For a wide range of areas of visible light communications demand for Olympic Games

The Nikkei technology online news show recently, visible light communication technology "Japan visible light communication International Conference & Exhibition 2015" on October 26th at Keio University in Japan on campus at kyrgyzstan. This is the first international conference and Exhibition on the theme of visible light communication. The exhibition is mainly introduced in (1) will be used as a mobile phone smart camera digital signage receiver (sign) and (2) identify the use of high-performance camera drones and other aspects of technology development progress.

Visible light communication 10 years ago has been of concern, but there was no application example. But the Japanese visible light communication association, Keio University professor emeritus Nakagawa Jungxiong said, "the last two years, visible light communication attention once again began to appear some practical examples". Equipped with "camera", "application software" and "wireless communication" these three elements of the popularity of smart phones is the primary reason. In fact, there are several practical examples in the use of digital signage (1). The exhibition on display at the Tokyo International Exhibition Hall decided in the spring of 2016 the introduction of the development of the "light Matsushita ID service solutions, and has reached the practical level developed by Fujitsu (the beginning of experiment 2015 year)" to connect the physical and information LED lighting technology ". Because of the visible light communication can send ID and URL, therefore, a variety of advertising by making intelligent mobile phone alignment camera (poster), you can use AR (augmented reality) technology to provide multi language information, can also be used in visible light communication switching between text and speech information barrier free display. Therefore, for the 2020 Tokyo Olympic Games, the demand for visible light communication is expected to expand.

Panasonic "optical ID service solution". Can be based on the blink of 10kHz, the interval of a few seconds to read 32 or 120 bit data. By using the characteristics of the smart phone camera (photosensitive element) to read the image through the horizontal line, the light source is read by reading the time difference between the 1 images. Commercially available HD class photosensitive elements can be used.

Fujitsu's "connecting the physical and information LED lighting technology" is to shoot the light to the kind of information can be read ID technology. The irradiation light (light source is located in the lower right corner of the figure) in the direction of the color pattern in time allocated binary information. The technology is characterized by strong anti noise, even in the low frequency of less than 10Hz, it is not easy to be recognized by the naked eye. This technology has been in the "Japanet Takata" online shopping channel dedicated to the realization of the TV image practical, for LED lighting applications. The technology needs to be able to change the color of the RGB full color lighting device, the goal is to have the lighting of the above stage lighting and building lighting and other practical.

Can be used to monitor the state of the plant

He pointed out that "the ordinary camera as the receiver, can obtain a space position information of individual identification and other information, which is the visible light communication has attracted much attention because of the". If you use a fixed camera, such as surveillance cameras, you can confirm the location of the object through the image itself, through the visible light communication to confirm the information. "Even moving objects and two objects that overlap with each other often can be identified and not interfered by the radio". In the conference, the NTT Institute of Communications Science Foundation introduced the use of visible light communication in the stadium and nursery management user heart rate method. The user with the LED light source, send the heart rate information, using a fixed camera to confirm. Users do not specify their location, the monitoring side can be a one-time grasp of each user's location and heart rate.

He said, "the visible light communication can also be used for unmanned aerial vehicle license, only need to install the LED in the vehicle, monitoring management in monitoring machine at the same time". The subject of such applications is how to keep up with the speed of the mobile light source (sender). At the exhibition, NEC engineering company demonstrated the speed of about 4 seconds for the 50cm/ light source to monitor the "visible light communication high speed camera". The company in the horizontal 640 pixel * vertical 100 pixels, 1500 frames / sec camera equipped with a 750bps speed parallel processing of the hardware, almost uninterrupted display of ID and real-time information. CASIO computer is the use of the company's development of the use of 3 kinds of color visible light communication technology "picalico" carried out UAV surveillance demo. The demo uses a 60 frame / sec camera and a computer, and when the vehicle suddenly moves, there is a ID display interrupt. In addition, CASIO computer also shows the use of visible light communication device in the manufacture of "light" on the state of technology, specifically, if not laying down the network, as long as the usual indicator for indicating lamp support for visible light communication, can use the camera to get the error information, including the ID, you can monitor the factory in the state.

NEC Engineering "visible light communication high speed receiving camera" (top left). The demonstration, read a total of 4 light source and the rotary table top metronome (upper right) information (below). Can read up to 1000 light source data.

CASIO computer using visible light communication technology "picalico" demonstration UAV monitoring. Received two aircraft ID. If it is a stationary point, can support up to 50 points.

Use the position and state