Uses of LED

LED is a light-emitting diode, which is a semiconductor source of light. It emits light only when current flows through it.

An LED can emit a variety of colours. So what happens here is, the electron-hole combination releases energy in the form of chunks called packets, and the colour of the LED is ascertained by the energy released by electrons while crossing the energy bandgap in a semiconductor. Below you can see the multi-coloured LEDs:

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We find various uses of LED, starting from cell phones to TVs. Now, we will understand the uses of LED, application of LED.

LED Symbol

Just like the symbol of a battery, we have two terminals in a diode or an LED. Below is the LED symbol with its two terminals:

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Before we state the main practical application of led, we will understand some LED examples:

LED Examples

There are various types of LEDs that we find in our daily life applications; these are:

• Miniature LEDs

• Bi and Tri-colour LED

• Flash LED

• High-power LEDs

• Alphanumeric LED

• Red Green Blue or RGB LEDs

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             RGB LED

• Lightning LEDs (The ones we use as a Diwali light).

What are the Uses of LED?

We find the application of LED in various fields starting from optical communication, alarm to security systems. Furthermore, we find the uses of LED in remote-controlled operations, robotics, and much more.

We use LEDs because of their long-lasting capabilities, low power requirement, fast switching capacity, and rapid response time. 

Application of LED

The major uses of LED are in lightning objects and places. Its application is found everywhere, be it regarding the compact size, low energy consumption, extended lifetime, and flexibility in terms of use in various applications. The list of the uses of LED is as follows:

• TV backlight

• Dimming lights

• Smartphone displays

• Automobile industries

• Aviation lightning

• Horticulture glowlights

• General lightning

• Camera flashes

• Lighted wallpaper

• Medical devices

Now, we will understand what is the use of LED in detail:

What is the Use of LED?

1. TV Back-Lighting

The backlight of a TV is costumes with a lot of power. When we use LEDs, as a backlight, it offers efficient power usage. Similarly, the placements of the lights on an LED TV can differ which means light-emitting diodes can be placed either behind the screen or around its edges.

When we use an LED at the TV’s edges, we find the cost reduction choice.

Using LEDs just behind the display offers good contrast. Because of this reason, CFLs and LCDs have been replaced by LEDs in TV backlighting.

2. Smartphone Backlighting

The LED display is easily available in markets if your smartphone has lost its display. The application of LED helps in thinning the backlight design of our smartphones and also makes it at a low cost. However, the price of LED may vary as per the sizes of the display of your smartphone, also, the lower output voltage ensures a longer battery life.

3. Displays

In the present time, LED display boards are easily available and are used in places like storage signs, billboards, road signs, etc. 

Signboards having multiple languages convey signals with the help of LEDs, the use of more LEDs is always beneficial in terms of less power consumption.

4. Automotive Headlamps

LED usage in the automotive industry is rising sharply. It’s because LEDs save energy and make visibility clearer. 

Further, they come in use more often in the back and rear of an automobile and provide better accessibility.

Moreover, they can also enhance the pedestrian’s and driver’s safety because of enhanced visibility in rear views, especially during night journeys.

5. Dimming of Lights

We find the application of LEDs as dimming lights because they reduce energy consumption. We can also use the dimming feature in appliances that require global, and local dimming.

6. Optical Switching Applications

We find the use of an LED in burglar alarm systems, in power level indicators, and stereo amplifiers. 

Advantages of LED TVs

Below are the advantages of LED in a tabular form: 

LEDs have many other advantages over incandescent light sources, including the following:

1. Improved physical robustness, and

2. Smaller size

Do You Know?

Early LEDs were mostly used as indicator lamps, in place of small incandescent bulbs, and they had seven-segment displays. However, recent developments have introduced high-output, low-power consuming white light LEDs suitable for room and outdoor area lighting.