iPad 2 is Planning to quadruple pixels as 2048 x 1536
Last summer, iPhone 4 doubled its screen resolution in both directions (from 320 x 480 to 640 x 960), resulting in four times the pixels and an industry-leading pixel per inch density of 326. Apple called the new screen the "Retina Display," because it exceeded the typical resolution of the human eye, making individual dots all but impossible to discern. The original iPad offered a 1024x768 resolution (at 132 ppi), leading many to guess that the next version might also get a similar Retina Display. However, a 300+ ppi display covering a 9.7 inch screen would require a fantastically high resolution.
Instead of aiming for a specific pixel density, it appears Apple will instead simply quadruple the iPad's native resolution as it did when it introduced iPhone 4, resulting in a very high resolution display with a pixel density of around 260 ppi, short of "Retina" status but still higher than most high end smartphones.
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