The iPhone 5 Display: Thoroughly Analyzed
 

When Apple rolled out the iPhone 5, they announced that it had a full sRGB gamut, which the new iPad almost achieves and would be a substantial improvement over the 4 and 4S displays. The slight increase in screen resolution and size means we are looking at a new panel than the previous generations used as well, with the new panel being speced at 800:1 contrast ratio and 500 nits of brightness. I don’t have a 4S to test, but used my iPhone 4 that was bought on launch day and has been in use since then for comparison. Numbers were run using CalMAN 5 software, and an SpectraCal C6 colorimeter that was profiled from an i1Pro spectrometer. All readings are the average of 3 measurements from the C6, except for very dark readings where 10 measurements were taken for more accuracy.

http://www.anandtech.com/show/6334/i...en-performance