Self-powered wearable electrical stimulator using triboelectric methods for haptic interface

Recently, many wearable haptic systems have been researched in many groups. Tactile sensation offers important information in virtual reality and augmented reality systems. Typically, mechanical, electrical and thermal stimulations are applied on to skin. Therefore, these wearable stimulators must be light-weight, comfortable to wear, and reliable for long-term use to achieve full experience of tactile sensation. This report provides the device strategy of wearable haptic system using triboelectric nanogenerator to impart a self-powered, painless, and highly sensitive electro-tactile (ET) system for virtual tactile experiences. Furthermore, this report discusses details about a principle of triboelectric generation and each component of overall device including charge-generating layer, charge-trapping later, and charge-collecting layer. To show the potential of triboelectric-based haptic system for wearable device application, we explore the stretchable, skin-conformable materials which allow the wearable electronic system to be properly operated under dynamic environment of body. In addition, the mechanical and electrical properties of these materials under deformed condition will be examined.