Scottish company PureVLC preparing a revolution in the area of wireless digital communications. Their technology is Li-Fi, which is used to communicate the light, can replace the traditional transmission via radio frequencies (Wi-Fi).
As stated on the company's website, their development can be networked multiple devices without sacrificing performance and provides wireless speeds of up to 130 megabits per second.
As a transmitter in this system are the LEDs that are so rapidly changing the intensity of light that the human eye does not notice these fluctuations. But encoded binary signal blinking easily recognize special optical sensors installed on computers or mobile devices.
"LEDs are electronic devices that can be switched on and off very quickly, — says CEO Harald Haas (Harald Haas), who is also a professor at the University of Edinburgh (University of Edinburgh). — Flashing light project data in the form of" zero "and" unit "a very high speed, and transmits them to the photo-detectors."
Note that it was not a very fast turn-off of light intensity changes are small.
Haas first demonstrated the technology in 2011. Then he gave the video to the computer using a table lamp. In this case, when he closed the light hand, the video stream stopped.
Now researchers are developing special devices that can transform an ordinary room light in the Li-Fi network.
According to scientists, the transmission of information via Wi-Fi is inconvenient fact that the location of the source signal in the next room, the quality of the connection and the speed reduced. Moreover, in places such as hotels and restaurants, many connected to the network devices, bandwidth is also falling.
When using Li-Fi no such problems. Special equipment synchronizes lighting in all areas to a single oscillation frequency. The number of users is almost unlimited.
The only significant disadvantage of the invention is that the system requires line of sight between the light source and the receiver.
In the future, the developers plan to increase the speed of data transmission over Li-Fi up to one gigabit per second. Haas believes that the new technology can be used on a larger scale, for example, to communicate with the satellites.
Category: Scientists, experts, science