In the end this is better than those being accurate, as then anything beyond what the iPhone could display would be rendered identically so 60% blue and 100% blue would look the same, instead of both having errors that make them distinct to the eye. ![]() Even lower saturations are way off the target and have high numbers. While we know the iPhone 5 can reach the full saturations for each color, how well can it render those saturations that are less than 100%? Looking at the iPhone 4 quickly, we see that with its under-saturated gamut, we have very high dE2000 numbers across the board. Measuring how the phone handles saturations is another important step. The entire sRGB gamut is now available on the iPhone 5 and the result is outstanding. Colors like the yellow in the eBay app icon are much more vivid and saturated than before, and blues have far more shades available than previously. This improvement is very easy to notice on the iPhone 5 even without running numbers. Overall the grayscale of the iPhone 4 would be rated as very poor if it was a desktop display or a television. If we target a gamma of 2.2 that spike goes away, as the sRGB gamma is linear at the bottom end. The gamma also shows a clear spike at the bottom when we target the sRGB gamma curve. The grayscale has a very noticeable blue shift that can be seen in the numbers, and a CCT that is close to 10000K and not the 6500K that is the sRGB standard. Looking at the grayscale, the iPhone 4 puts out an average dE2000 of almost 10 across the spectrum. Clearly contrast levels have been improved here, despite the move to a larger screen that sometimes can affect them. This gives us contrast ratios of 1097:1 for the iPhone :1 for the iPhone 5. Black levels for the phones are 0.355 for the iPhone 4 and 0.412 for the iPhone 5. The backlight of the iPhone 4 could have become slightly dimmer over time, but using LEDs it really should not have faded much. Both are ahead of the specified numbers, but the iPhone 5 is clearly better here.Īt maximum brightness, the iPhone 4 has a maximum white output of 390 nits, and the iPhone 5 clearly trumps that with 562 nits. ![]() This gives us contrast ratios of 1008:1 for the iPhone :1 for the iPhone 5. Both phones had a minimum black level reading of 0.006 nits, but the iPhone 4 had a white level of 5.669 nits compared to the iPhone 5 and its reading of 8.303 nits. At the minimum value I couldn’t get any reading, which indicates that it’s below the 0.001 threshhold that the C6 is capable of reading. ![]() ![]() All readings are the average of three measurements from the C6, except for very dark readings where ten measurements were taken for more accuracy.įor comparing the minimum black and white levels in the iPhone 4 and 5, I set the brightness to the minimum level where I could get a reading from a black screen. Numbers were run using CalMAN 5 software, and a SpectraCal C6 colorimeter that was profiled from an i1Pro spectrometer. 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. 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. 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.
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