A Multi‐Channel Circuit Simplification System for Flexible Fabric Keyboard Based on Knitted Interlock Derivative Fabric Triboelectric Nanogenerator

ABSTRACT The keyboard is one of the most essential human‐computer interaction devices in daily life. However, conventional keyboards often suffer from issues such as poor ergonomic fit and inconvenient usability. Textile‐based triboelectric nanogenerators (t‐TENGs) offer a promising solution to these challenges. Nevertheless, the development of t‐TENGs has been significantly constrained by the complexity of signal transmission circuits. In this study, we introduce a knitted interlock derivative fabric triboelectric nanogenerator (KIDF‐TENG) with an arched surface, fabricated using advanced knitting technology. The KIDF‐TENG exhibits highly stable electrical output, demonstrating minimal dependence on pressure and frequency, and maintains consistent performance after 10 000 operational cycles and multiple washing tests. Furthermore, we developed a multi‐channel circuit simplification system (MCSS) that enables the transmission of multiple sensor unit signals through a single signal transmission channel by combining KIDF‐TENG arrays of different materials based on their dielectric properties. The resulting flexible fabric keyboard, based on the MCSS, can transmit signals from ten sensing units using only three signal transmission channels. Additionally, the keyboard offers antibacterial properties, silent operation, and washability. This research presents a novel approach for developing flexible fabric keyboards and simplifying circuits for multi‐channel flexible sensors.