DSCC released the interesting (but confusing, note the legend starts at 350M) chart below, detailing the market share of smartphone OLED producers in 2016-2019. As can be seen Samsung will remain the dominant producer, but its market share in 2019 will drop from 94% in 2018 to around 85%.

OLED shipments by producer (2016-2019, DSCC)

Non-SDC shipments will increase to 73 million units in 2019 - led by LG Display (~25 million units), BOE (around 20 million) and Visionox (around 15 million units).

Atomic Force Microscopy for next-gen OLED processesAtomic Force Microscopy for next-gen OLED processes