This is one of those news that makes us the hair stand like hooks, and could not miss much that we go to our domestic networks simply by turning on the light in the room. Professor Harald Haas, of the University of Edinburgh, just to show to the public the first LiFi device of data transmission.
What is this about the LiFi? Though it may be strange, the transmission of data using light or VLC (Visible Light Communications) It is a technology that has been investigating for more than 100 years. The footballer Graham Bell already developed a device called photophone, which managed to transmit sound using a ray of light.
Principles of the VLC-based broadcast data by altering the frequency of the visible light between 400 and 800 Thz. The data reaches a photoreceptor that is responsible for interpreting them. In the absence of specific photoreceptor, reception could improvise through any electronic eye as a webcam or a mobile camera.
Speed of 10 Kbps using fluorescent lamps, had been made so far but the arrival of the LED It gave a sudden boost to the development of VLC technology. LEDs are more powerful and can be manipulated in a more agile manner. During the demonstration, which took place last week in the Edinburgh TEDGlobal Conference, Professor Haas sent a 10-Mbps with a single video signal LED bulb. Haas said he is ready to increase the speed of transmission to the 500Mbps (supposedly the physical limit of this technology) before end of year.
LiFi networks have many advantages. The first is that they are completely invaluable to the human eye and any suspicion of producing disease-free in living things further than bothering to take the NAP. On the other hand, they are a great alternative for the future for the increasingly saturated frequency spectrum. The presence of lights in almost every corner of the civilized world guarantee thousands of promising practical applications. Just imagine cars able to communicate with each other through headlights or streetlights issued by internet connection.
On the negative side, its range is very short the transmission automatically cuts (five meters) and anything that comes between transmitter and receiver. Be that as it may, the LiFi could be ideal to develop wireless routers and their problem with obstacles It can be also seen as an advantage that the signal would never come out of the room. At most would have to start coining new colloquial phrases such as: ‘, get in the Middle, which I covers the LiFi & #8217;.
At the end of last year, the company’s audio Klipsch already developed a commercial LiFi receiver for wireless speakers. The future has never had so much light.