As said earlier, LEDs are a family of Diodes made of Semiconductors. The way it works is almost the same as the Diodes that have two poles of Positive (P) and Negative Pole (N). The LED will only emit light when the forward voltage is forwarded from the Anode to the Cathode.
LED consists of a doping semiconductor chip that creates P and N junctions. What is meant by the doping process in a semiconductor is the process of adding impurity to a pure semiconductor to produce the desired electrical characteristics. When the LED is fed by forward voltage or forward bias from Anode (P) to Cathode (K), Excess Electrons on N-Type material will move to the area of excess Hole (hole) which is positively charged (P-Type material). When Electrons meet the Hole it releases photons and emits monochromatic light (one color). If you want to see more led screen with a cheapest price you can visit Turnkey solutions for Security Systems
LEDs or Light Emitting Diodes that emit light when fed forward voltage can also be classified as a Transducer that can convert Electrical Energy into Light Energy.
How To Know LED Polarity
To know the polarity of the Anode (+) and Cathode (-) terminals on the LED. We can see it physically based on the picture above. The characteristics of Anode Terminals on LEDs are longer legs and also smaller lead frames. While the characteristics of the Cathode Terminal is a shorter leg with a large Lead Frame and located on the Flat side.
LED Color (Light Emitting Diode)
Currently, LEDs have a variety of colors, including red, yellow, blue, white, green, orange and infrared. The color diversity of the LED depends on the wavelength (wavelength) and the semiconductor compound it uses.
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