Tactile sensation plays important roles in virtual reality (VR) and augmented reality (AR) systems. Here, a self-powered, painless and highly sensitive electro-tactile (ET) system for achieving virtual tactile experiences is proposed based on triboelectric nanogenerator (TENG) and ET interface formed of ball-shaped electrode array. Electrostatic discharge triggered by TENG can induce notable ET stimulation, while controlled distance between the ET electrodes and human skin can regulate the induced discharge current. The ion-bombardment technique has been used to enhance the electrification capability of triboelectric polymer. This TENG-based ET system can work for many fields, including virtual tactile displays, braille instruction, intelligent protective suits or even nerve stimulation.
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