ITRI station technology developed LED visible light communication, visible light communication module means on the led lamps, provide about 60 Mbps transmission capacity of the transmitted light illumination to provide a high-definition video viewing like broadband Internet services, so that led lights With the characteristics of energy-saving lighting and intelligent communication, it can achieve indoor positioning function, provide indoor navigation, service personnel location management, and mobile phone to achieve commercial positioning services such as store positioning services.
According to Zhai Zhike, director of the Institute of Industrial Technology, the LED has gradually become the most important lighting fixture in the room due to its energy-saving advantages and long service life. Compared with traditional incandescent lamps and fluorescent lamps, the LED bandwidth can provide a transmission rate of about 60 Mbps, so the visible light communication technology using LEDs to provide broadband Internet access has also rapidly emerged in the past 12 years.
Since the LED is a necessary indoor lighting fixture, it only needs to install a visible light communication module to provide Internet access, and the LED lighting frequency band does not need expensive spectrum license (License Free), and has cost-effective advantages, as long as there are LED lights in the future, You can achieve the function of networking. In addition, LED does not have electromagnetic interference effect, so LED visible light communication can be used in special environments such as hospitals and airports, and because the angle and scope of illumination have limitations, the transmission signal is not penetrating, so it is suitable for conference room communication that requires confidentiality. Low electromagnetic waves, such as hospitals and airports.
Zheng Shengqing, deputy director of the Institute of Industry and Technology of Taiwan Institute of Technology, said that the Taiwan Institute of Technology has invested in LED visible light communication technology research and development for more than three years. At present, this technology is close to the product stage, and has been transferred to Taiwan Netcom manufacturers. In addition, the visible light band penetration in the sea is several times higher than the general RF frequency band. In the future, it is also suitable for underwater high-speed wireless communication. The Institute of Technology has combined this application with a diving mask and passed the led flashlight in the water. The diver can talk through visible light instead of the traditional sign language or tablet, which makes the diver communication more convenient.
In order to make the LED visible light communication application more widely, the Taiwan Institute of Technology has also begun to minimize the visible light communication module into a wearable module and develop a visible light communication mobile phone application APP, so that the general smart handheld device can also receive visible light communication signals. Provide applications such as positioning, punching, and multimedia information reception at booths.
Zheng Shengqing also pointed out that the Taiwan Institute of Technology has further developed a visible light precision indoor positioning algorithm to overcome the problem of interference between multiple LED lights, and to improve the accuracy of visible light indoor positioning to within 20 cm. In the future, it can also be applied to store shopping. Customers can enjoy indoor positioning tours to find specific products. The store can also launch an active product information push service for products. When the customer is close to the product, the visible light communication mobile phone can accurately locate and automatically detect and automatically receive information about the product, thereby improving the convenience of shopping and visiting the store. rate.
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