Visual Light Communications
Light Emitting Diodes (LEDs) are used in consumer electronics, toys, light bulbs, cars, and monitors. With LEDs, it is possible to control their brightness at a frequency much higher than conventional light bulbs: LEDs can be switched on and off at very high rates. As result, LED-based lightning can be used for wireless communication services by modulating the intensity of the emitted light. Further, LEDs can also be used as receivers just like photo diodes. This concept is called Visible Light Communication (VLC). VLC creates opportunities for low-cost wireless communication for parks, resorts, and consumer electronics in general. We evaluate the potential of VLC transmitter and receiver architectures, starting with (but not limited to) LED-to-LED communication. Using visible light instead of radio communications addresses concerns about electro-magnetic radiation. Our work targets a full system design that spans from hardware prototypes to communication protocols, and applications.