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What is Li-Fi and how does it work?


LiFi is a wireless optical networking technology that uses LEDs for data transmission. Like Wi-Fi, it is also a wireless network...

The Internet has changed the world's picture today, everybody uses the Internet. Nowadays the use of the Internet is increasing too much, we do all our work by sitting at home with the help of internet and saves a lot of time.

Technology is increasing every day, from this we can use all the features of the internet. If we have to use the internet, then we use our mobile internet or Wi-Fi Network. But now you can use more advanced networks than Wi-Fi to use the internet, that's name is Li-Fi.

If you want to get this information about Li-Fi technology, then read this post from start to finish. Only then you will be able to get full information about it and you will be able to use it. So let's know what is Li-Fi.

What is Li-Fi?

It was invented by Professor Harald Haas in 2011. It is a high speed optical wireless technology. This LiFi technology uses visual lights (LED bulb lights) in digital information transmission. You know that this technology is similar to WiFi, however, there are many differences between WiFi and LiFi, both are the same because both share information wirelessly.

WiFi transmits data through Radio Waves, while LiFi uses Visible Light Communication. This technology works on Light Bulb (LED) lighting. LiFi Visible Light Communication This is optical communication technology. In which Visible Light Rays are used, this ray range is 400-800 Thz.

Due to the transfer of data via lights in this technology, it speeds around 224 Gbps, which is almost 1000 times higher than WiFi. This means that in this technology you can download movies, videos, standing under an LED bulb in seconds. The advantage of this is that with the service of the Internet, there will never be darkness in your room because when you turn on the LiFi bulb, the light will brighten out and the internet will also be turned on.

Li-Fi full form

"Light Fidelity"

How does Li-Fi work?

It works just like all other internet devices. Before you know how it works, you should know what components are used on Li-Fi. Li-Fi basically uses the following three components.
  • Lamp driver
  • Led lamps
  • Photo Detector
Along with these three components, you need another Connection, which you and I call the Internet. I have already given you information, it transmits data through lights.

Internet source is connected to the Lamp Driver. The information that comes from the Lamp Driver Internet Cables transmits it inside the Led Bulb. After that light which comes in the Led Bulb, it is easy to recognize the changes in the Photodetector as it collides with the Photodetector.

LED bulbs have a few Characteristics. LED Bulbs are the right material for LiFi due to Light Emitting Diode and Fluorescent Component. LiFi requires high-speed data rate and the light intensity of the LED bulb changes rapidly. Light is sometimes on and sometimes off.

Photo Detector converts Lights Signals into binary data. Then send the computer and smartphone to be processed. How the data comes from the Led Lamp via the Lamp Driver and then the Photo Detector comes from mobile, in the same way, the data from the opposite mobile can be returned to the receiver via Led Lamp.

If you are standing under Light Source and if you are also moving, then your connection will not be cut. If you move from a Light Spot and move into another Light Spot, it will automatically switch to the second Light Spot.

History of Li-Fi

Prof. Herald Haas, he was from the University of Edinburgh in the UK. Prof. Harald Haas is also known as the founder of Li-Fi technology. He had represented his Invention in Tech Talk. Herald Haas is the co-founder of Pure Li-Fi. From his thinking, today we can use Li-Fi technology.

According to Harald Haas, if any information is sent through the Visible Light Portion, then it is called Visible Light Communication (VLC). Harald Haas started a D-Light project from 2010 to 2012, when he was in Edinburgh's Institute for a lot of time. After spending a lot of time on this project, during 2011 TED Global Talk had demonstrated Li-Fi Technology to the public. After this, people started to know about this technology. At the same time, a company was started without losing a time, whose name was PureLiFI which is still now.

PureLiFi first name was Pure VLC, which was an original equipment maker (OEM) company. To increase PureLiFi business, the company started working on existing LED lighting.

In October 2011, the company had formed the Groups of Industries and Li-Fi Consortium. Both of them had the same motive to create a high-speed wireless system. Finishing the limitations in the Radio Waves There were many companies that started making Uni-Directional VLC Products but it was quite different from Li-Fi.

In 2012, VLC technology was introduced with Li-Fi. It was proven in a presentation on August 2013. There was Data Transmission with Single Color LED 1.6 GBPS in it. In a Press of 2013, it was said that there is no requirement of Line of Sight in Li-Fi. In a report of October 2013, it was reported that Chinese Manufacturers have engaged Li-Fi kit in development.

In April 2014, Russian company Stins Coman developed a wireless network named Beam Caster. At present, data speed is around 1.25 Gigabytes per second. In the future, Li-Fi's speed is going to be 5 GBPS. This was the short history of the Li-Fi. You've probably liked it.

Differences in Wi-Fi and Li-Fi

  1. Different differences are found in Wi-Fi and Li-Fi based on their actions and capabilities. We are telling you further about it:
  2. Data transmission is done through Lights in Li-Fi, and Wi-Fi has data transmission through radio waves.
  3. Because Lights do not go on the other side, so the Li-Fi network remains secure. The Wi-Fi network is not secure due to being open.
  4. Li-Fi is a Led Bulb device and a Wi-Fi Wireless Router.
  5. Data transfer speed of Li-Fi is 1 GBPS and Wi-Fi has a data transfer speed of 150 MBPS.
  6. Li-Fi can do a distance range of up to 10 meters. Wi-Fi relies on 32 meters (WLAN 802.11b/11g) and transmission power and antenna.

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  1. Efficiency: You must know this technology is based on Visible Light Technology. As you know, there are already using LED bulbs in the office and home. LED bulbs are good sources of light. For this reason, they can be used for data transmission. It is a cheap and good source of light. It is mandatory to turn on the LED bulb during Data Transmission. If you are having trouble with light then you can reduce the light of the LED bulb and still you can use the internet.
  2. Availability: There is the internet where there is Light Source. You can see Light Bulb everywhere, such as in homes, offices, shops, malls, and planes too. You have the same foresight to speak. You can use Li-Fi where there is a lighting system.
  3. Security: One of the advantages of this Technology is Security. As you know Light cannot cross the wall. Similarly, Li-Fi's signal is also due to not going from one room to another room. Any user of the outside cannot access your Internet.


  1. Without a light source, you can not access the internet. There is a need to turn on the light every time.
  2. It can be used within a room only.
  3. Due to being a light, it can not distinguish the wall. This is why the Internet is available on a limited location.
  4. There is a possibility of hindering internet speed due to Sunlight.
  5. The new Li-Fi connection has to be created separately for the network.
  6. It is quite expensive technology.

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Through today's post, you know what Li-Fi is and with this, you got to know the difference between Wi-Fi and Li-Fi. Hope that the information given by us will be useful to you.

You can also share this post information with your friends, and share this post on social media. So, more people can access this information. If you have any problems with this post or you have any questions related to this post, then you can ask by commenting in the comment box.
What is Li-Fi and how does it work? What is Li-Fi and how does it work? Reviewed by Kanu Ray on Friday, June 28, 2019 Rating: 5

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