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What is an LED?
4 October 2016
A light-emitting diode (LED) is a two-lead semiconductor light source. It is a p–n junction diode, which emits light when activated. When a...
Discoveries and Early LED Devices
4 October 2016
Green electroluminescence from a point contact on a crystal of SiC recreates Round's original experiment from 1907. Electroluminescence as a...
Working Principles of LEDs
4 October 2016
The inner workings of an LED, showing circuit (top) and band diagram (bottom) A P-N junction can convert absorbed light energy into a proportional...
Considerations for LEDs in Use
4 October 2016
Power sources     Simple LED circuit with resistor for current limiting The current–voltage characteristic of an LED is similar...