Sensory and extra-sensory interactive displays with field-induced electroluminescence

Human-interactive displays (HIDs) facilitate the visualization of sensible information such as touch, smell, and sound and have attracted significant interest owing to their potential in emerging IoT-connected wearable electronics. Furthermore, the visualization of phenomena that is rarely sensible, such as magnetic fields, ultrasonic waves, and odorless toxic gases or liquids, can further broaden the utilization of HIDs. Field-induced electroluminescence (EL) of either organic or inorganic fluorescent materials under alternating current (AC) has been extensively studied and its unique device architecture in which an emitting layer is separated with an insulator from electrode offers a new platform for designing and developing emerging HIDs. Here, we present various sensory and extra-sensory interactive displays based on AC EL.