LED optical internet light creates the future of the network
When the development of technology has brought human social life into the digital age, the " LED optical Internet" called LI-FI has become the hottest topic at the moment. "LED light can also access the Internet? Is it not a lighting tool?" Many netizens have responded after hearing the "LED light Internet" for the first time.
"In fact, since the birth of the LED concept, its technological breakthroughs have emerged in an endless stream," said Ren Zhi, chief designer of Beijing Zhimei Lighting. "Although LED is an energy-saving lighting method, it has been deeply integrated into our lives. But with With the continuous development of technology, it is only a matter of time before LED becomes the focus of new fields."
"LED light Internet access" means that the laptop can receive the network signal when it is placed in the light emitted by the LED light. Its working principle is the same as the infrared transmission method commonly used in people's mobile phones (later gradually replaced by Bluetooth). A typical optical network application. Professors from Fudan University said that light and radio waves are all one kind of electromagnetic waves, and the basic principles of transmitting network signals are consistent. As long as the ordinary LED bulb is equipped with a microchip, the LED can be controlled for millions of flashes per second. After the photosensor receives these changes, the binary data is quickly encoded into a light signal and transmitted efficiently. The computer under the light can access the Internet through a set of special receiving devices and read the "Morse password" in the light.
This magical Internet mode has caused many netizens to call "LED cool"! In fact, the charm of LED light Internet is more than cool, its various advantages are summarized as "low radiation, low energy consumption, high security, high speed."
According to relevant experts: Traditional wireless transmission technologies are mostly transmitted in the form of electromagnetic waves, which brings a lot of electromagnetic radiation and electromagnetic interference. These usually affect the work of the human body and high-precision equipment. LED light sources have a natural advantage in this regard. At the same time, due to the combination of optical signals and communication signals, the threat of double radiation is eliminated.
In addition, the routing and power consumption of wireless routing and wireless hotspots is also huge data. The LED optical network transmits the network signal through visible light, and can directly use the existing energy consumption output such as street light, indoor lighting and public lighting to complete the dual task, which is definitely a new breakthrough of green low consumption. And, compared to existing Wi-Fi, future visible light communication is safer and faster. Since the WI-FI wireless signal is transmitted through the atmospheric medium, the "floating" network information outside is extremely unsafe. These security risks can be swept away in visible light communication. Also, the spectrum is 10,000 times larger than the radio spectrum, meaning greater bandwidth and higher speed.
Therefore, when LED lighting is popular, there will be a network where there is lighting. However, the existence of things has always been two-sided. While the Internet has various advantages, its limitations have to be taken seriously. For example, if the light is blocked, the network signal will be cut off, and the optical wireless communication is limited by the transmitted energy, and it is impossible to transmit too far.
When the relevant experts mentioned the promotion of LI-FI technology, they also expressed their own concerns. In order to truly apply the LI-FI technology for mass production, the two-way transmission of data and the reform of the chip in front of them need to be solved. Therefore, the promotion of LED lighting technology, just as Ren Any said, may have to rely on the application in a certain field, and Li-Fi has a long way to go to truly popularize.
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