Dr. Anagnostis Paraskevopoulos explained:



"The fundamentals of visible light communication (VLC) were developed together with the industry partners Siemens and France Telecom



For VLC the sources of light – in this case, white-light LEDs – provide lighting for the room at the same time they transfer information. With the aid of a special component, the modulator, we turn the LEDs off and on in very rapid succession and transfer the information as ones and zeros. The modulation of the light is imperceptible to the human eye.



A simple photo diode on the laptop acts as a receiver. The diode catches the light, electronics decode the information and translate it into electrical impulses, meaning the language of the computer." "The fundamentals of visible light communication (VLC) were developed together with the industry partners Siemens and France Telecom Orange Labs. [It] means that we [can transfer] four videos in HD quality to four different laptops at the same time.For VLC the sources of light – in this case, white-light LEDs – provide lighting for the room at the same time they transfer information. With the aid of a special component, the modulator, we turn the LEDs off and on in very rapid succession and transfer the information as ones and zeros. The modulation of the light is imperceptible to the human eye.A simple photo diode on the laptop acts as a receiver. The diode catches the light, electronics decode the information and translate it into electrical impulses, meaning the language of the computer."

German scientists working at the Fraunhofer Institute for Telecommunications ) inhave succeeded in developing an(Megabits per second) capable wireless network () by using nothing more than normal red, blue, green and white) light bulbs.It apparently only takes "" to turn regular LEDs, which these days can be found in everything from Torches to Christmas tree lights, into anThe LEDs, which are placed on the ceiling and have a, essentially blink on and off extremely fast to transmit the data. This signal can then be picked up by a receiver, which is typically placed anywhere within the coverage radius.The technology could prove to beor are prevented from use, such as inor on. However it's by no means perfect.Sadly visible light like this cannot penetrate through walls and is easily blocked (e.g. somebody walking in front of the LED source). As a result the scientists admit that such a solution would be unlikely to replace your home wireless network anytime soon, although you can never say for sure.At present the 800Mbps figure is known to be afor VLC technology and was developed as part of the EU's wider OMEGA Home Gigabit Access project to improve home networking performance.