The S4 features a 5-inch 1080 x 1920 pixel screen, extremely sharp and vivid. But it is also just Super AMOLED and not a Super AMOLED Plus. What this means is it uses a PenTile matrix arrangement with less subpixels than the traditional RGB one. What went a bit under our radar is the actual arrangement of the pixel.
It’s something Samsung refers to as “diamond pixels” and a recent DisplayMate study reveals the actual arrangement in detailed pictures of the display under a microscope.
What’s interesting about it is the different size of the sub-pixels. Blue is the largest one since it has the lowest efficiency and in contrast green is the smallest one.
Here is DisplayMate expert’s comment on this type of arrangement: