Li-Fi History

    Li-Fi was created in 1997 and created by Harald Haas. Li-Fi has shown that it's 100 times faster than Wi-Fi. In October 2011, companies and industry groups formed the Li-Fi consortium, to promote high-speed optical wireless system and to overcome the limited amount of radio-based wireless spectrum available by exploiting a completely different part of the electromagnetic spectrum. By August 2013, data rates of over 1.6 gbit/s were demonstrated over a single color LED. in 2013, a press release said that Li-Fi,or VLC systems in general, do not require line-of-sight conditions. In October 2013, it was reported Chinese manufacturers were working on Li-Fi development kits.

    How does Li-Fi works, it works by an Estonian startup called Velmenni used a Li-Fi-enable light bulb

to transmit data at speeds as fast as 1 gigabit per second, which is about 100

times faster than current Wi-Fi technology, meaning a high-definition film could be downloaded within seconds. Li-Fi refers to visible light communication (VLC) technology, which delivers high-speeds, bidirectional, networked mobile communication in manner similar to Wi-Fi. When a constant current is applied to an LED [light-emitting-diode] light bulb, a constant stream of photons are emitted from the bulb which is observed as visible light. If the current is varied slowly, the output intensity of the light dims up and down. Another major issue is that Li-Fi does not work outdoors, meaning that public Li-Fi will not be able to replace public Wi-Fi networks any time soon.

    Who discovered Li-Fi , who teaches at the University of Edinburgh in the UK, coined the term "Li-Fi" at his TED Global Talk where he introduced the idea of "Wireless data from every light". He is Chair of Mobile Communications at the University of Edinburgh and co-founder of pure LiFi. Haas demonstrated that he could transmit more data than a cellular tower by flickering light from a single LED, according to Science Alert. Haas has long been studying ways to communicate electronic data signals, designing modulation techniques that pack more data onto existing networks.His main research interests are in optical wireless communications, hybrid optical wireless and RF communications, spatial modulation, and interference coordination in wireless network.