What is a LED Unit on LED Screens?
What is a LED?: a light emitting diode (LED) is a tiny, electronic semiconductor that converts electric energy into visible light. The chemical compound used within an LED determines its color, brightness and power efficiency.
(What is a LED?)
Unlike incandescent lamps, LEDs have no filaments that can burn out or fail. Two types of LEDs are normally used in display technology, DIP(Oval LED) and SMD 3 in 1 (figures below).
(Oval LED (DIP))
(SMD 3 in 1)