Patent ID: 7659546
Filing Date: 2010-02-09
Classification: H01L

Abstract:
1. A light emitting device, comprising: a light emitting diode (LED) structure, including a top surface with a light emitting region; a heterojunction within the LED structure, the heterojunction including a p-type and an n-type semiconductor layer; a first and second p-electrode positioned on the top surface substantially located on a periphery of the top surface, said p-electrodes each being electrically connected to the p-type semiconductor layer, wherein the first and second p-electrodes are physically separated from each other; an n-electrode that is positioned in a substantially central location on the top surface and that is electrically connected to the n-type semiconductor layer; wherein the heterojunction comprises a first heterojunction region and a second heterojunction region, the first heterojunction region being defined between the first p-electrode and the n-electrode and the second heterojunction region being defined between the second p-electrode and the n-electrode, said n-electrode being common grounded; an alternating current power source that is electrically connected such that the first and second heterojunction regions are powered repeatedly, sequentially and alternately in the time domain.