A light-emitting diode is a two-lead semiconductor diode which glows when a voltage is applied.
An LED consists of two elements of processed material calledP-typesemiconductors andN-type semiconductors. These two elements are placed in direct contact, forming a region called the P-N junction.
Modern LED Lamp
The LED technology was discovered in 1907 by British radio researcher and assistant to Guglielmo Marconi, Henry Joseph Round.
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