Electroluminescent Liquid Metal Marbles for Reconfigurable Multi‐Color Display

Abstract Conventional display technologies rely on rigid architectures, limiting their adaptability for reconfigurable systems. Plasma discharge, as a field‐driven excitation method, offers great opportunities for visual interfaces, yet integrating it into controllable and adaptable color display platforms remains challenging. Here, configurable and adaptable electroluminescent platforms based on the plasma discharge of phosphor‐coated liquid metal marbles based on eutectic gallium indium liquid metal droplets are presented. Electroluminescent phosphors emitting the red, green, and blue primary colors are used as a functionalizing coating for the droplets. Mixing different types of phosphor particles at controllable ratios fine tunes the electroluminescent color emitted from individual air gaps between adjacent liquid metal marbles. Such a particle‐mixing‐enabled additive color mixing strategy enables bright color emission across the whole visible spectrum and plasma‐discharge‐based pixelated multicolor display of diverse reconfigurable patterns. This low‐cost and easily reconfigurable liquid metal marble platform offers a multicolor display technique for future displays.