Samsung published a nice new infographics that shows the evolution of their mobile phone display. Samsung's first phone was released in 1988 - with a small monochrome text display that you couldn't even use for SMS messages (the phone was analog in any case).

Samsung doesn't mention the flexible OLED displays they are now starting to adopt.

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