A few days ago Oppo unveiled the Oppo X, a rollable OLED smartphone that can open up to increase the display size. When closed the Oppo X has a 6.7-inch AMOLED, and when rolled open it can reach 7.4 inches.
According to Gizmochina, BOE produces the rollable display for Oppo. BOE unveiled its first rollable OLED prototype in 2019. According to reports LG Electronics has plans to build a rollable smartphone in early 2021, using BOE's panels.