Patent ID: 8174196

Claim:
An alternating current light emitting diode (LED) device, comprising: a polygonal metal thermal conductive substrate having a plurality of indentations each respectively defined in a respective one of a plurality of corners of the polygonal metal substrate; a rectifier, which is a bridge rectifier with a first diode, a second diode, a third diode and a fourth diode, mounted on the metal thermal conductive substrate and comprising a first alternating terminal and a second alternating terminal to receive an alternating signal, and a first electrode and a second electrode to output a rectified signal; and a light emitting diode package mounted on the metal thermal conductive substrate and electrically connected to the first electrode and the second electrode; wherein the light emitting diode package is surrounded by the four diodes of the rectifier and the light emitting diode package and the rectifier are disposed on the same side of the metal thermal conductive substrate.