LIGHT EMITTING DIODE HAVING AN IMPROVED TRANSPARENT ELECTRODE STRUCTURE FOR AC POWER OPERATION

摘要

An AC power light emitting diode having an improved transparent electrode structure is provided to prevent a p-electrode from being peeled off by locally concentrated excessive current by avoiding or reducing locally concentrated current in a light emitting cell and by supplying a light emitting diode for AC power capable of uniformly distributing current. A plurality of light emitting cells are formed on a single substrate(50), The light emitting cells include a semiconductor layer(54) of a first conductivity type, a semiconductor layer(60) of a second conductivity type positioned on a partial region of the semiconductor layer of the first conductivity type, and an active layer interposed between the semiconductor layers of the first and second conductivity types. A transparent electrode structure is disposed on each light emitting cell, including at least two portions separated from each other. The adjacent two of the light emitting cells are electrically interconnected by wiring(68). The at least two portions of the transparent electrode structure positioned on one of the adjacent light emitting cells are electrically connected to the semiconductor layer of the first conductivity type of the other light emitting cell by the interconnections. Each one of the at least two portions of the transparent electrode structure has a long shape in a current flow direction between the light emitting cells.