The invention provides an LED
bulb which comprises a lamp holder, an insulating
pipe, a heat radiating cup, an
LED circuit board and a lamp shade, wherein the bottom end of the insulating
pipe is screwed and locked on the lamp holder and the insulating
pipe is internally provided with a
driver circuit board
assembly with one end being eclectically connected with the lamp holder; the heat radiating cup is arranged above the insulating pipe, a concave-convex pattern structure is formed on the inner surface and the outer surface of the heat radiating cup, the bottom end of the heat radiating cup is provided with two lead through holes; at least one high-power LED is arranged on the
LED circuit board which is arranged on the inner bottom surface of the heat radiating cup, the
LED circuit board is electrically connected with the other end of the circuit board
assembly after penetrating through the lead through holes; and the lamp shaft is arranged on the top end of the heat radiating cup in a covering manner. According to the invention, heat generated by the LED is rapidly conducted and radiated by using the concave-convex pattern structure on the heat radiating cup.