Imagine the lamp’s light of your bedroom is providing an ultra-high speed wireless network with illumination! Yes, with Li-Fi (Light Fidelity) it is very much possible. If you are frustrated with your slow Wi-Fi connection, you might be one of the people who are looking for the commercialisation of Li-Fi, which can provide up to 100× faster network than Wi-Fi.

What is LiFi?

Li-Fi is a high-speed wireless network technology which uses the LEDs (Light Emitting Diodes) as visible light transmitters using VLC (Visible Light Communication) system. In short, Li-Fi works as the Wi-Fi (Wireless Fidelity) using visible light as the carrier instead of Radio Frequency (RF) to transmit data.

As the figure displaying:

-The LED driver is connected with the internet; it has embedded signal processing technology.

-The LEDs are streaming the data through visible light.

-The VLC driver works by switching the current to the LEDs off and on at a very high rate; it is too quick to be noticed by the human eye.

-The photo detector on the other hand working as a transducer; receiving and converting the light into electrical signal.

-There is a processor to amplify the amplitude, decode and decrypt the data in the Li-Fi dongle.

-The Li-Fi dongle can be connected with your laptop, mobile or any such device.

Advantages of LiFi over WiFi?

  • Li-Fi uses visible light, whereas Wi-Fi uses the radio wave. That’s why Li-Fi is extremely useful in such areas which are sensitive to electromagnetic signal. Such as, nuclear power plants, weapon manufacturing plants, aircraft, hospitals etc.
  • Wi-Fi has a limited spectrum capacity, whereas the Li-Fi has almost no limitation on capacity.
  • The visible light spectrum is 10,000 times larger than the entire RF (Radio Frequency) spectrum.
  • The Wi-Fi can provide maximum net data rate from 54 Mbit/s to 600 Mbit/s, whereas the Li-Fi can provide over 224Gbit/s (tasted).
  • Though Wi-Fi RF can penetrate the wall and provides a wide range of network coverage, nevertheless it is less secure than the Li-Fi signal which cannot penetrate into the wall and giving a very secure internet.
  • Li-Fi doesn’t have any inference issue as Wi-Fi has.
  • RF has some bad effects on human health, but visible light doesn’t have any effect on human body.

Disadvantages of Li-Fi

  • Li-Fi has a shorter range than Wi-Fi, coverage is limited under the walls.
  • Li-Fi installation cost is very high, though the maintenance cost is very less.
  • It is not as reliable as Wi-Fi.
  • Li-Fi is not as portable as Wi-Fi.

Li-Fi Kit:

OLEDCOMM and pureLiFi are the world leaders in Li-Fi products which includes Li-Fi routers, Li-Fi hubs, LED drivers, LED lamps and complete kit for lighting system.

Also Casio, Panasonic have a wide range of Li-Fi devices.

Aslo read, what is 5G?

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