The screen, on the other hand, is truly beautiful. This is still a 5.1-inch, 432 ppi 1,920-by-1080 Super AMOLED display, very similar to the S4’s screen. But Samsung put a custom image chip in here that dynamically adjusts the color gamut and contrast based on ambient light. It’s a big step up from the standard automatic brightness control, and it makes the colors really pop under different lighting conditions.
But there are other more advanced methods to improve display performance in ambient light that weâ€™ll be seeing in 2014. One is to use a display with a slightly curved (concave) screen that reduces reflections as mentioned above. Another is by using an Ambient Light Sensor to accurately adjust the screen brightness â€“ most current implementations are close to useless but they are getting better. The most advanced method is to also use the Ambient Light Sensor to accurately vary the displayâ€™s Color Gamut and Intensity Scale to compensate for the washed out images resulting from ambient light reflecting off the screen.
According to Soneira quantum dots can offer a similar solution with LCDs. As far as I know Sony is the only company using quantum dots for smartphone LCDs (e.g.. the Sony Xperia Z2), and Amazon for tablets.