Samsung Display has been developing polarizer-free AMOLED displays for many years, and last year UBI detailed how the company plans to use color filters to eliminate the need for polarizers and so increase the efficiency of their OLED panels while also lowering the thickness.
DSCC posted an interested article that details Samsung's upcoming polarizer-free OLEDs, which it brands as POL-LESS OLEDs. The first OLEDs to adopt this new structure are expected to be adopted in Samsung's Galaxy Fold 3 later this year.
The polarizer layer eliminates reflections in an OLED panel - but it adds about 50-100 micron in thickness, and it also blocks some of the light which reduces the brightness. Replacing the polarizer with a color filter makes sense - the thickness of the CF structure is less than 5 microns which is very useful - especially in foldable OLEDs.
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