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What is the full form of LED?

Posted in Technology     MAY 4, 2021

What does LED stand for?

  • It is a very important electronic device used with most electronic devices. It is used in light bulbs, TV, watch, etc.
  • LED stands for Light Emitting Diode. It is a two-led semiconductor. It is on a PN junction that emits light when activated. It is a very important electric device that is used in a lot of electronics nowadays. It is used on gadgets such as TV, calculator, watches, radio, etc.

How does LED work?

  • It is a specialized form of PN junction that uses a compound junction. The junction conductor must be a compound semiconductor. Silicon and germanium are commonly used semiconductor materials as these materials do not emit light. Instead of compound semiconductors including gallium arsenide, gallium phosphide is compound semiconductors, and junctions from these materials do emit light.
  • The light-emitting diodes emit light when it is forward biased. A voltage is applied over a junction to make it forward-based, as is the case for any PN junction. Ptype region releases holes and the n-type region releases photons that recombine like a normal diode which releases some photons in the form of light. This effect is called electroluminescence
  • It is observed that most of the light comes out of the p-type region. If the lights have to be seen the junctions must be optimized and the right material should be chosen. Sometimes phosphorous can be added to emit red light. For other colors, other materials can be used. For example gallium phos[hide emits green light.
  • LED is proved to be a revolutionary product in the field of light sources. It is almost 80% efficient as compared to the normal light bulb

What are the advantages of using LED?

1. Energy-efficient:

LEDs require very little power. Most LEDs result in a 60-75% improvement in the overall efficiency of the facility's lighting. Depending on the LEDs the savings could also be more than 90%

2. Physically Small:

The led device is extremely small. The size can be less than a 10th of a single mm2 with the largest one can also be as small as mm2. This makes them extremely adaptable to large no. of light applications.

3. Life span:

This is one of the most significant advantages of LED its lifespan compared to other conventional bulbs. It also has a very low maintenance cost and very low-cost replacement parts. An average LED bulb can last for more than 50,000 operational to 100,000 operating hours. This is 40 times more than a conventional bulb.

4. Safety:

LEDs have very low recycling costs. The no. 1 hazard when it comes to lighting is heat emission. LEDs do not emit any forward heat as compared to fluorescent or conventional bulbs. They also function on low power and can also function on very low voltage. They are very safe compared to other bulbs.

5. Soldi state

LEDs are solid-state lights. This means the glass covering the conventional bulb uses is not required. Thus, they are much easier to use.

6. Directional Emissions:

LED emits light in only 180 degrees whereas every other light emits light in a 360-degree direction. This might seem like a drawback but 360-degree emissions need necessary objects to deflect upon to keep the room light up. This increases the cost of the device and makes it less efficient whereas LED completely solves this problem and gives the user a lot of savings on electricity.

7. Recyclable:

LEDs are recyclable and the recycling charges are also very low.

What are the various types of LED?

These are some of the various types of LEDs:


Known as red green blue LEDs they are 3 LEDs in one. You can control the intensity of each color. This type of LED has a 4 pin one for each color and a common pin. Common pin is the anode and others are the cathodes.

2. Built-in resistor:

There are some types of LEDs that come with a built-in resistor and also a small current resistor.

3. Surface Mound Packages:

They are not a type of LED but called a package. As LEDs have become smaller and smaller, manufacturers have figured out to cram more components in them. SMD is a smaller version of the standard parts that are available. SMD LEDs come in various sizes from very small to very large.

4. High Power:

These types of LEDs are very bright. An LED is considered high power if it can disband 1watt or more power. These are very high-quality LEDs found in very fancy lights. These types of LEDs can also be used as headlights in vehicles as they are so bright. LEDs of this kind sometimes require a heatsink. They sometimes release so much heat that the LED can damage itself if they don't have a proper cooling system.

5. Special LEDs:

Some LEDs emit light outside the visible spectrum. Such types of LEDs are used in a TV remote to send signals between the remote and the setup box. Sending small pieces of information in the form of invisible light.


The above article summarizes every piece of information related to LEDs. This article takes your What is LED, what is its full form, benefits of using an LED, how does LED work, and what are the various types of LEDs.