Fig. 4: Demonstration of the distortion-free S-AUX film-based stretchable display.

a Structural configuration of the distortion-free display components on the S-AUX film. Micro LEDs were placed on each square island of the rigid auxetic domain. Liquid metal electrodes were directly printed for interconnections. b Contour image of a micro-LED chip transferred onto the S-AUX film: emissive layer (green) and contact electrodes (orange) Scale bar= 50 µm; optical microscope images of a micro-LED chip on the S-AUX film, with 10 µm-thick liquid metal interconnections Scale bar= 50 µm; micro-LED array with a pitch distance of 1 mm and liquid metal interconnections with another configuration Scale bar= 200 µm, and its light-on state (inset). c Schematic illustrations of the S-AUX film-based image distortion-free display in its stretched state and released state. d Photographic images of the S-AUX film-based display: released state and stretched state. Scale bars= 5 mm. e I-V curves under uniaxial stretching from 0% to 20%, respectively. f Cyclic stretching reliability of the distortion-free display under repeated strain of 15% for 300 times. Plot is the normalized resistance change during cyclic stretching.