US Patent 7812361 Light emitting diode

A light emitting diode includes a substrate, a reflecting layer, an active layer, a transparent electrode, a first photonic crystal structure, and a second photonic crystal structure. The reflecting layer is disposed on the substrate. The active layer is disposed on the reflecting layer. The transparent electrode is disposed on the active layer and includes an upper surface and a lower surface. The lower surface of the transparent electrode combines with the active layer. The first photonic crystal structure is formed on the upper surface of the transparent electrode. The second photonic crystal structure formed in the active layer.