Receiving music or videos on a tablet, a computer or a smartphone, without an internet connection, wi-fi or 3G , but only through the light of a lamp, that's what the Li-Fi technology allows. This technology has existed for several years, it's a technique that uses light sources like a morse code to transmit binary code to a receiver.
But now a group of researchers based in the UK have been able to achieve a transfer rate of 10 gigabit/s record, ten times faster than the fastest fiber optic connections of Google. Such speeds were made possible by the use of micro LED that flashes quickly to communicate in binary code. Researchers have associated red, green and blue LEDs to recreate a white light and increase the amount of information transferred simultaneously.
The technology could replace the wireless Internet connections communicating through radio waves, it has its advantages as well as drawbacks. First of all the connection depends on the amount of light that passes from the LED to a receiver, but still does not require a direct line of sight. You can bounce the signal using mirrors, or even simple walls. Drawback, the connection can not pass through walls or opaque materials. It seeks to create secured areas or limited access.
