According to UBI Research’s 3rd quarter OLED display market track, the size of OLED for smartphones is gradually shifting from 5.5~5.99 inches to 6~6.49 inches.
Among the OLED shipments for smartphones of 430 million units in 2017, 5.5-5.99 inches accounted for 52.5%, but in the shipment performance until the third quarter of 2019, 5.5-5.99 inches decreased to 49.6% and 6-6.49 inches increased to 42.3%.