According to a CINNO report, the flexible AMOLED screen supplier for OPPO X 2021 scroll screen concept phone is BOE. ( Apple Supplier BOE is making OLED screens for the iPhone 12 ).
The screen can be stretched from 6.7 inches to 7.4 inches. The reel design takes into account both the large screen and the portability; but it also creates new problems. The internal structure of the phone is complicated and heavier than other phones.
Edit Reading OPPO X 2021 OPPO Concept Model Name
The scroll screen is indeed a better solution, fold screen crease problems long-term use, Galaxy fold smartphone series and HUAWEI mate x smartphone.
BOE Display, founded in 1993 in Beijing China, is one of the world’s leading display maker, producing both LCDs and OLEDs, also committed to accelerating the development of AMOLED, flexible display.