Self-Powered Tactile Information Visualization System Based on Triboelectric-Electroluminescent Coupling

Human-computer interaction (HCI) is profoundly changing how we engage with technology. Tactile visualization technology holds significant application value in intelligent interaction, health detection, and biometrics by translating mechanical stimuli into visual information. However, traditional systems typically rely on an external power supply and offer limited functions, which restrict electronic device performance, reliability, and application scope. This paper proposes a flexible self-powered display device based on polyvinylidene fluoride-trifluoroethylene (PVDF-TrFE) and phosphor-based electroluminescent (EL) film to achieve effective haptic-optical signal conversion. Integrated with a triboelectric nanogenerator (TENG), a self-powered multifunctional haptic visualization system has been developed to enable Braille dynamic display, motion tracking, and fingerprint recognition capabilities. Experiments indicate that the device can generate an open-circuit voltage exceeding 120 V and a short-circuit current of 1.2 μA under mechanical stimulation, sufficient to drive phosphor electroluminescent films without an external power supply. Coupled with artificial intelligence algorithms, the accuracy exceeds 95%. This study presents a novel concept for self-driven haptic visualization technology, highlighting its promising applications in flexible electronics, human–computer interaction, and energy technology interactions.