Visible light communication system with ARQ applied to smart mobile device

Recently, data transmission has become more important in our daily life. The developments of communication component are diverging with electromagnetic (EM) techniques. According to the popularity of wireless communications, the limitations of transmission also appear. Especially, electromagnetic interference (EMI) and frequency spectrum shortage would limit the application of wireless communication in mobile devices. To overcome these issues in existing equipment, we design a wireless visible light communication (VLC) system over the mobile device with liquid-crystal display (LCD) and digital cameras. The value of mobile device can be increased, while the auto-repeat-request (ARQ) and convenient VLC is developed without additional hardware cost. The transmission rate is up to 2.4 Kbps in our experiment.