Patent ID: 8053959

Claim:
A light-emitting diode (LED) lamp device, comprising: a light-emitting module, further comprising: at least an LED unit; a heat-conduction post, made of a metal of high thermal conductivity, formed in a cylindrical shape, having an upper end provided with at least a through hole, and a lower end; a substrate mounted with the LED unit and disposed on the upper end of the heat-conduction post; a transparent cover located centrally in the heat-dissipation module and covering the LED unit; a circuit board comprising an electrical circuit and electrically connected though the through hole of the heat-conduction post to the LED unit mounted on the substrate; and a base formed as a hollow shell having a receiving opening at a top of the hollow shell for receiving the circuit board therein, the base being located at the lower end of the heat-conduction post; and a heat-dissipation module comprising a plurality of cooling fins arranged in a radial pattern and connected annularly at intervals around and in contact with an outer periphery of the heat conduction post of the light-emitting module, each said cooling fin having a sharp outer rim folded back a predetermined distance toward the light-emitting module so as to form a bent edge thereof; wherein the bent edge has an arcuate folded-back portion and is folded close to a surface of the respective cooling fin, so that each said cooling fin is provided with a rib-like outer perimeter twice as thick as remaining portions of the respective cooling fin after the bent edge is formed.