Patent ID: 7474287
Filing Date: 2009-01-06
Classification: H05B

Abstract:
1. A light emitting device (LED), comprising: a time delay mechanism in electrical connection with a power source for time shifting at least a portion of a power signal outputted by the power source; and a plurality of light emitting units formed by at least a light emitting diode (LED)structure, each light emitting unit being driven alternately and sequentially using the power source and the time delay mechanism; the plurality of light emitting units being formed by a single LED, wherein the LED includes; a top surface with a light emitting region, the top surface including a transparent or semi-transparent electrode layer; a heterojunction within the device structure, the heterojunction comprising a p-type and an n-type semiconductor layer; a plurality of electrodes positioned on the top surface, each being electrically connected to one of the p-type and n-type semiconductor layers, wherein at least a first and a second of the plurality of electrodes are connected to a same type semiconductor layer and are physically separated from each other; at least a first and a second heterojunction within the heterojuntion, each being respectively defined between one of the first and second electrodes and one of the other electrodes connected to the other type semiconductor layer; wherein each heterojunction region forms one of the light emitting units.