Led bulb structure

AN LED bulb structure, comprising:

• a heat dissipation base;
• a power connector disposed on a bottom side of the heat dissipation base;
• a light-emitting module including a circuit substrate disposed on a top side of the heat dissipation base and a plurality of LED chips electrically connected to the circuit substrate, wherein the LED chips are surroundingly disposed on a top surface of the circuit substrate and adjacent to an outer perimeter surface of the circuit substrate;
• an insulation cover disposed on the circuit substrate, wherein the insulation cover has a surrounding main portion, a convex portion disposed on a top side of the surrounding main portion, and a surrounding extending portion outwardly and surroundingly extended from a bottom side of the surrounding mina body and disposed on the circuit substrate;
• and
• a light-guiding cover disposed on the surrounding extending portion of the insulation cover to cover the surrounding main portion of the insulation cover, wherein the light-guiding cover has a through opening formed on a top side thereof for exposing the convex portion, the light-guiding cover has a light input curved surface, a light-reflecting curved surface, and a light output curved surface respectively formed on a bottom side, an inner surface, and an outer surface thereof, and a thickness of the light-guiding cover is decreased gradually from bottom to top.

N LED bulb structure, comprising:

• a heat dissipation base having a plurality of surrounding heat-dissipating fins surroundingly disposed on an outer perimeter surface thereof;
• a power connector disposed on a bottom side of the heat dissipation base;
• a light-emitting module including a circuit substrate disposed on a top side of the heat dissipation base and a plurality of LED chips electrically connected to the circuit substrate, wherein the LED chips are surroundingly disposed on a top surface of the circuit substrate and adjacent to an outer perimeter surface of the circuit substrate;
• a driving circuit electrically connected between the power connector and the light-emitting module;
• an insulation cover disposed on the circuit substrate;
• and
• a light-guiding cover covering the insulation cover, wherein the light-guiding cover has a light input curved surface, a light-reflecting curved surface, and a light output curved surface respectively formed on a bottom side, an inner surface, and an outer surface thereof, and a thickness of the light-guiding cover is decreased gradually from bottom to top;
• wherein a first receiving space is formed above the circuit substrate and surrounded by the insulation cover, a second receiving space is formed under the circuit substrate and is surrounded by the heat dissipation base.