TCL's display-development subsidiary CSOT has prepared 2 of its flexible prototypes that can function when paired to rollers for display at CES 2021. One is the extendable AMOLED panel that may have been seen as part of a concept smartphone before. The other is a 17-inch piece of OLED that may show what the OEM can offer the makers of devices such as transparent TVs.
https://www.notebookcheck.net/TCL-CSOT-shows-off-its-rollable-OLED-and-AMOLED-displays.514508.0.html