Light Emitting Diode

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A light emitting diode, often abbreviated LED, is a semiconductor diode that emits light when it is forward-biased. LEDs of many different colors are available, based on the wavelength of the light being emitted by the diode. Apart from LEDs that emit light visible to the human eye, special LEDs that emit ultra-violet (UV) or infra-red (IR) light are also available.

Applications

LEDs are used in an ever increasing number of applications. LEDs that emit visible lights are commonly used as indication lights, e.g. in electronic equipment, but are also used in LED traffic lights and indoor lighting. Infra-red LEDs are commonly used in remote controls and other communication equipment.

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