Customizable, self-healing, and biocompatible microLED-hydrogel integration displays

Visualization is a fundamental interface method for efficient human-computer interaction, encompassing the evolution of visual displays from large screens to mobile devices, and now advancing toward implantable displays. we have developed a hydrogel composite display with high transparency (95 % visible light transmittance), high electrical conductivity, and self-healing properties. We proved a vapor-phase bulk transfer protocol to transfer high-performance, small-sized (94 μm), and high-resolution (254 PPI) GaN micro-LED arrays (100 × 100) onto hydrogel substrates with minimal damage, high precision, and meticulous patterning. The self-healing ability of the hydrogel enables arbitrary cutting and splicing for future human-computer interaction display products, breaking through the limitations of various sizes and conformations. Moreover, the dehydration curing/hydration recovery process accomplishes an impressive secondary molding function for the display. Building upon these advancements, we have developed an ultra-thin (200 μm) implantable biocompatible display that is only 1/10 the thickness of the dermis to enhance human-computer interaction experiences. With the deepening interactions between people, machines, and the meta-universe in the future information society, hydrogel-based self-healing micro-LED displays will meet the diverse needs of various visual perception carriers.