We quickly covered this issue when we originally reported on Samsung’s new Super AMOLED HD display technology back in August, way before the Galaxy Nexus was announced. All current smartphone HD (over 1280×720 resolution) AMOLED displays that Samsung is producing use PentTile Matrix technology. The displays can be found in Samsung’s just announced, Android 4.0 bearing, Galaxy Nexus and the 5.3-inch mammoth Galaxy Note.

So what’s the big deal you might ask, well display purists will tell you that PenTile technology is sort of Samsung’s way of cheating into getting a higher resolution display, overcoming current AMOLED manufacturing limitations of packing ‘subpixels’ more densely.

In standard RGB flat panel screens, each pixel is made of three subpixels, one for each color, Red, Green and Blue. Samsung’s PenTile screens have only two subpixels per pixel, and instead ‘borrow’ subpixels from neighboring pixels to ‘mix’ the right color. This leads to a blurring of sharp edges, while white blocks may get a tint at the edges. The higher pixel density a PenTile display has, the less profound these effects would be.
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