Low cost solution to remotely refresh display devices using LED

White LED offers advantageous properties such as high brightness, low power consumption and long lifetime. While the use of white LEDs for communication has been proposed, but it is very difficult to install many such “visible light communication” solutions in public places because of high cost of the specialized components required to assemble these solutions. This paper demonstrates an end to end system that can remotely refresh displays in a reasonable time using LED lights for communication keeping the design cost as low as possible. The transmission scheme involves transmitting differential signals via a pair of low cost high brightness LEDs. The scheme works at the pixel level and not with compressed images and is targeted at applications where a few pixels need to be refreshed at a time and which can tolerate higher bit error rates.