[Text / high-tech LED Xu Chaopeng] LiFi (Light Fidelity) technology with the "open a light, go online", once let the science fiction writer Han Song also exclaimed, "This is not a science fiction, but it is better than a science fiction." Recently, LiFi has been limited to the academic field. After receiving strong attention from the outside world, some people even think that LiFi will replace WiFi.
Recently, the National 863 Program, led by the People's Liberation Army Information Engineering University, and Zhengzhou City's major special project "Research and Application of Key Technologies for Visible Light Communication Systems" have made major breakthroughs, increasing the real-time communication rate of visible light to 50 Gbps, which is the highest internationally reported. 5 times the level, equivalent to 0.2 seconds to download a high-definition movie.
"Visible light communication technology, in popular terms, can realize communication, monitoring and positioning in places where there is light. Its secret lies in LED light bulbs. Unlike ordinary fluorescent lamps and incandescent lamps, LED lamps can be quickly extinguished, and the frequency of flashing is extremely high. Gao, so that he can undertake the task of sending information." Professor Zhang Jian, deputy director of the visible light communication laboratory of the PLA Information Engineering University, said.
According to Professor Zhang Jian, at present, there are about 44 billion lamps and lanterns in the world, and the integration of tens of billions of LED lighting devices with other devices will constitute a huge visible light communication network.
"Imagine that if you realize large-scale visible light communication in the future, each light can be used as a high-speed network hotspot. People can download movies under the street lights, and high-speed Internet access can be achieved by using LED light sources on airplanes and high-speed rails." Here, Professor Zhang Jian is already excited.
According to the research of the High-tech Research Institute LED Research Institute (GGII), as of the end of 2015, there have been more than 4,400 published patent applications related to visible light communication technology. However, enterprises and institutions are still in the research stage, and LiFi is still in use. In fact, the products produced in large scale have not yet appeared.
"At present, China's visible light communication technology is mainly concentrated in the Pearl River Delta, the Yangtze River Delta, the number of patent applications is relatively large, the relatively concentrated universities in Beijing, Wuhan, Shanghai and other regions, the visible light communication patents also have a certain distribution. But compared to the Yangtze River Delta Shanghai, Jiangsu In Zhejiang and other regions, the distribution pattern of the intensive and fragmented areas, the distribution of patents in Guangdong is relatively concentrated, the number of patent applications is relatively large, and the patent applications are concentrated in Beijing, Shanghai, Jiangsu and Guangdong.†GGII Senior Analyst Li Hair growth said.
"At present, apart from universities and research institutions, enterprises in Shenzhen have begun to have patent layouts in the field of visible light communication technology. For example, ZTE has 6 patent applications in the field of visible light communication technology. In addition to domestic and patent applications, Huawei There are also five patents for visible light communication in the United States and the European Union," said a senior in the industry.
The author understands that many applicants for visible light communication patents are currently communication companies, and LED companies are relatively less concerned in this regard. As a gathering place for LED enterprises and also a global innovation workshop, Shenzhen should pay attention to and participate in the technology. For example, how to solve the problems of LED devices and chips used in visible light communication technology must have important functions and guiding significance. High-tech LED is also looking forward to further outbreaks in this market, we will continue to pay attention!
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