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What do the numbers mean in mobile phone screen resolution?

If a mobile phone screen has a resolution of 480x320, what do those numbers actually mean??

Most Useful Answer MDrX  Jan. 9, 2012 at 11:15

The longest side of the screen is 480 pixels and the shortest is 320 pixels

Basically a pixel (picture element) is part of the display and changes colour/intensity, all of them together create what you see on the screen.

Resolution is the amount of pixels, so the iPhone's 960x640 is a higher resolution than the 480x320 you mentioned. Generally the higher the resolution, the crisper the display.

But here comes pixels per inch (ppi, sometimes referred to as dots per inch or dpi) this is the amount of pixels crammed into a square inch. The iPhone 3G had a 480x320 screen that was 3.5" across the diagonal. The iPhone 4 had the 960x640 screen but still 3.5" so this doubled the ppi and gave the smoother fonts and clearer images because more detail can be fit into the same space.

If you had a screen that was 960x640 but 7" then you'd have the same ppi as the iPhone 3 with jagged fonts. So don't expect a 7" tablet with the same resolution as the iPhone 4 to have such a clear display.

As with everything in life it can get very complicated but that's the basics covered. You should do more reading if you're bothered about it or if some guy in Phones4U is trying to blind you with bullcrap.

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MDrX  Jan. 9, 2012 at 11:15

The longest side of the screen is 480 pixels and the shortest is 320 pixels

Basically a pixel (picture element) is part of the display and changes colour/intensity, all of them together create what you see on the screen.

Resolution is the amount of pixels, so the iPhone's 960x640 is a higher resolution than the 480x320 you mentioned. Generally the higher the resolution, the crisper the display.

But here comes pixels per inch (ppi, sometimes referred to as dots per inch or dpi) this is the amount of pixels crammed into a square inch. The iPhone 3G had a 480x320 screen that was 3.5" across the diagonal. The iPhone 4 had the 960x640 screen but still 3.5" so this doubled the ppi and gave the smoother fonts and clearer images because more detail can be fit into the same space.

If you had a screen that was 960x640 but 7" then you'd have the same ppi as the iPhone 3 with jagged fonts. So don't expect a 7" tablet with the same resolution as the iPhone 4 to have such a clear display.

As with everything in life it can get very complicated but that's the basics covered. You should do more reading if you're bothered about it or if some guy in Phones4U is trying to blind you with bullcrap.

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