AnandTech after a series of display testing:
Wrapping up, the iPhone 5 display is a whole quantum leap better than the display on the iPhone 4. Contrast levels and light output have both been increased, and color performance is astonishing. The full sRGB gamut is present here, and color errors are remarkably low for a even a high end desktop display. While many were hoping for a move to OLED or some other screen innovation, this really is a huge step up that is very easy to quantify. To put this in perspective, in the past few years I’ve reviewed probably 30-40 different displays, from PC monitors, to TVs to projectors. Not a single one, out of the box, can put up the Gretag Macbeth dE numbers that the iPhone can, and perhaps one projector (which listed for $20,000) can approach the grayscale and color accuracy out of the box.
Apple obviously has very high control over what parts they use and what comes off their assembly lines. I don’t know if they are having the displays individually adjusted after they are assembled, or if the quality control is very strict, or if I just got a really remarkably lucky sample. I do know that if TV and PC Monitor vendors were able to provide displays that looked like this out of the box, professional calibrators would lose a good amount of business potentially. The new panel in the iPhone 5 is simply remarkable in quality and if it were a PC monitor, I’d give it a Gold Award on the basis of its performance.
Can’t wait to get my hands on one.