Sensitivity-Adjustable, Negatively Strain-Resistive Switch-Type Conductive Fibers for Textile-Based Stretchable Displays with Hidden-Pixel Structures

The development of textile-based stretchable displays has faced challenges related to the deterioration of image quality due to mechanical stretching. In this study, we introduce a novel approach to address this issue by implementing negatively strain-resistive switch-type conductive fibers based on pre-designed crack localizing technologies. The fabricated switch exhibited an extremely-high negative gauge factor (resistance change ratio $\approx 10 ^{9}$ ohms) that can dramatically convert its insulating properties into conducting ones. The integration of this fiber-based on/off switch into the stretchable displays enables the activation of hidden-pixel structures to maintain image resolution and luminance under tensile strain conditions. This cutting-edge solution paves the way for the next generation of stretchable display technologies for various wearable applications.