So in effect when using a retina display you shouldn't be able to notice the spacing around pixels. We normally don't use a screen to close to our eyes to see it in that detail. The rounded edges are a lot smoother, as an example. We can see that the spacing aruond each pixel is much smaller, producing a higher quality image with much more details. This is a screen that has the same physical size of the left one but the resolution is doubled. On the right we have the same picture presented on a retina display. We can see that there's a lot of spacing around each of the dots that compromises the image quality. On the left we have an image presented of the non-retina one. non-retina photos" and is the magnified photo of two Mac displays. The image above was taken from the article "Real retina vs. While the original has a 165 ppi, iPhone 4 had an stunning 326 ppi!īut what does this means in practice? A picture still worth a thousand words (no pun intended). So in the example above either the original iPhone and the iPhone 4 had an 3,5' inch display. The higher the density the better the quality of the image because with more pixels the image can more detailed. Its normally measured by ppi, or pixels per inch, that is the quantity of dots or pixels that fits into an inch of that screen.
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