What is LED?

What is LED?


The name LED is an abbreviation for the English name for Light Emitting Diode. It is a semiconductor light source. Is available across the visible, ultraviolet, and infrared light. The LED diode consists of a semiconductor connector resulting from the combination of two types of semiconductor (type n and p). The release of energy in the form of photons or light, occurs in the flow of electrical current through the LED in a forward direction (or from layer p to layer n).


LEDs can emit light of different wavelengths (different colors) depending on the used dopant for material of the basic semiconductor. Notwithstanding, it is always a limited spectral division resulting in rather one color


In the case of LED there are three possibilities to obtain white light:
Mixturing colors of three onefold LED (red, green and blue) – RGB system.
Supplementing the blue color LED with yellow/​red phosphor – complementray colors system.
Supplementing LED with its UV radiation with phosphor – UV conversation system.