Convective cooling based lighting fixtures

• US 20090323341A1
• Filed: 02/27/2009
• Published: 12/31/2009
• Est. Priority Date: 06/28/2007
• Status: Abandoned Application

• Current Assignee: Snaptrack Incorporated (Qualcomm, Inc.)
• Original Assignee: Boundary Net, Inc.
• Inventors: Chui, Clarence
• Application Number:
  US12/380,588
• Publication Number:
  US 20090323341A1
• Time in Patent Office: Days
• US Class Current: 362/249.02
• CPC Class Codes: G09G 2300/026 Video wall, i.e. juxtaposition of a plurality of screens to create a display screen of bigger dimensions
• CPC Class Codes: G09G 2330/04 Display protection
• CPC Class Codes: G09G 2330/045 Protection against panel overheating
• CPC Class Codes: G09G 3/32 semiconductive, e.g. using light-emitting diodes [LED]
• CPC Class Codes: G09G 3/3406 Control of illumination source illumination devices structurally associated with liquid crystal cells G02F1/1336
• CPC Class Codes: G09G 3/3413 Details of control of colour illumination sources
• CPC Class Codes: G09G 3/342 using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
• CPC Class Codes: G09G 3/3426 the different display panel areas being distributed in two dimensions, e.g. matrix

Abstract

Convective cooling based lighting fixtures are disclosed. In some embodiments, a lighting fixture comprises a paddle configured to move in one or more directions and a set of one or more heat generating lighting elements mounted on the paddle. The motion of the paddle results in convective cooling of the set of lighting elements.

Claims

1. A lighting fixture, comprising:

a paddle configured to move in one or more directions; and

a set of one or more heat generating lighting elements mounted on the paddle;

wherein motion of the paddle results in convective cooling of the set of lighting elements.

2. The lighting fixture recited in claim 1, wherein the paddle is configured to rotate about an axis of rotation.

3. The lighting fixture recited in claim 1, wherein the paddle is configured to move translationally.

4. The lighting fixture recited in claim 1, further comprising a motor coupled to the paddle and configured to move the paddle.

5. The lighting fixture recited in claim 1, further comprising a casing in which one or more components of the lighting fixture including the paddle are situated.

6. The lighting fixture recited in claim 5, wherein the casing includes an inlet valve and an outlet valve for exchange of air between a cavity of the lighting fixture and an external environment.

7. The lighting fixture recited in claim 5, wherein the casing includes a cover lens.

8. The lighting fixture recited in claim 5, wherein the casing includes a heat sink shell.

9. The lighting fixture recited in claim 1, further comprising a plate positioned above the paddle and configured to move in an opposite direction as the paddle.

10. The lighting fixture recited in claim 1, wherein the set of lighting elements comprises light emitting diodes (LEDs).

11. The lighting fixture recited in claim 1, wherein the set of lighting elements comprises high powered light emitting diodes (LEDs).

12. The lighting fixture recited in claim 1, wherein the paddle comprises a printed circuit board (PCB).

13. The lighting fixture recited in claim 1, wherein the paddle is circularly shaped.

14. The lighting fixture recited in claim 1, wherein the lighting fixture comprises a set of one or more paddles including the paddle.

15. The lighting fixture recited in claim 1, wherein at least one lighting element comprises a lighting element configured to dissipate heat via a top surface of the lighting element.

16. The lighting fixture recited in claim 15, wherein the at least one lighting element comprises a light emitting diode die topped with one or more transparent, thermally conductive materials.

17. The lighting fixture recited in claim 16, wherein the one or more transparent, thermally conductive materials comprise one or more of silicon dioxide (SiO₂) and indium tin oxide (ITO).

18. The lighting fixture recited in claim 1, wherein the lighting fixture comprises one or more of a spotlight, a stadium light, a stage light, and a concert light.

19. A method for providing a lighting fixture, comprising:

configuring a paddle to move in one or more directions; and

mounting a set of one or more heat generating lighting elements on the paddle;

wherein motion of the paddle results in convective cooling of the set of lighting elements.

20. A light emitting diode, comprising:

a light emitting diode die;

a layer of silicon dioxide (SiO₂) deposited on the light emitting diode die; and

a layer of indium tin oxide (ITO) deposited on the layer of silicon dioxide.