Patent ID: 8820975

Claim:
An LED lighting device comprising: an LED module; a thermal base coupled with the LED module and configured to absorb heat, wherein the thermal base is formed in a flat plate shape; and a heat-pipe loop formed in a tubule shape and having working fluid injected thereinto and comprising a heat-absorption portion coupled with the thermal base and configured to absorb heat and a heat-dissipating portion configured to dissipate the heat absorbed by the heat-absorption portion, wherein the heat-pipe loop has a plurality of coils and the plurality of coils are radially disposed along the edge of the thermal base, wherein the heat-pipe loop is formed in a spiral structure and each coil of the heat-pipe loop is formed in a thin and long shape such that each coil of the heat-pipe loop has a length greater than a width, and one side of the thin-and-long coil is coupled to the thermal base, and the other side of the thin-and-long coil extends past an edge of the thermal base to an outside, and wherein the LED module is coupled to one surface of the thermal base, and the thin-and-long coil is aligned and arranged on the other surface of the thermal base such that a length direction of the thin-and-long coil is parallel to the other surface of the thermal base, thereby constituting the LED lighting device in a thin structure.