Li-Fi Technology

Li-Fi

    Li-Fi (Light Fidelity) technology was coined by professor Harold Hass. Li-Fi technology is a high speed and fully networked wireless communication technology. The concept of using light as a medium to transfer internet data is coined as Li-Fi. Li-Fi can provide data transmission which is 100 times faster than Wi-Fi.

Li-Fi

Advantages of Li-Fi

        Li-Fi is cheap, safe, plentiful, robust for data transfer. Wi-Fi uses radio signals to transmit data whereas Li-Fi uses visible light rays to transmit data. Light rays has more capacity to transmit most amount of data in a less time compared to radio waves. 

       Li-Fi Researchers have recorded a speed of 10GBPS in laboratory.  The researchers of Oxford University have reached 224 gigabytes per second using the Li-Fi technology. Technically it would allow you to download 18 movies of 1.5 GB in 1second.

     Normally your Wi-Fi signals penetrate through walls and can be easily picked by malicious user that means data flows out of your living room. In Li-Fi technology signals can’t penetrate through the walls offering a high degree of privacy from the malicious user who wants to snoop on your PC. 

     Then your next question might be do the lights need to be turned on every time? Probably the answer is Yes, the light has to be turned on whenever you want to use data, but the lights the can be dimmed down that the human eye cannot detect whether it’s on, but still the receiver receives the data.

Working of Li-Fi

   

      Wi-Fi uses radio signals to transmit data but Li-Fi is a visible light communication system. Ceiling LED fixture encodes data from internet and decodes into light. The LED light bulbs are semi conducting light source that electricity supplied can be dipped and dimmed down at higher rates which is invisible to human eyes.

          The data is fed into LED bulbs it then sends data at rapid speed to photo detector. Light received by photon detector which converts the variation of intensity of light into electrical charges. These electrical charges are then converted into binary data and then they are sent to Computer, mobile phones, etc. For more explanation watch this video.