Visible light communication system : Nakagawas Group

The Nakagawa Laboratory is researching communication using visible light, an everyday phenomenon all around us. The Nakagawa Lab is a world pioneer in visible light communication. Professor Nakagawa and Professor Haruyama serve as Honorary Chairman and Chairman of the Visible Light Communication Consortium. Along with many businesses, the Consortium is working to standardize visible light communication. At Keio Techno-Mall in December 2009, there were demos of visible light communication, and the latest research results were presented. Q. Regarding the specifics of our research, the idea is to use the light you can see from LED lighting, traffic signals, and signs to send information. If that becomes possible, then because LED lighting is used in lots of places, people would be able to use a ubiquitous network. In one of the demos at Keio Techno-Mall, a robot was controlled using visible light communication. Position data is sent using visible light to control the robot, which has an image sensor as well as a light sensor. The robot can determine its own position, based on data about the position of the light source. Q. In this demo, the scenario is that these sensors are attached to a wheelchair, and position data is received from the LED lighting in a hospital, to guide the patient to a doctor. In the Nakagawa Lab, another example of visible light communication is a demo wireless LAN system that uses visible light to achieve a speed of 100 Mbps. If such systems can be …
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