InfoLED: Augmenting LED Indicator Lights for Device Positioning and Communication

Augmented Reality (AR) has the potential to expand our capability for interacting with and comprehending our surrounding environment. However, current AR devices treat electronic appliances no different than common non-interactive objects, which substantially limits the functionality of AR. We present InfoLED, a positioning and communication system based on indicator light that enables appliances to transmit their location, device IDs, and status information to the AR client, without changing their visual design. By leveraging human insensitivity to high frequency brightness flickering, InfoLED transmits all those information without disturbing the original functionality as an indicator light. We envision InfoLED can be used in three categories of application: malfunctioning device diagnosis, appliances control, and multi-appliances configuration. We conducted three user study, measuring the performance of the InfoLED system, the human readability of the patterns and colors displayed on the InfoLED, and users' overall preference for InfoLED. The study results showed that InfoLED can work properly from a distance up to 7 meters in an indoor condition and it did not interfere with our participants' ability in comprehending the high-level patterns and colors of the indicator light. Overall, study subjects preferred InfoLED to an ArUco-based baseline system, and reported less cognitive load when using our system.