IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
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출원번호 |
US-0092112
(2011-04-21)
|
등록번호 |
US-8789973
(2014-07-29)
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발명자
/ 주소 |
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출원인 / 주소 |
|
대리인 / 주소 |
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인용정보 |
피인용 횟수 :
1 인용 특허 :
15 |
초록
▼
A liquid cooled LED lighting device includes a sealed housing containing an LED element that emits light. Cooling liquid is contained in the housing to disperse heat generated by the LED element. An enclosure containing compressible material is preferably immovably positioned within the housing and
A liquid cooled LED lighting device includes a sealed housing containing an LED element that emits light. Cooling liquid is contained in the housing to disperse heat generated by the LED element. An enclosure containing compressible material is preferably immovably positioned within the housing and outside of the optical path of the emitted light. The enclosure containing the compressible material compresses in response to expansion of the cooling liquid as it absorbs heat from the LED element. Advantageously, the cooling liquid and the enclosure containing the compressible material act to more efficiently cool the LED element, thereby providing higher light output and increased lifetime of the LED element.
대표청구항
▼
1. A liquid cooled LED lighting device comprising: a sealed housing having a transmissive aperture; an LED element contained in the housing and having an emitting area that emits light for transmission through the aperture; a cooling liquid filling the housing and in contact with the LED element to
1. A liquid cooled LED lighting device comprising: a sealed housing having a transmissive aperture; an LED element contained in the housing and having an emitting area that emits light for transmission through the aperture; a cooling liquid filling the housing and in contact with the LED element to absorb and disperse heat generated by the LED element; and a compressible material positioned within the housing, the compressible material operable to compress in response to expansion of the cooling liquid. 2. The LED lighting device of claim 1, wherein the compressible material is contained in an enclosure positioned outside of the optical path of the emitted light. 3. The LED lighting device of claim 2, wherein the enclosure containing the compressible material is immovably positioned within the housing. 4. The LED lighting device of claim 2, wherein the enclosure containing the compressible material is immovably positioned outside of the optical path of the emitted light. 5. The LED lighting device of claim 1, wherein the cooling liquid includes perfluorinated liquid. 6. The LED lighting device of claim 1, wherein the compressible material is air or nitrogen. 7. The LED lighting device of claim 2, wherein the enclosure includes a balloon. 8. The LED lighting device of claim 2, wherein the enclosure includes a tube having sealed ends. 9. The LED lighting device of claim 2, wherein the enclosure includes a spherical, toroidal or disc enclosure. 10. The LED lighting device of claim 1, wherein the enclosure includes a foam material containing a plurality of sealed gas pockets. 11. The LED lighting device of claim 1, further comprising a heatsink disposed inside the housing and attached to the LED element. 12. The LED lighting device of claim 1, further comprising a pump that circulates the cooling liquid to disperse the heat generated by the LED element. 13. The LED lighting device of claim 12, wherein the pump is disposed inside the housing. 14. The LED lighting device of claim 12, wherein the pump is an ultrasonic pump and is disposed inside the housing. 15. The LED lighting device of claim 12, wherein: the housing has an inlet and an outlet; and the pump is connected between the inlet and outlet, and is disposed outside of the housing. 16. The LED lighting device of claim 15, further comprising: a liquid chamber in fluid communication with the pump; and a plurality of cooling fins attached to the chamber. 17. The LED lighting device of claim 1, wherein the housing includes a recycling reflector having a reflective surface to reflect the emitted light back to the emitting area of the LED element. 18. The LED lighting device of claim 17, wherein the reflective surface is spherical in shape relative to the center of the emitting area of the LED element. 19. The LED lighting device of claim 18, wherein the LED element includes an LED array having at least one pair of LED elements emitting the same color and being symmetrically arranged about the center of the LED array such that the emitted light from one of the pair of LED elements is reflected back to the other one of the pair of LED elements. 20. The LED lighting device of claim 18, wherein the LED element includes one or more LED elements. 21. The LED light device of claim 18, wherein the LED element emits one or more colors. 22. The LED lighting device of claim 1, wherein the aperture includes a lens. 23. The LED lighting device of claim 1, further comprising a base attached to the housing and having a screw threaded contact. 24. A liquid cooled LED lighting device comprising: an LED element having an emitting area that emits light; a sealed housing having a transmissive aperture through which the emitted light passes, and a recycling reflector having a reflective surface, wherein the emitted light impinging on the reflective surface reflects back to the emitting area of the LED element; a cooling liquid filling the housing and in contact with the LED element to absorb and disperse heat generated by the LED element; and compressible material contained in the housing and operable to compress in response to expansion of the cooling liquid. 25. The LED lighting device of claim 24, wherein the reflective surface is spherical in shape relative to the center of the emitting area of the LED element. 26. The LED lighting device of claim 25, wherein the LED element includes an LED array having at least one pair of LED elements emitting the same color and being symmetrically arranged about the center of the LED array such that the emitted light from one of the pair of LED elements is reflected back to the other one of the pair of LED elements. 27. The LED lighting device of claim 24, wherein the cooling liquid includes perfluorinated liquid. 28. The LED lighting device of claim 24, wherein the compressible material is air or nitrogen. 29. The LED lighting device of claim 24, wherein the compressible material is contained inside a balloon. 30. The LED lighting device of claim 24, wherein the compressible material is contained inside a tube having sealed ends. 31. The LED lighting device of claim 24, wherein the compressible material is contained inside a spherical, toroidal or disc enclosure. 32. The LED lighting device of claim 24, wherein the compressible material includes foam material containing a plurality of sealed air pockets. 33. The LED lighting device of claim 24, further comprising a pump that circulates the cooling liquid to disperse the heat generated by the LED element. 34. The LED lighting device of claim 33, wherein the pump is disposed inside the housing. 35. The LED lighting device of claim 33, wherein: the housing has an inlet and an outlet; and the pump is connected between the inlet and outlet, and is disposed outside of the housing. 36. The LED lighting device of claim 24, wherein the aperture includes a lens. 37. A liquid cooled LED lighting device comprising: a sealed housing having a transmissive aperture; an LED element attached to the outside of the housing and having an emitting area that emits light; a cooling liquid filling the housing and in thermal contact with the LED element to absorb and disperse heat generated by the LED element; and a compressible material contained in the housing and operable to compress in response to expansion of the cooling liquid. 38. The LED lighting device of claim 37, further comprising a plurality of cooling fins attached to the housing. 39. The LED lighting device of claim 37, wherein the cooling liquid includes perfluorinated liquid. 40. The LED lighting device of claim 37, wherein the compressible material includes air or nitrogen contained in a sealed enclosure. 41. The LED lighting device of claim 37, wherein the compressible material includes foam material containing a plurality of sealed air pockets. 42. The LED lighting device of claim 37, further comprising a pump that circulates the cooling liquid to disperse the heat generated by the LED element. 43. The LED lighting device of claim 42, wherein the pump is disposed inside the housing. 44. The LED lighting device of claim 42, wherein: the housing has an inlet and an outlet; and the pump is connected between the inlet and outlet, and is disposed outside of the housing.
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