Design and Fabrication of Cylindrical Fiber Backplanes with 2T1C Pixel Circuits for Truly Wearable Woven Displays

Abstract

This study proposes a comprehensive approach to the fabrication of fiber-based thin-film transistor (TFT) arrays for active matrix applications. The study utilizes a direct patterning method with metal masks on cylindrical fiber substrates, which facilitates the formation of low-temperature TFTs with high mobility (≈10 cm2 V−1 s−1) and stable electrical properties. Critical fiber-related challenges, including thermal strain, surface roughness, and variations in thin-film thickness and composition, are addressed. The innovative TFT backplane design, optimized for cylindrical fiber structures, is proposed as a solution to the unique challenges posed by curved, flexible substrates. This design demonstrates exceptional potential for high-density integration, advanced functionality, and scalability in next-generation electronic systems. Pulse driving tests confirm the stable and reliable current driving in a two transistor and one capacitor pixel circuit, demonstrating its ability to maintain consistent operation under dynamic conditions. The results validate fiber-based TFTs as effective power sources for driving organic light-emitting diodes, heralding next-generation opportunities in truly wearable displays, smart textiles, and embedded electronics.