A “One-Stone-Two-Birds” Strategy Constructed Hybrid Wearable Device Based on Chameleon-Inspired Integrated Pressure Sensing and Visualization

Abstract

Conventional wearable devices mainly focus on physiological signal sensing, lack feedback for information, and rely on bulky display devices. Moreover, the external wired signal transmission in traditional physiological detection severely limits the practical application. Herein, inspired by the “one-stone-two-birds” ability of chameleon to sense external stimuli and change their colors, a visual pressure-sensing integrated hybrid device based on iontronic sensing and electrochromic display is proposed, in which the device structure is simplified by sharing electrodes and color-changing layers instead of the traditional two color-changing electrodes. The hybrid device based on the photocuring process simplified the preparation process, with its pressure-sensing unit exhibiting a sensitivity of 358.1 kPa⁻¹ and a response/recovery time of 16.8/28.0 ms, and color-changing unit having a colored/bleached time of 4.2/4.8 s. Utilizing its excellent performance, applications like quick response code encryption under alternating potential, visual info hiding/display under pressure perception, and physiological monitoring are explored and validated. In addition, a smart wireless wristband system is designed that monitors physiological signals in real time via Bluetooth transmission with a display that shows different motion states. It is envisioned that these strategies will have great potential for intelligence transmission encryption, interactive visual communication, and medical wireless monitoring.