What Is LED


LEDs are all around us. They are present in our smart phones, our homes and even in our cars. Any time something electronic lights up, there is a possibility that an LED is working behind it. They come in different forms of shapes, colors and sizes, but it doesn’t matter how they look they have one thing in common: they are bacon of electronics. They are widely supposed to make any project better and they are present in almost every single electronic product.

Before we go further, let’s have a look at the definition:

What Is LED?

LED stands for “Light Emitting Diode”. A diode is an electrical element having two terminals which are liable to conduct the electricity in one direction. With the help of an electric current, the diode produces a bright light around the small bulb. Normally, the diodes have been used in many technologies like televisions, computers and radios as an electric element for conduction.

In short, they are like small light bulbs. However, they need a lot less power to light up by comparison. They are also known as more energy efficient, so there is no chance that they will get hot like conventional light bulbs do (unless you are really pumping power into them). This is the main reason that they are ideal for using in mobile devices and other applications that require low power. Well, you don’t have to count them out of the high-power game. High-intensity light emitting diodes have found their way into spotlights, accent lighting and also automotive headlights.

Energy Efficiency:

Energy efficiency is one of the biggest reasons to use them. Energy efficient lighting choices are helpful to lower your utility bills and lessen the burden on non renewable energy sources. Light emitting diodes are the most efficient lights on the market and they are starting to appear with glowing and compact fluorescent bulbs in hardware stores and home good stores. They are, however, a mystery to many people, as many of them are unaware with their inner workings because they work differently than standard bulbs.

How They Work?

When you connect a diode to an electrical current, it will excite the electrons within the diode, which will make them release photons, which we observe as light. The color of the light is a direct result of the energy gap present in the semiconductor of a diode. This means that light emitting diodes can easily produce spectrum of colors and bright light while using a very small amount of electricity.

How LEDs Helped LCD Makers?

The TVs that were most dramatically reduced in size were those that changed from a backlight situated behind the panel, to one situated along the edges. This means the large tubes that were previously behind the panel were gone, and everything could be pressed close together.

Furthermore, the move to light emitting diodes meant that there was less heat produced as well, so there was less need for internal airflow, offering further size reduction.

Makers had another reason to love more slender and lighter TVs however. With the size and weight decrease, they become easier, less expensive and all the more environment friendly for shipping around the globe. They are preferred for the environment over the old CCFL fluorescent tubes that used to be found in LCD TVs because they don’t have such huge numbers of dreadful chemicals, and also make use of less power. What’s more, that cost decrease means the general population also adores them.

There are three primary types of “backlight”. The first isn’t a backlight, but it’s a sidelight and the innovation enables TVs to be thin in reality. In this system, they are set down the side of the TV and then a complicated diffuser takes the light and conveys it over the entire LCD panel. This innovation is useful for making slimmer TVs, however, it creates issues with regards to lighting. Early edge-lit LCD TVs were particularly terrible when it went to the corners and edges. It was common to see brightest spots in these zones, particularly when the screen was showing a dull picture, or complete darkness. Generally, these TVs were not meant for picture quality fans, but rather for individuals who were more worried about impressing guests.


In search for the energy efficient lighting, light emitting diodes have proven to be the most efficient bulbs available in the market. According to U.S. Department of Energy; Energy Star rated LEDs use at least 75% less energy as compared to traditional incandescent bulbs and lasts 25 to minutes longer. They also outdo CFL bulbs in efficiency, mainly because they have twice the lifespan of CFLs. They are more efficient than both CFLs and incandescent bulbs.


The biggest problem for consumer while buying LEDs for residential use is the upfront cost. While replacing the bulbs for multiple lighting fixtures, the idea of spending huge amount on bulbs frightens many consumers. However, the production of light emitting diodes is not only improving but it is also increasing day by day, which will mean greater affordability for the buyers in near future.

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