Thermal management of LED-based illumination devices with synthetic jet ejectors
View Patent ↗An illumination device 1701 is provided which includes a light emitting portion 1703 ; an LED 1715 disposed within said light emitting portion; a threaded connector module 1705 adapted to rotatingly engage said illumination device to a source of electricity; a heat sink 1759 disposed between said light emitting portion and said connector module; and a synthetic jet ejector 1709 disposed between said light emitting portion and said connector module.
1. An illumination device, comprising:
a light emitting portion;
an LED disposed within said light emitting portion;
a threaded connector module adapted to rotatingly engage said illumination device to a source of electricity;
a heat sink disposed between said light emitting portion and said connector module; and
a synthetic jet ejector disposed between said light emitting portion and said connector module.
2. The illumination device of claim 1 , wherein said heat sink comprises a plurality of fins.
3. The illumination device of claim 1 , wherein said heat sink is annular in shape.
4. The illumination device of claim 1 , wherein said synthetic jet ejector is disposed within said heat sink.
5. The illumination device of claim 1 , wherein said synthetic jet ejector is disposed between said connector module and said heat sink.
6. The illumination device of claim 1 , wherein said light emitting portion comprises an optically transmissive housing, and wherein said LED is disposed within said optically transmissive housing.
7. The illumination device of claim 6 , wherein said optically transmissive housing is diffusively transmissive.
8. The illumination device of claim 6 , wherein said optically transmissive housing is bulbous.
9. The illumination device of claim 6 , wherein said optically transmissive housing is dome-shaped.
10. The illumination device of claim 1 , wherein said heat sink comprises a plurality of fins, and wherein said synthetic jet ejector is adapted to direct a synthetic jet into a channel formed by a pair of adjacent fins.
11. The illumination device of claim 1 , wherein said synthetic jet ejector comprises first and second diaphragms.
12. The illumination device of claim 1 , wherein said first and second diaphragms are arranged in parallel.
13. The illumination device of claim 1 , wherein each of said first and second diaphragms has a major planar surface which is parallel to a longitudinal axis of said illumination device.
14. The illumination device of claim 1 , wherein each of said first and second diaphragms has a major planar surface which is perpendicular to a longitudinal axis of said illumination device.
15. The illumination device of claim 1 , wherein said synthetic jet ejector comprises a voice coil.
16. The illumination device of claim 1 , wherein said synthetic jet ejector comprises a piezoelectric actuator.
17. The illumination device of claim 1 , wherein said LED is disposed on said heat sink.
18. An illumination device, comprising:
a housing having an LED disposed therein, wherein said housing is transmissive to light generated by said LED;
a threaded connector module which rotatingly engages a complimentary shaped electrical socket;
a heat sink disposed between said housing and said connector module, wherein said heat sink comprises a plurality of fins; and
a synthetic jet ejector which directs a synthetic jet into a channel formed by a pair of adjacent fins, wherein said synthetic jet ejector is disposed between said housing and said connector module.
19. The illumination device of claim 18 , wherein said synthetic jet ejector is disposed within said heat sink.
20. The illumination device of claim 18 , wherein said synthetic jet ejector is disposed between said connector module and said heat sink.
21. The illumination device of claim 18 , wherein said housing is diffusely transmissive to light generated by said LED.