The 352 nits for a full white screen increased to 418 nits for a white window pattern occupying 25 percent of the screen, and 469 for one occupying 2 percent. In addition to the "auto brightness" boost in sunlight we described above, the light output of the OLED screen increased when we measured a smaller white area. But the Samsung was still plenty bright, and its the "100% white" number above doesn't tell the whole story. In the past we've focussed quite a bit on the brightness advantage of LCD, and in our comparison the iPhone 6 did indeed measure brighter about 60 percent brighter than the Galaxy S5. Meanwhile we also noticed a slight off-angle haze at times on the new iPhones, which could be from the new sunglass- and direct sunlight-friendly polarizing filters. We noted that at times the iPhone screens seemed to have a sort of grayish film over black areas, especially the iPhone 5S, compared to the purer black of the Galaxy S5. Moving the phones to a darker area increased the Samsung's advantage further.
Not only did the black and shadowy areas appear darker, but the highlights looked brighter, giving the whole image more pop and life. Nighttime photos favor Samsung's high-contrast screen. We compared an array of test photos (courtesy of CNET's Lori Grunin) on the phones' screens side-by-side using an arrangement similar to the one with the flowers above, and the photo below showed the Samsung's contrast advantage most readily. Of course, with text, regular photos, and video, the visible difference isn't nearly as great as that number implies. According to our measurements, the GS5 absolutely trounced the contrast ratio of the iPhones, with a contrast ratio more than 325 times better. The difference was less obvious, although still visible, under normal lighting when looking at material with black and near-black sections.Ĭontrast ratio is the difference between the brightest image a display can create and the darkest, and it's considered the most important aspect of home theater picture quality. With a black test pattern the screen of the GS5 was basically invisible to the eye the same pattern on the iPhones was much brighter. The 0.0007 nits I measured is incredibly low, and I have an incredibly precise measuring device (pictured above), but even so I suspect it would be lower if not for stray light. The OLED screen of the GS5 is infinitely black. Look at the chart above and a couple numbers stand out: "0% black" and "contrast ratio" in Samsung's column, both of which require an astounding number of significant digits to express. Much as it is with TVs, that advantage is enough to make it the best-looking phone screen we've tested yet, and slightly better than the iPhones 6 and 6 Plus. The biggest visual advantage the Samsung brings to bear is contrast, thanks to the perfect black levels of its OLED screen. Resolution and pixel density, despite seeming like a big Galaxy advantage, is good enough on all four to be essentially moot. The iPhones are brighter and slightly more color-accurate, but the Galaxy is plenty bright and accurate-enough in its own right. In fact, despite using different tech, sizes and resolutions, their screens are so close, they pale in consideration next to differences like ecosystem, battery life, and overall design. Indeed, its victory over the iPhones was so narrow that it would be tough for most users to see many of the differences in day-to-day usage.Īll four phones we tested - we threw in the 5S for good measure, and we have yet to receive a Note 4 for review - have excellent screens. As usual each screen has particular strengths and weaknesses, but to our minds the has the best screen - albeit by a nose.
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