The Best Smartphone Display
· The iPhone X is the most innovative and high performance Smartphone display that we have ever tested.
· First we need to congratulate Samsung Display for developing and manufacturing the outstanding OLED display hardware in the iPhone X.
· But what makes the iPhone X the Best Smartphone Display is the impressive Precision Display Calibration that Apple developed that transforms the OLED hardware into a superbly accurate, high performance, and gorgeous display!!
See the Display Shoot-Out Comparison Table section below for the complete DisplayMate Lab measurements and test details.
See the Highlights and Performance Results section above for a detailed overview with expanded discussions and explanations.
See the Display Assessments section for the evaluation details.
The iPhone X has the following enhanced state-of-the-art display performance functions and features:
· A state-of-the-art OLED display that is manufactured on a flexible plastic substrate. While the OLED display itself is flexible, the screen remains rigid under an outer hard cover glass.
· A 2.5K High Resolution 2436 x 1125 Full HD+ Display with 458 pixels per inch, and Diamond Sub-Pixels with Sub-Pixel Rendering for enhanced sharpness and higher Peak Brightness.
· A radical new Full Screen design with a larger 5.85 inch OLED display that fills almost the entire front face of the iPhone X from edge-to-edge, providing a significantly larger display for the same phone size.
· A new display form factor with a taller height to width Aspect Ratio of 19.5 : 9 = 2.17, which is 22% larger than the 16 : 9 = 1.78 on most Smartphones (and widescreen TVs) because the display now has the same overall shape as the entire phone. It is taller in Portrait mode and wider in Landscape mode.
· A record high Full Screen Brightness for OLED Smartphones of 634 nits, which improves screen visibility in high Ambient Light. The Samsung Galaxy Note8 can produce up to 1,240 nits, but only for small portions of the screen area (Low Average Picture Levels) – for Full Screen the Note8 can produce up to 423 nits with Manual Brightness and 560 nits with Automatic Brightness only in High Ambient Light. For small portions of the screen area the iPhone X can produce up to 809 nits (Low Average Picture Levels). On its Home Screen the iPhone X produces an impressively bright 726 nits.
· The Highest Absolute Color Accuracy of any display we have ever tested, 0.9 JNCD (from Smartphones to TVs) based on our extensive Lab Measurements, which is Visually Indistinguishable From Perfect.
· 2 Industry Standard Color Gamuts: the sRGB / Rec.709 Color Gamut that is used for most current consumer content, and the new Wide DCI-P3 Color Gamut that is used in 4K Ultra HD TVs. The DCI-P3 Gamut is 26 percent larger than the sRGB / Rec.709 Gamut.
· Automatic Color Management that automatically switches to the proper Color Gamut for any displayed image content within the Wide DCI-P3 Color Space that has an ICC Profile, so images automatically appear with the correct colors, neither being over-saturated or under-saturated.
· The iPhone X supports Mobile HDR, which allows the iPhone X to play 4K High Dynamic Range content produced for 4K UHD TVs.
· A Night Shift Mode that allows the user to adjust and reduce the amount of Blue Light from the display for better night viewing and improved sleep.
· A True Tone viewing mode that automatically changes the White Point and color balance of the display based on real-time measurements of the ambient light falling on the screen to make the display behave more like paper reflecting ambient light and taking on its color.
· Small Color Shifts and Brightness Shifts with Viewing Angle.
· The iPhone X can be used with Polarized Sunglasses in both the Portrait and Landscape orientations unlike many LCDs, which generally work in only one of the two orientations.
The iPhone X matches or sets new Smartphone display performance records for:
· Highest Absolute Color Accuracy for any display (0.9 JNCD) which is Visually Indistinguishable From Perfect.
· Highest Full Screen Brightness for OLED Smartphones (634 nits).
· Highest Full Screen Contrast Rating in Ambient Light (141).
· Highest Contrast Ratio (Infinite).
· Lowest Screen Reflectance (4.5 percent).
· Smallest Brightness Variation with Viewing Angle (22 percent).
The Best Smartphone Display
The iPhone X delivers uniformly consistent all around Top Tier display performance and receives All Green (Very Good to Excellent) Ratings in all of the DisplayMate Lab test and measurement Categories (except for a single Yellow in Brightness Variation with Average Picture Level that applies to all OLED displays). See the Display Shoot-Out Comparison Table below for all of the measurements and details, and the Highlights and Performance Results section above for expanded discussions and explanations, and the Display Assessments section for the evaluation details.
Based on our extensive lab tests and measurements the iPhone X becomes the Best Performing Smartphone Display that we have ever tested, earning DisplayMate’s highest ever A+ grade. The iPhone X is an impressive display with close to Text Book Perfect Calibration and Performance!!
Improving the Next Generation of Mobile Displays
The iPhone X has a very high resolution 2.5K 2436x1125 pixel display with 458 pixels per inch (ppi) producing images that look perfectly sharp with normal 20/20 Vision under all normal viewing conditions, which always includes some ambient light that always lowers the visible image contrast and perceived image sharpness (Modulation Transfer MTF). Note that displays are almost never viewed in absolute darkness under perfect viewing conditions with ideal image content. Some clueless reviewers have been pining for 4K 3840x2160 Smartphones, which would require more than triple the pixels, memory, and processing power of the 2436x1125 display on the iPhone X, but there would be no visual benefit for humans! As a result, it is absolutely pointless to further increase the display resolution and pixels per inch (ppi) for a marketing wild goose chase into the stratosphere, with no visual benefit for humans!
With screen size and resolution already functionally maxed out, manufacturers should instead dedicate their efforts and resources into improving real world display performance in ambient light by using advanced technology to restore and compensate for the loss of color gamut, color saturation, and image contrast due to ambient light, something that every consumer will benefit from, and will also immediately notice and appreciate – providing a true sales and marketing advantage…
The most important improvements for OLED and LCD mobile displays will come from improving their image and picture quality and screen readability in real world ambient light, which washes out the screen images, resulting in reduced image contrast, color saturation, and color accuracy. The key will be in lowering the Screen Reflectance and implementing Dynamic Color Management with automatic real-time modification of the display’s native Color Gamut and Dynamic Intensity Scales based on the measured Ambient Light level in order to have them compensate for the reflected light glare and image wash out that causes a loss of color saturation and image contrast from ambient light as discussed in our Innovative Displays and Display Technology and SID Display Technology Shoot-Out articles.
In our High Picture Quality in Real World Ambient Lighting article we demonstrate that a major advantage of using Dynamic Color Management and Dynamic Intensity Scales rather than the current brute force method of just increasing the Picture Brightness in ambient light is that it can produce the same vibrant on-screen colors in ambient light with 75 percent less display power up through 2,000 lux, which is very important for TV energy efficiency, and also very important for Smartphones because they depend on limited battery power.
The displays, technologies, and manufacturers that succeed in implementing this new real world high ambient light performance strategy will take the lead in the next generations of mobile displays…