초록 ▼

System, method, and apparatus for two phase cooling in light-emitting devices are disclosed. In one aspect of the present disclosure, an apparatus includes a light-emitting device and a two-phase cooling apparatus coupled to the light-emitting device. The coupling of the two-phase cooling apparatus

System, method, and apparatus for two phase cooling in light-emitting devices are disclosed. In one aspect of the present disclosure, an apparatus includes a light-emitting device and a two-phase cooling apparatus coupled to the light-emitting device. The coupling of the two-phase cooling apparatus and the light-emitting device is operatively configured such that thermal coupling between the light-emitting device and the two-phase cooling apparatus enables, when, in operation, heat generated from the light-emitting device to be absorbed by a substance of a first phase in the two-phase cooling apparatus to convert the substance to a second phase.

대표청구항 ▼

1. An apparatus, comprising: a light-emitting device; anda two-phase cooling apparatus coupled to the light-emitting device, wherein the two-phase cooling apparatus includes: a first layer which mounts the light-emitting device and channels vapor along a heat transfer region;a liquid-permeable porou

1. An apparatus, comprising: a light-emitting device; anda two-phase cooling apparatus coupled to the light-emitting device, wherein the two-phase cooling apparatus includes: a first layer which mounts the light-emitting device and channels vapor along a heat transfer region;a liquid-permeable porous structure, coupled to the first layer, which transports vapor to a vapor line, wherein the vapor is generated at a liquid meniscus of the liquid-permeable porous structure at a phase change temperature;a second layer, hydraulically coupled to the liquid-permeable porous structure, which contains liquid below a phase change temperature; anda spiral condenser, coupled to the second layer, by which vapor condenses to liquid and returns to the second layer; anda heat sink coupled to the spiral condenser, wherein vapor entering the spiral condenser spreads heat along a surface of the heat sink such that an interior temperature of the spiral condenser is substantially isothermal to a saturation temperature promoting transfer of heat to ambient air. 2. The apparatus of claim 1, wherein the liquid-permeable porous structure forms through-holes across the porous structure; wherein, the through-holes include first and second ends;and the apparatus further comprises a chamber that stores liquid coupled to the liquid-permeable porous structure;wherein, the first ends of the through-holes are proximal to the chamber;such that, when in operation, the porous structure is liquid permeable allowing the liquid in the chamber to travel through the through-holes towards the second ends and evaporation from a liquid meniscus at a phase change temperature creates vapor;and the spiral condenser has a series of spiraling fins to condense the liquid. 3. The apparatus of claim 2, wherein, the light emitting device is formed on a wafer or a die; wherein, the porous structures include porous semiconductor structures. 4. The apparatus of claim 2, wherein, in operation, the heat absorbed from the light-emitting device is at least a latent heat of the substance. 5. The apparatus of claim 4, further comprising, a corona discharge device coupled to the condenser to stimulate convection. 6. The apparatus of claim 2, wherein, the two phase cooling apparatus further comprises: a liquid port that couples the chamber to the condenser. 7. The apparatus of claim 2, further comprising: a heat sink coupled to the condenser. 8. The apparatus of claim 6, wherein, the series of spiraling fins utilizes gravity to cause the condensed liquid to flow down toward a coupled evaporator. 9. The apparatus of claim 2, wherein, the two-phase cooling apparatus further comprises: a vapor collection layer;wherein, the second ends of the through-holes are proximal to the vapor collection layer. 10. The apparatus of claim 9, wherein, the chamber is coupled to the light emitting device. 11. The apparatus of claim 9, wherein, when in operation, the heat generated from the light-emitting device causes the liquid stored in the chamber to travel through the through-holes and convert into vapor. 12. The apparatus of claim 9, wherein, the vapor collection layer is coupled to the liquid-permeable porous structure such that the first ends of the through-holes are substantially unobstructed to liquid or vapor flow. 13. The apparatus of claim 9, wherein, the vapor collection layer has formed within or is coupled to the vapor port. 14. The apparatus of claim 9, wherein, the vapor collection layer and the chamber are formed from material that is thermally conductive. 15. The apparatus of claim 9, wherein the vapor collection layer comprises substantially of, one or more of, Kovar, Invar, copper tungsten alloy, silicon, germanium, diamond, SiC, and/or CMOS-grade silicon. 16. The apparatus of claim 14, wherein the chamber is formed from one or more of, aluminum and copper. 17. The apparatus of claim 9, wherein the vapor collection layer comprises substantially of, copper. 18. The apparatus of claim 9, wherein the vapor collection layer comprises substantially of, aluminum nitride. 19. The apparatus of claim 9, wherein the chamber is formed from stainless steel. 20. The apparatus of claim 1, wherein, the two-phase cooling apparatus comprises a loop heat pipe, wherein the liquid-permeable porous structure is within the loop heat pipe, and the liquid-permeable porous structure has through-holes across the porous structure;wherein, the through-holes have a high length to diameter aspect ratio. 21. The apparatus of claim 20, wherein the loop heat pipe further comprises, a chamber suitable for storage of liquid coupled to the liquid-permeable porous structure. 22. The apparatus of claim 20, wherein the loop heat pipe further comprises, a top cap portion thermally coupled to the liquid-permeable porous structure. 23. The apparatus of claim 22, wherein the through-holes having first and second ends,wherein, the first ends of the through-holes are proximal to the top cap portion and the second ends of the through-holes are proximal to the chamber. 24. The apparatus of claim 23, wherein, the top cap portion is coupled to the liquid-permeable porous structure such that the first ends of the through-holes are substantially unobstructed to liquid or vapor flow. 25. The apparatus of claim 22, wherein, when in operation, the heat generated from the light-emitting device causes the liquid stored in the chamber to travel through the through-holes and convert into vapor. 26. The apparatus of claim 22, wherein, the top cap portion has formed within or is coupled to a vapor port. 27. The apparatus of claim 20, wherein, the through-holes have a length to diameter aspect ratio of approximately 60 to 205. 28. The apparatus of claim 1, wherein, the light-emitting device comprises wide band gap material based light emitting diode. 29. The apparatus of claim 1, wherein, the light-emitting device comprises a thin film light emitting diode. 30. The apparatus of claim 1, wherein, the two-phase cooling apparatus further comprises a vapor port coupled to the spiral condenser, wherein the vapor port is substantially unobstructed to allow the generated vapor to exit. 31. The apparatus of claim 1, wherein the two-phase cooling apparatus further comprises a chamber thermally coupled to the light-emitting device, wherein heat generated from the light-emitting device is absorbed by a liquid stored in the chamber. 32. The apparatus of claim 1, further comprising a heat sink coupled to the spiral condenser.