Patent ID: 8188595

Claim:
An apparatus, comprising: a light-emitting device; and a 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; and a spiral condenser, coupled to the second layer, by which vapor condenses to liquid and returns to the second layer; and a 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.