Patent ID: 8328394

Claim:
An LED bulb comprising: a heat sink comprising a base, a tube extending downwardly from a first face of the base, and a plurality of fins extending outwardly from an outer circumference of the tube; a circuit formed on a second face of the base; an LED disposed on the second face of the base and electrically connected with the circuit; a first lead and a second lead electrically connecting with the circuit and extending through the base; and a driving module comprising a contact portion, the contact portion comprising a first electrode, and a second electrode electrically insulated from the first electrode and surrounding the first electrode; wherein the first electrode of the driving circuit contacts with the first lead, and the second electrode of the driving circuit contacts with the second lead to electrically connect the LED with the driving module; wherein the first electrode is disc-shaped, the second electrode being arranged around a periphery of the first electrode; and wherein an annular insulted layer is arranged between the first electrode and the second electrode.