A lamp connected to the world: LED visible light communication system

Light can be illuminated, but also can transmit data and images, using the Internet, is no longer a sci-fi movie plot! In support of Chinese Taiwan Ministry of economic affairs, ITRI developed "LED visible light communication system", the visible light communication module device in LED lighting, LED lighting through the transmission capacity, transmission distance of about 3 meters per second can reach about 100Mbps, let LED lamp has the characters of both energy-efficient lighting and intelligent communication. Provide location management of broadband Internet, indoor navigation, service personnel. And the mobile phone, but also help store location services and other business applications, not only make LED lighting industry Deep-Fried Chicken with Chili Pepper, is also the next generation wireless communication star!

At present, the visible light communication system is mainly used for low power consumption, long life of LED lamp, and through the visible light to transmit data. So in addition to the transmitter will be communication network and the LED lamp link, and the data after conversion with visible light transmitted, and set the visible light receiver at the receiving end will, for receiving the interpretation of the data is transferred to a computer or mobile phone and other information equipment. If there is a need to upload data, you can see the application of the field situation, the use of infrared, Wi-Fi or increase the visible light devices such as transmission.

This system integrates communication and lighting, make communication transmission data can have new spectrum; visible spectrum and different from the electromagnetic wave, not only does not need the expensive spectrum authorization (License-Free), but not with existing Wi-Fi, Zigbee, Bluetooth communication technology using the same frequency band, avoid mutual interference, even on the human body also harmless, more suitable for use in hospitals, aircraft is more susceptible to the effects of electromagnetic waves in the field.

Institute of information and communications research developed by the visible light communication system, mainly adopts LED lamps of low power consumption, long service life, and to transmit data through the visible light emitted.

The Institute of information and communications research developed by the visible light communication system, mainly adopts LED lamps of low power consumption, long service life, and to transmit data through the visible light emitted. (Source: decryption technology treasure)

In addition, because through visible light transmission data, plus the LED light with a directivity, a light angle, as long as the receiving end of a left light range, or LED visible light is covered, will immediately cut off, suspend the transmission, unlike Wi-Fi communication technology can be used in wide area. Visible light communication system has the characteristics of information and network security, can be used for confidential conference room communication systems, etc.. At the same time, because of the limited range of lighting LED, as long as the light can effectively identify the location, but also can be used as an accurate indoor positioning tools.

A variety of characteristics of this technology, can bring a wide range of applications. For example, to improve the efficiency of the staff in the restaurant, so as to serve the nearest needs of the guests, or to ensure that the building security personnel at all important locations have inspections, etc.. In all kinds of shops and stores, you can also use the visible light communication system to send goods offers or promotional information, consumers can receive messages only through the phone. The demonstration in the decryption of the treasure of science and technology, cleverly to five degrees of communication channels alternative display.

Other more specific application fields, including the use of water in the signal transmission, so that the divers can pass through the light to transmit messages such as voice, water navigation, but also improve security. Or for the sea condition monitoring, water engineering construction, also can first image data storage, and then sent unmanned underwater vehicles will be collected back, then you can through visible light transmission, and reduce the cost of network deployment line.

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