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LEDs, or Light-Emitting Diodes, are efficient, small, and power-saving devices used to light up circuits and indicate the activity occurring in them. Nowadays, they are rapidly overtaking the traditional methods of circuit board indicators, arrays, light bars, bar graphs and so on. This article aims to explain in detail their application field and working principle.

Application Fields

LEDs are ideal for a wide range of applications, as they are energy efficient and long lasting. These include domestic, commercial and industrial applications. Also, they can be used for area lighting, roadway lighting, electronic signs and signals, garden lighting, and more. In addition, they can also be used in printer cartridges, display backlighting, automotive indicators, flashlamps, and many other applications.

At home, LEDs can be used in task lighting, night lights, cooking lights, cove lighting, reading lights, and landscape lighting. In commercial and industrial settings, LEDs can be used for interior lighting, exterior lighting, high bay lighting, street lighting, parking lot lighting, billboard lighting, and in showcases and displays.

Working Principle

LEDs work in a similar way to standard diodes, but they are designed to convert electrical energy into visible light. When electricity is applied to an LED, it produces light. LED lights appear when a current is applied to the two leads, or pins, of an LED, allowing electrons to move from one pin to another.

The flow of electrons is facilitated by a diode junction between the two pins. These junctions, located at the junction between the two pins, serve as a barrier to the flow of current in one direction. This prevents current flowing from the anode to the cathode and leads to the current that’s necessary for the LED to glow.

LEDs have a special layer of semiconductor that makes them more efficient and brighter than a standard diode. This layer is made up of two different types of semiconductor material, an “n-type” and a “p-type”. When electricity is applied to the LEDs, the electrons cross the junction between the two different types of semiconductor material and create an electric field that causes the LED to emit light.

Summary

LEDs are increasingly becoming the go-to choice for circuit board indicators, arrays, light bars, and bar graphs. They are highly efficient, energy-saving devices that are now widely used in domestic, commercial, and industrial settings, including interior lighting, exterior lighting, task lighting, night lights, and more. The working principle of LEDs is quite simple, as a current is applied to the two pins of an LED, allowing electrons to move from one pin to another, thus producing light.

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