All you Need to Know About Smartphone Screens
So What’s Happening Now!
Samsung has actually decides to focus on HD Super AMOLED display and drop its Super AMOLED Plus. This move has actually caused some disappointment in the minds of Samsung fans because Super AMOLED Plus with its with RBG layout is better that HD Super AMOLED. And the latest Galaxy S III comes with HD Super AMOLED, not with Super AMOLED Plus which is there in Galaxy S II.
An Insight on Pixel density
Pixel density depends in how you split pixels and subpixels, the more pixels you have per inch, the better your picture. In today’s standard if you see, the Apple iPhone 4/4S comes with a small 3.5-inch screen, but has a high 960x640-pixel resolution having 326 pixels per inch. So if we start comparing, HTC One X has a 4.7-inch screen, 1,280x720-pixel resolution and pixel density of 312 pixels per inch; the Samsung Galaxy Note sports a huge 5.3-inch screen, but has only 1,280x800-pixel resolution with 285 pixel density.

