How does Li-fi work?

Li-Fi – a wireless technology that transmits high-speed data using VLC, visible light communication.  Current tests show speeds of 224 gigabits per second in the lab.

Li-Fi was invented by Harald Haas from the University of Edinburgh, Scotland back in 2011, when he demonstrated for the first time that by flickering the light from a single LED, he could transmit far more data than a cellular tower.

The light is between 400 and 800 terahertz (THz) and flashing at extreme speeds to transmit in binary code. The LED flash at speeds imperceptible to the naked eye.

“All we need to do is fit a small microchip to every potential illumination device and this would then combine two basic functionalities: illumination and wireless data transmission,” Haas said. “In the future we will not only have 14 billion light bulbs, we may have 14 billion Li-Fis deployed worldwide for a cleaner, greener, and even brighter future.”  — Harrel Haas (inventor) Ted talks

 

Eddie Dounn

Web developer by day. Enthusiast by night. Owner of VAZED

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