German physicist Harald Haas "lit up" his fantastic idea with the light bulb itself: relying on a small lamp to turn invisible network signals into "seeing" "See" network signal. Haas and his team at the University of Edinburgh in the UK have recently invented a patented technology that uses flashing lights to transmit digital information. This process is called visible light communication (VLC), and people often refer to it affectionately as "Lifi". To show that it can bring revolutionary changes to wireless network transmission technology represented by WiFi. [2]
German physicist Harald Haas mentioned in his TED talk "Providing wireless signals with every light bulb" that current radio signal transmission equipment has many limitations. They are rare, Expensive, but inefficient, such as mobile phones, millions of base stations around the world help strengthen their signals, but most of the energy is consumed in cooling, and the efficiency is only 5. In contrast, the light bulbs used around the world are inexhaustible. , especially in China, LED light sources are replacing traditional incandescent lamps on a large scale. Just adding a microchip to any inconspicuous LED light bulb can turn the light bulb into a wireless network transmitter.
October 2013. On the 15th, good news came from the School of Information at Fudan University. An international cutting-edge communication technology that uses visible light to transmit network signals in the room was successfully implemented in the laboratory. Researchers connected the network signal to a 1W LED lamp bead, and the light was 4. You can access the Internet from any computer, with a maximum speed of 3.25G and an average Internet speed of 150M, making it the fastest "light Internet" in the world [1]