There's actually methods being worked on to compensate for color degradation in AMOLED over time[1]. Many of the AMOLEDs being used by Samsung are also Pentile

There's actually methods being worked on to compensate for color degradation in AMOLED over time[1]. Many of the AMOLEDs being used by Samsung are also Pentile (since they're cheaper to produce), which is even more likely to suffer from what you mentioned as well. Originally, phones like the Galaxy S and S2 did not have a Pentile screen, but starting with the Galaxy Nexus, I think they all have since (including the S3 and the S4, albeit higher quality ones). [1] http://www.hindawi.com/journals/ijp/2013/839301/ http://www.hindawi.com/journals/ijp/2013/839301/