Wi-Fi connections, currently, are one of the most used tools by users of mobile devices, thousands of hours are the ones that Internet users invest in navigating through the virtual world and sharing an endless variety of contents.

Users seek, at all times, stable connections that allow them to perform this activity without any inconvenience or hindrance and this is where 3G, 4G or Wi-Fi connections make their entrance. However, there are times when these systems are easily saturated, as in places with large crowds of people, leaving users without connections that allow them to communicate in the digital world.

For these inconveniences it would be good to have a complementary or even more personal system. This could be done through a technology known as Visible Light Communications, or also called Optical WLAN or Li-Fi.

It is more than 100 years that researchers and experts have been investigating this technology that, every day that passes, is closer to becoming reality. This popular technology involves the transmission of data at frequencies between 400 and 800 THz (visible spectrum of humans) in an open space.

In other words, it is intended that information can be transmitted with conventional lighting elements, such as LED bulbs, at the same time they illuminate a room, only adding a few cheap and easy to manufacture elements to current bulbs.

Studies and tests have been many, but it was until 2011, when Professor Harald Hass of the University of Edinburgh showed the first device that transmitted 10Mbps through Li-Fi. Event that led researchers to know the true potential of technology.

Li-Fi communications will come to revolutionize a time of susceptibilities. The Wi-Fi connections present some weaknesses that with the arrival of the Li-Fi are looking to eliminate. Mainly seeks to transmit high-speed data at the same time a room is illuminated, as well as not saturating the part of the spectrum currently used as it is visible light.

Other advantages are that the information arrives through the light beam of the LEDs, which helps to create a dispersed beam that provides wide coverage or a very thin beam that illuminates small regions in a directional way.

On the other hand, the transmissions of large volumes of data between equipment or multimedia devices is another quality of this technology. It will allow to send videos of the mobile to a smart television of fast form or to be able to copy a hard disk of network only with aiming the telephone to the TV or to the hard disk during seconds.

However, all that glitters is not gold. There are some drawbacks, its reduced reach is one of them, as well as the cut of coverage when an object gets in the beam of light.

Although adjustments, investigations and tests are still needed, this technology is one of the most interesting trends of today, because it has great potential, speed, low cost, does not saturate the usual electromagnetic spectrum and promises great things with little consumption Of battery.

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