The Scroll smartphone concept in inspired by ancient scrolls and comes with a 10-inch display rolled up inside a stylish tube-like leather finish case, while the ZeroEdge design proposes a 14-inch 99% screen-to-body ratio OLED display that wraps around its left and right edges to offer side touch functions like we see on quad-curved smartphone displays.
https://www.notebookcheck.net/Compal-presents-Scroll-rollable-phone-concept-and-ZeroEdge-laptop-OLED-displays.524081.0.html