LED.

18. The luminaire of claim 17 wherein said at least one LED comprises an array of LEDs.

19. The luminaire of claim 17 further comprising a substrate having a cavity, wherein said at least one LED is in the cavity.