77‐3: <i>Distinguished Student Paper:</i> Highly Recoverable and Robust Rollable AMOLED Display with Smart Elastomer Materials

A new highly recoverable and robust rollable AMOLED display with a novel double stacked module structure consisting of two smart elastomer layers with high modulus and low modulus, was suggested and significantly improved pen drop height from 2cm to 9.5cm with additional special treatment for elastomer layer removing an electro‐static damage on panel image, coming from increase of gate voltage of 1.2V due to repeated friction between top layer and bottom layer during cyclic rolling. The top protective layer of elastomer enormously reduced strain of panel and shear strain of PSA and therefore, lessened deformation height of rollable display at the edge up to 4mm after rolling radius of 15mm and rolling cycles of 200,000. The top protective layer of elastomer with tensile hardening property was able to remarkably increase energy damping effect for pen drop test and led to rise of pen drop height. The unique rolling strain distribution was systematically analyzed using strain gauge sensor and simulation tool and validated by experimental results. This novel double stacked structure also showed outstanding environmental reliability results as well.