Seconds to download a movie with LED LiFi lamps have a brilliant future

China in the network, in addition to LED lamp lighting, can also realize the communication, namely the establishment of reverse information transmission channel to upload information. Similarly, as long as the LED lights for lighting installed at the same time to polish / electric converter, the receiving computer (built-in LED lamp) can emit the light signal. As a result, the LED lamp lighting at the same time, also played the role of a wireless router, plays a dual role of lighting and communication.

The Internet with LiFi, 1 second to download a movie

Visible light communication is proposed in 1999 by a China scholar at University of Hong Kong, in recent years in the study of Britain, Germany and the United States and the China has been a breakthrough.

In 2011, Britain will refresh the communication rate of LiFi to 10G, the Internet with this rate, download a 1G capacity movie takes less than a second time, the speed far beyond people's imagination. In September 2013, Fudan University, a LiFi prototype test, through a 1 watt LED lamp access network signal, under the light of the 4 computer can get online at the same time, the communication speed can reach 3.75G, the average net rate reached 150M, the speed has reached a new height. In January 2014, a French company demonstrates a LiFi intelligent mobile phone, it is converted to a light sensor through the front camera, with LED light receiving signal, the average internet rate is 10M, is expected to two years can achieve industrialization. In October 2014, the United States has developed a fast LED light, emitting 1000 times faster, can greatly enhance the communication rate of LiFi.

According to media reports, January 7th, Fudan University signed a business agreement settled, the LiFi project will open the process of industrialization. In addition, according to foreign media reports, announced the acquisition of $15 million of new investment in the UK pure Lifi venture company before, to support the development of LiFi network Li-Flame system, it can make the LED lamp ready to LiFi access point, to complete the bidirectional data transmission function -- "with Li-Flame, LED will be able to see the light the internet".

LiFi what are the advantages of the Internet

LiFi from the first proposed to industrialization, only for ten years. The main reason is that compared with other optical communication and radio communication, there are many outstanding advantages.

Rich spectrum resources. The electromagnetic spectrum communication overload phenomenon is very serious, and the frequency range of visible light and band width than the radio spectrum, the spectrum resource is very rich. Therefore, the use of LiFi will greatly reduce the use of the radio spectrum pressure.

Ultra fast transmission rate. Many people have such experience: sure Home Internet broadband access up to 8~12M, but the Internet speed is not fast, watch the video or download large files often card, if using a wireless router forwarding time, Internet Wi Fi signal, the card will be more. Visible light itself is very wide bandwidth, higher transmission rate means. Moreover, the laboratory has launched the product show that LiFi can achieve an easy job to do transmission rate of more than 100M, the future in practical application is likely to reach more than 1G, so the Internet speed, you have to worry about the card?

Harmless and safe communication. Many of the home installed Wi Fi people have this habit: every night before going to sleep always remember to turn off the wireless network, the wireless signal that is harmful to the human body. LiFi signal in visible frequency range, is a common light, basic harmless to humans, but little power consumption, can be said to be "green communication". In addition, the visible light can not penetrate the objects in the laboratory using LiFi, after drawing the curtains, the LiFi signal can not give out the window, nor "through", don't have to worry about someone break your Wi Fi password, sharing your home wireless network.

Convenient and efficient. LiFi mainly through the implementation of LED lights, using power line ready, do not need to lay special signal lines, and quick installation, can be placed in any indoor place, lights lighting at the same time can transmit signals, power consumption is less than the luminous power of 5%, less than half the estimated cost of fiber broadband, but also in the scope of human adaptation the adjustment of lighting power can be said that best meet the communication needs, convenient and efficient.

A military LiFi

Although LiFi is still in development, has not yet formed commercial products and realize the industrialization, but it shows outstanding advantages, can play a significant role in military applications.

Underwater communication detection

The underwater electromagnetic wave propagation distance is very near, complete underwater communication and detection is very difficult. In early 60s, people found that the spread of seawater on the blue-green light effect is much smaller, can be used as a transmission window under water, to solve the electromagnetic wave underwater communication and detection problem. The emergence of LiFi electromagnetic wave underwater transmission is a new choice, the use of blue and green LED lamp. The underwater communication or detection system, may accelerate the realization of people for a long time for electromagnetic wave underwater communication and detection of the dream, and to a fast communication, submarine communication and water underwater target detection provides efficient means of communication.

A special place for communication

Similar to civilian areas, in the field hospital operation room, aircraft and ships and other places, in order to prevent the RF signal interference, generally do not allow the use of radio equipment. Special places and weapons and ammunition and missile silos and confidentiality requirements, also prohibit carrying radio equipment. As a result, the limited communication on these occasions, can not meet the needs of the task. After the LiFi, just put the LED lamp or other special places to access satellite communication network,