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OnePlus 7 Pro OLED Display Technology Shoot-Out

 

Dr. Raymond M. Soneira

President, DisplayMate Technologies Corporation

 

Copyright © 1990-2019 by DisplayMate Technologies Corporation. All Rights Reserved.

This article, or any part thereof, may not be copied, reproduced, mirrored, distributed or incorporated

into any other work without the prior written permission of DisplayMate Technologies Corporation

 

 

OnePlus 7 Pro

 

Introduction and Overview

The key element for a great Smartphone has always been a truly innovative and top performing display, and the best leading edge Smartphones have always flaunted their super high tech displays. It is the display performance that determines how good and how beautiful everything on the Smartphone looks, including the camera photos and all of your Apps, and also how readable and how usable the screen is in high ambient lighting. The Display is the crown jewel of the Smartphone!

 

In this Display Technology Shoot-Out article series we only cover the Very Best State-of-the-Art Top Performing and Top Tier Smartphone Displays. The articles are designed to promote superior Display Performance so that consumers, reviewers, and journalists all recognize and appreciate Display Excellence, and also to reward and encourage manufacturers to produce top performing displays for their products.

 

The OnePlus 7 Pro has a very impressive Top Tier Smartphone Display with close to Text Book Perfect Calibration Accuracy and Performance that is Visually Indistinguishable From Perfect. Based on our extensive Lab Tests and Measurements the OnePlus 7 Pro receives a DisplayMate Best Smartphone Display Award earning DisplayMate’s highest Overall Display Assessment Grade of A+ and setting or matching 10 Smartphone Display Performance Records. This demonstrates that OnePlus recognizes the importance of Display Excellence and has made a major commitment to improving Smartphone Display Performance.

 

In this article we Lab test, measure, analyze, and evaluate in-depth the display on the OnePlus 7 Pro. This is an independent scientific objective Lab test and analysis of OLED displays written for consumers, reviewers, and journalists. It is the latest edition in our nine year article series that has Lab tested, tracked and analyzed the development of mobile OLED displays and display technology, from its early beginnings in 2010, when OLED displays started out in last place, into a rapidly improving and evolving display technology that now has a commanding first place lead and continues pushing ahead aggressively.

 

The Move to OLED Displays

LCDs are a great cutting edge high performance display technology for Tablets to TVs, but for small handheld Smartphones, OLED displays provide a number of significant advantages over LCDs including: being much thinner, much lighter, without needing a bezel, providing a rimless edge-to-edge design. They can be made flexible and into curved screens, plus they have a very fast response time, better viewing angles, and an always-on display mode.

 

Many of the OLED performance advantages result from the fact that every single sub-pixel in an OLED display is independently directly electrically powered to emit light, so only the active image sub-pixels draw power based on their individual brightness levels. OLEDs can also provide better color accuracy, image contrast accuracy, and screen uniformity because the irregularities and variations in LCD Backlights introduce color and brightness irregularities and variations over the screen.

 

As the result of their very versatile power management capabilities, OLEDs are not only more power efficient than LCDs for most image content, but they now deliver much higher Peak Brightness than LCDs because the maximum power can be delivered to just the sub-pixels that are needed for producing the current image. However, for mostly all white screen content, LCDs are likely to remain brighter and more power efficient for a while.

 

OLED displays now have tremendous performance advantages over LCDs, so high-end and flagship Smartphones need OLED displays in order to compete at state-of-the-art performance levels, securing OLED as the definitive premier display technology for Top Tier Smartphones in the foreseeable future over the next 3-5 years. With the continuing improvements in OLED hardware performance, picture quality, and precision accuracy, it will be much harder for new display technologies to challenge OLED.

 

Some of the OnePlus 7 Pro Display Highlights

These are a few of the OnePlus 7 Pro Display Highlights that we will be covering in detail throughout the article:

 

· Very High Absolute Color Accuracy (0.8 JNCD) that is Visually Indistinguishable From Perfect.

 

· Very High Image Contrast Accuracy and Intensity Scale Accuracy that is Visually Indistinguishable From Perfect.

 

· High Brightness Mode (583 nits to 813 nits) in High Ambient Light.

 

· Peak Brightness, Color Accuracy, Contrast Accuracy and Intensity Scales that are Independent of the on-screen image content.

 

· Small Shifts in Brightness and Color with Viewing Angle, including White, which is the most common background color.

 

· Record Setting OnePlus 7 Pro matches or sets 10 Smartphone Display Performance Records, earning DisplayMate’s highest ever A+ grade.

 

· Highlights: The Highlights and Performance Results section has detailed information and analysis on the OnePlus 7 Pro display.

 

· Features: The Display Performance Functions and Features section lists all of the major functions and features.

 

· Records: The Display Performance Records section lists the Lab Measurement performance records.

 

· Data: The Display Shoot-Out Lab Measurements Comparison Table has all of the detailed measurements and test details.

 

· Conclusions: You can also go directly to the OnePlus 7 Pro Conclusions section which summarizes all of the Features, Functions and Results.

 

We’ll cover all of the these display performance topics and much more, with in-depth expert comprehensive display tests, measurements and analysis that you will find nowhere else.

 

 

Article Overview

This article has the following major sections:

 

· OnePlus 7 Pro Highlights and Performance Results

 

· OnePlus 7 Pro Conclusions

 

· OnePlus 7 Pro Display Performance Functions and Features

 

· OnePlus 7 Pro Display Performance Records

 

· The Future of OLED Smartphones

 

· Improving Display Performance for Real World Ambient Light

 

· OnePlus 7 Pro Lab Measurements Comparison Table

 

 

The Display Shoot-Out

To examine the performance of the OnePlus 7 Pro OLED Display we ran our in-depth series of Mobile Display Technology Shoot-Out Lab Tests and Measurements in order to determine how the latest OLED displays have improved. We take display quality very seriously and provide in-depth objective analysis based on detailed laboratory tests and measurements and extensive viewing tests with both test patterns, test images and test photos. To see how far OLED and LCD mobile displays have progressed see our 2010 Smartphone Display Shoot-Out, and for a real history lesson see our original 2006 Smartphone Display Shoot-Out.

 

OnePlus provided DisplayMate Technologies with a pre-announcement production unit of the OnePlus 7 Pro so that we could perform our well known objective and comprehensive DisplayMate Lab tests, measurements, and analysis, explaining in-depth the display performance results for consumers, reviewers, and journalists as early as possible.

 

 

 

 

 

 

 

 

Color Gamuts

Click to Enlarge

 

Color Accuracy

Click to Enlarge

 

Color Shifts

Click to Enlarge

 

Intensity Scales

Click to Enlarge

 

Display Spectra

Click to Enlarge

 

 

OnePlus 7 Pro Highlights and Performance Results

In this section we review and explain the principal results from the extensive DisplayMate Lab Tests and Measurements

in the following categories:  Display SpecificationsOverall AssessmentsScreen ReflectionsBrightness and Contrast,

Colors and IntensitiesAbsolute Color AccuracyViewing AnglesOLED SpectraDisplay Power.

 

Display Lab Tests and Measurement Data Table

See the Display Shoot-Out Lab Measurements Comparison Table below for the complete set of DisplayMate Lab Tests and Measurements.

 

Main Topics Covered

This Display Highlights and Performance Results section has detailed information and analysis on the OnePlus 7 Pro Display for the Main Topics listed below.

You can skip this section and go directly to the OnePlus 7 Pro Conclusions for a Summary of the Display Test Results.

 

· Large Full Screen Display

 

· 3K High Resolution Display

 

· High 90 Hz Screen Refresh Rate

 

· Selectable Color Gamuts and Screen Calibration Modes

 

· Industry Standard Color Gamuts

 

· Automatic Color Management

 

· Very High Contrast Accuracy and Intensity Scale Accuracy

 

· Peak Brightness that is Independent of the on-screen Image Content

 

· Color Accuracy and Intensity Scales that are Independent of the Image Content

 

· Natural Mode with Very High Absolute Color Accuracy

 

· Vivid Mode with Vibrant Colors and Contrast

 

· Advanced AMOLED Wide Gamut Mode

 

· Advanced Modes with User Adjustable White Point

 

· Advanced AMOLED Wide Gamut Mode in Ambient Light

 

· High Screen Brightness and Performance in High Ambient Light

 

· High Brightness Mode

 

· High Dynamic Range Mobile HDR10+ Display

 

· Viewing Angle Performance

 

· Night Mode with Reduced Blue Light

 

· Super Dim Setting

 

· Diamond Sub-Pixels

 

· Viewing Tests Performance

 

· Display Power Efficiency

 

· Display Related Enhancements

 

· Large 6.67 inch Full Screen Display with a Wide Aspect Ratio of 19.5 : 9

The OnePlus 7 Pro has a large 6.67 inch State-of-the-Art Curved Full Screen Flexible OLED display that fills the entire front face of the phone from edge-to-edge without any notches, cutouts, or holes. While the OLED display itself is flexible, the screen remains rigid under an outer hard cover glass.

 

The display also has a 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. This provides extra space for Notifications and for displaying multiple Apps and content simultaneously on-screen side-by-side.

 

The main screen has rounded corners and is curved along both the left and right edges that can be viewed from both the front or the sides, and even when the phone is placed face down. This is particularly helpful for status messages, notifications, memos.

 

· 3K High Resolution Quad HD+ 3120x1440 Display with 516 pixels per inch

As a result of its large display size and Aspect Ratio, the OnePlus 7 Pro has a 3K High Resolution Quad HD+ display with 3120x1440 pixels and 516 pixels per inch, with 4.5 Mega Pixels, more than double the number on your HDTV. It can display more than four complete HD 1280x720 images at once. The display has Diamond Sub-Pixels (see below) and Sub-Pixel Rendering with 516 pixels per inch (ppi), providing significantly higher image sharpness than can be resolved with normal 20/20 Vision at the typical viewing distances of 10 inches or more for Smartphones, so the display appears perfectly sharp.

 

The OnePlus 7 Pro uses Sub-Pixel Rendering, which further improves image sharpness because the individual Red, Green and Blue Sub-Pixels are treated as independent addressable image elements and are not bound together into fixed Pixels, so the closest sub-pixel is used when rendering the image. In some cases Sub-Pixel Rendering can make the screen appear to have up to 3 times the resolution of traditional Pixel Rendering. As a result, for Smartphones it is absolutely pointless to further increase the display resolution and pixels per inch (ppi) up to 4K (3940x2160 pixels) for a silly marketing wild goose chase into the stratosphere, with no visual benefit for humans!

 

· High 90 Hz Screen Refresh Rate

Most Smartphones refresh their screens 60 times per second (Hz) or less. The OnePlus 7 Pro display has a much higher 90 Hz Refresh Rate.

 

This 50% higher Refresh Rate provides several important advantages, including much smoother scrolling of screen content, and smoother videos and animation.

 

In addition, some people can sense screen flicker on some Smartphone displays, which can result in visual fatigue, eye strain, and headaches. The 50% higher Refresh Rate and higher Pulse Width Modulation Rate of 360 Hz for the OnePlus 7 Pro may reduce or eliminate this effect for some users that are affected by display flicker.

 

· Selectable Color Gamuts and Screen Calibration Modes

The OnePlus 7 Pro provides 5 user selectable Screen Calibration modes that provide control of the Color Gamut, Vividness and Contrast of the displayed images. They are the Natural mode, which provides the most Accurate Colors and Contrast, the Vivid mode, which provides more Vibrant Colors and Contrast, and 3 Advanced modes that include: an adjustable sRGB Gamut mode, an adjustable Display-P3 Gamut mode, and an adjustable AMOLED Wide Gamut mode that provides the Full Native Color Gamut of the OLED display.

 

See this Figure for the Color Gamuts and Color Modes and the Colors and Intensities section for the measurements and details. Note that the Vivid mode is the standard and factory default Screen Calibration mode. Use Display Settings to switch between the Screen Calibration modes. We discuss each of the tested Screen Calibration modes below…

 

· Industry Standard Color Gamuts

The OnePlus 7 Pro supports the two most important 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. However, Automatic Color Management provides support for a large number of other Standard and Non-Standard Color Gamuts...

 

· Automatic Color Management

Most Smartphones and Tablets generally provide only one to several fixed Color Gamuts. The OnePlus 7 Pro Natural mode has Automatic Color Management that automatically switches to the proper Color Gamut for any displayed image content that has an ICC Profile within the OLED Wide Color Space, so images automatically appear with the correct colors, neither over-saturated or under-saturated. Automatic Color Management with multiple and varying Color Gamuts is a very useful and important state-of-the-art capability that all manufacturers will need to provide in the future.

 

· Very High Contrast Accuracy and Intensity Scale Accuracy

The Intensity Scale (sometimes called the Gray Scale) not only controls the Image and Picture Contrast within all displayed images but it also controls how the Red, Green and Blue primary colors mix to produce all of the on-screen colors. So if the Intensity Scale doesn't accurately follow the Standard that is used to produce virtually all consumer content then the Image Colors, Image Contrast, and their Brightness Intensities will be wrong everywhere in all images. Unfortunately, many manufacturers are quite sloppy with the Intensity Scale on their displays (because it is logarithmic rather than linear).

 

Fortunately, the Intensity Scale for the Natural modes on OnePlus 7 Pro is a close to perfect match of the Intensity Scale Standard, and is Visually Indistinguishable from Perfect. See Figure 3 for a plot of the measured Intensity Scale and the Contrast and Intensity Scale section for the measurements and details.

 

· Peak Brightness that is Independent of the on-screen Image Content

The Average Picture Level (APL) for on-screen image content is the Average Brightness (Luminance) over the entire screen, which varies from 0% for an all Black screen, to100% for an all White screen at Peak Brightness.

 

On almost all existing OLED displays the Peak Brightness (Luminance) changes with the APL of the on-screen image, with the Peak Brightness increasing by up to 50 percent or more between High APL and Low APL. This increasing High Brightness with Low APL effect can be very useful in improving screen readability in High Ambient Light, and also to highlight certain on-screen image content. But the resulting variations in display Brightness can distort the brightness relationships when viewing photos, in videos, and other images, so for display modes that provide High Accuracy the Luminance variation with APL should be as small as possible.

 

On the OnePlus 7 Pro the Luminance variation with picture content APL is a Record Low of 1 to 2 percent for the Accurate Natural modes. But as we discuss next, the actual reason for doing this is to improve the Absolute Color Accuracy and Absolute Contrast Accuracy of the display. See the Screen Brightness section for the measurements and details.

 

· Color Accuracy and Intensity Scales that are Independent of the on-screen Image Content

The Absolute Color Accuracy and Intensity Scale of the display should not change as the on-screen image content changes.

As we discussed above, the first step is to make sure that the Peak Brightness (Luminance) of the display does not change with the Average Picture Level APL of the on-screen images because High Color Accuracy is impossible when that occurs.

 

With the continuing improvements in display performance we have added a new set of advanced tests that measure the variations in the Absolute Color Accuracy and the Intensity Scales with changing Average Picture Level APL, comparing the Shifts between Low APL and 50% High APL. Previous generation displays with large Peak Luminance changes with APL typically show Large Shifts in the Intensity Scale and Large Shifts in Absolute Color Accuracy with APL. Since the OnePlus 7 Pro has a small 1 to 2 percent change in Luminance with APL, we expect Small Shifts in Accuracy with APL, which we analyze next...

 

The Variation in the Intensity Scales between Low APL and 50% APL for the Natural modes is shown Figure 3. Any change in the Intensity Scale will affect the Absolute Color Accuracy. There is effectively No Shift in the Intensity Scales with APL, with a Gamma of 2.20 for Low APL and also 2.20 for 50% APL. As a result, we expect the Absolute Color Accuracy to have very small variations with APL.

 

The Variation in the Absolute Color Accuracy between Low APL and 50% APL for the Natural sRGB and DCI-P3 Modes is shown in Figure 4. The Color Shifts with APL are small, with an Average Color Shift of just 0.3 JNCD and the Largest Color Shift of only 0.6 JNCD for the Natural Modes. In addition, the White Point Shifts with APL are also just 0.3 JNCD.

 

All the Color Shifts and Contrast Shifts with APL are very small and Visually Indistinguishable from Perfect. See this Figure for an explanation and visual definition of JNCD and the Color APL Shifts section for the measurements and details.

 

 

 

 

 

 

 

 

 

 

 

 

 

Color Gamuts

Click to Enlarge

 

Color Accuracy

Click to Enlarge

 

Color Shifts

Click to Enlarge

 

Intensity Scales

Click to Enlarge

 

· Natural Mode with Very High Absolute Color Accuracy

Delivering great color with high Absolute Color Accuracy is incredibly difficult because everything on the display has to be done just right. In order to deliver accurate image colors, a display needs to closely match the standard Color Gamut that was used for producing the content being viewed – not more and not less. In addition the display also needs an accurate (pure logarithmic power-law) Intensity Scale, and particularly important is a very accurate White Point.

 

The Natural mode has ICC Color Management that automatically switches to the appropriate Color Gamut Standard for the current on-screen content.

 

The Absolute Color Accuracy of the Natural mode is Truly Impressive as shown in these Figures. It has an Absolute Color Accuracy of 0.6 JNCD (Just Noticeable Color Difference) for the sRGB / Red.709 Color Gamut that is used for most current consumer content, and 0.8 JNCD for the Wider DCI-P3 Color Gamut that is used for 4K UHD TVs and Digital Cinema, which are both Visually Indistinguishable From Perfect, and very likely considerably better than any mobile display, monitor, TV or UHD TV that you have.

 

Note that in order to obtain this High Absolute Color Accuracy the Screen Calibration mode must be set to Natural in Display Settings, and the Night mode must also be Off because it changes the White Point of the display from the 6500 K Standard, which then changes the Absolute Color Accuracy throughout the Color Gamut. See this Figure for an explanation and visual definition of Just Noticeable Color Difference JNCD and the Color Accuracy Plots with 41 Reference Colors showing the measured display Color Errors. See the Color Accuracy section and the Color Accuracy Plots for the measurements and details. Select the Natural mode using Display Settings – it is Not the default Screen Calibration mode for the OnePlus 7 Pro.

 

· Vivid Mode with Vibrant Colors and Contrast

The Vivid mode provides more Vibrant Colors and Higher Image Contrast than the Natural mode by using the wider DCI-P3 Color Gamut together with a steeper Intensity Scale that increases the Color Saturation for all image and picture content. Some people like the more Saturated and Vibrant Colors, plus it is useful for special applications, and especially when using the OnePlus 7 Pro in medium to high levels of Ambient Light, because it offsets some of the reflected light glare that washes out the on-screen image colors. We examine the change in the Color Gamut with Ambient Light below. Select the Vivid mode using Display Settings – it is the factory default Screen Calibration mode for the OnePlus 7 Pro.

 

· Advanced AMOLED Wide Gamut Mode

The Advanced AMOLED Wide Gamut mode has the Wide Native OLED Color Gamut. It provides significantly higher Color Saturation, with a large 140 percent of the Standard sRGB / Rec.709 Color Gamut and 111 percent of the Standard DCI-P3 Color Gamut, the highest that we have ever measured for Smartphones and Tablets.

 

Some people like the more saturated and Vibrant Colors, plus it is useful for special applications, and especially when using the OnePlus 7 Pro in medium to high levels of Ambient Light, because it offsets some of the reflected light glare that washes out the on-screen image colors. We examine the change in the Color Gamut with Ambient Light below. See the Color Accuracy section for the measurements and details. Select the Advanced AMOLED Wide Gamut mode using Display Settings – it is Not the factory default Screen Calibration mode for the OnePlus 7 Pro.

 

· Advanced Screen Calibration Modes with a User Adjustable White Point

The default White Point for the Advanced Screen Calibration modes have a somewhat Bluish 7,400 K Color Temperature. For the Advanced modes, the OnePlus 7 Pro has a user adjustable White Point slider that allows users to change color of White. The slider control allows the White Point Color Temperature to range from 5,500 K, which has a somewhat Warmer tint than the Standard D65 White, and up to 9,360 K, which has a Bluish (Cold) Tint that some people like. So with the OnePlus 7 Pro you can set the Color of White that you prefer.

 

· Advanced AMOLED Wide Gamut Mode Offsets the Loss of Color Saturation and Color Gamut in Ambient Light

The Advanced AMOLED Wide Gamut mode is particularly useful in moderate to high levels of Ambient Light because its larger Native Color Gamut offsets some of the loss of Color Saturation and Color Gamut that occurs when using the other Accurately Calibrated Standard Screen Calibration modes. This Figure shows the measured decrease in the Natural modes with increasing Ambient Light, from 0 lux, which is perfectly dark, up through 2,000 lux, which corresponds to typical outdoor daylight in shade.

 

At 500 lux, which corresponds to typical office lighting, the measured on-screen Color Gamut for the Natural modes decreases to 88%. At 1,000 lux, which corresponds to very bright indoor lighting or outdoor daylight with an overcast sky, the measured on-screen Color Gamut decreases down to 77%, and at 2,000 lux the measured on-screen Color Gamut falls to 61%. This loss of Color Saturation and wash out in Ambient Light is well known to all display users.

 

The way to improve the display color accuracy and performance in Ambient Light is to start with a larger Color Gamut, like the AMOLED Wide Gamut mode, which is shown in this Figure compared to the Natural modes for 0 lux up through 2,000 lux. At 1,000 lux the AMOLED Wide Gamut mode provides a much better match to the sRGB / Rec.709 Color Gamut than the sRGB Natural mode. The AMOLED Wide Gamut mode also provides a good match to the DCI-P3 Color Gamut at 500 lux. So the AMOLED Wide Gamut mode provides more accurate on-screen colors in moderate to high Ambient Lighting than the Calibrated Natural Modes, which are designed and calibrated for Low Ambient Light. Applying Dynamic Color Management based on the current Ambient Light lux level in the future will able to further improve color accuracy over a wide range of Ambient Light levels, which we discuss further in the Improving Display Performance for Real World Ambient Light section in the Conclusion.

 

· High Screen Brightness and Performance in High Ambient Light

Mobile displays are often used under relatively bright Ambient Light, which washes out the image color saturation and contrast, reducing picture quality and making it harder to view or read the screen. To be usable in High Ambient Light a display needs a dual combination of high Screen Brightness and low Screen Reflectance – the OnePlus 7 Pro has both. This is extremely important for screen readability, picture quality, and color accuracy in Ambient Light.

 

With Automatic Brightness turned Off and the Brightness slider set Manually to Maximum, the OnePlus 7 Pro produces between 401 cd/m2 and 526 cd/m2 (nits), based on the Screen Calibration mode and the Average Picture Level APL of the image content, among the brightest that we have ever measured for a Smartphone with Automatic Brightness turned Off. See the Screen Brightness section for the measurements and details.

 

The measured Screen Reflectance is 4.6 percent, very close to the lowest that we have ever measured for a Smartphone. Our Contrast Rating for High Ambient Light quantitatively measures screen visibility and image contrast under bright Ambient Lighting – the higher the better. As a result of its high Brightness and low Reflectance, the OnePlus 7 Pro has a Contrast Rating for High Ambient Light that ranges from 87 to 114, among the highest that we have ever measured for a Smartphone. See the Screen Reflectance section for the measurements and details.

 

· High Brightness Mode with Automatic Brightness On

On the OnePlus 7 Pro the Maximum Screen Brightness can go much higher when Automatic Brightness is turned On, so that users can’t permanently park the Manual Brightness slider to very high values, which would run down the battery quickly. High Screen Brightness is only needed for High Ambient Light, so turning Automatic Brightness On will provide better high Ambient Light screen visibility and also longer battery running time.

 

When Automatic Brightness is turned On, the OnePlus 7 Pro has a High Brightness Mode that produces between 583 cd/m2 and 813 cd/m2 (nits) in High Ambient Light, which is where high Brightness is really needed, and is considerably Brighter than with Manual Brightness when Automatic Brightness is turned Off.

 

The 583 nits is for an All White Full Screen 100% Average Picture Level APL image, which is the most challenging image for an OLED display because all the pixels are at full power. See the Brightness and Contrast, the High Ambient Light and the Screen Reflections sections for the measurements and details.

 

· High Dynamic Range Mobile HDR10+ Display

The OnePlus 7 Pro can play 4K High Dynamic Range content made for 4K UHD TVs. High Dynamic Range (HDR) is the newest performance enhancement feature developed for the latest 4K Ultra HD TVs. The OnePlus 7 Pro is Certified for the new enhanced Mobile HDR10+ that supports Dynamic Metadata and Dynamic Tone Mapping.

 

HDR provides expanded Color, Contrast, and Brightness of video content. In order to provide HDR, the OnePlus 7 Pro has the required Digital Cinema DCI-P3 Wide Color Gamut, plus perfect Blacks and an Infinite Contrast Ratio from its OLED display, and a peak Brightness of over 540 nits that is needed for High Dynamic Range. The OnePlus 7 Pro can play the latest streamed mobile HDR videos.

 

· Viewing Angle Performance

While Smartphones are primarily single viewer devices, the variation in display performance with viewing angle is still very important because single viewers frequently hold the display at a variety of viewing angles. The angle is often up to 30 degrees, more if the phone is resting on a table or desk.

 

While LCDs typically experience a 55 percent or greater decrease in Brightness at a 30 degree Viewing Angle, the OLED OnePlus 7 Pro display shows a much smaller 22 percent decrease in Brightness at 30 degrees. This also applies to multiple side-by-side viewers as well, and is a significant advantage of OLED displays.

 

All displays have Color Shifts with Viewing Angle:

The Color Shift of White, which is the most common background color is particularly noticeable on many OLED and LCD displays.

The OnePlus 7 Pro has a small White Shift of just 2.2 JNCD at 30 degrees, which is unlikely to be noticeable.

 

The Color Shifts throughout the entire Color Gamut vary as combinations of the Primary Color Shifts. The Color Shifts for the Red and Green Primaries are both small, with 2.3 JNCD for Red and 1.6 JNCD for Green at 30 degrees. The Color Shift for the Blue Primary is larger at 5.9 JNCD at 30 degrees, which may be noticeable for some color content. See the Viewing Angles section for the measurements and details.

 

But as explained in our Absolute Color Accuracy Display Technology Shoot-Out article, the color accuracy of Blue Region covering the entire range from Cyan to Magenta is generally less critical for visual color accuracy. While the eye can still detect color differences and color errors in the Blue Region, for the most part we are less likely to notice or be troubled by color differences and discrepancies with colors in the Blue Region. So a larger Blue Color Shift is less noticeable than the larger Red and Green Color Shifts found in most Smartphone displays, including all of the other current Top Tier Smartphone Displays. See the Viewing Angles section for the measurements and details.

 

· Night Mode with Reduced Blue Light for Better Night Viewing

The Night mode on the OnePlus 7 Pro is designed to change the color balance of the display in order to reduce the amount of Blue Light produced by the display, which some recent research indicates can affect how well users sleep afterwards. In a separate article we explain and analyze the Blue Light issue for displays. The OnePlus 7 Pro includes a user adjustable Color Temperature slider to vary the amount of Blue light produced by the display and a timer that allows the Night mode to be turned on and off automatically every day. The measured variation in the display light spectrum with the adjustable Color Temperature slider is shown in this Figure and below.

 

As the Night mode Color Temperature slider setting is moved to the Warmest setting, the amount of Blue light emitted by the display decreases. When that happens, White and all screen colors take on an increasing yellowish tint and color cast. At the Middle setting the measured White Color Temperature decreases to 4,100 K, and at the Warmest setting it decreases to 2,730 K, the Color Temperature of traditional incandescent lighting, which is yellowish.

 

With the Night mode turned On and at its Warmest slider setting, the Blue Light is reduced by up to 85 percent. This results from reducing in the Blue Spectrum component by 60 percent and reducing the Brightness by another 60 percent with the Night mode Lightness slider. The OnePlus 7 Pro display has also received the Safety for Eyes certification from the VDE Testing and Certification Institute for its ability to filter out potentially harmful Blue Light. The measured display spectra for several of the Night mode settings are included in this Figure and below.

 

 

 

Display Spectra

Click to Enlarge

 

· Super Dim Setting

The OnePlus 7 Pro also has a Super Dim Setting that allows the Maximum Screen Brightness to be set all the way down to just 2 cd/m2 (nits) using the Brightness Slider. This is perfect for night use on a beside table, and useful for working comfortably without eye strain or bothering others in very dark environments, or affecting the eye’s dark adaptation, such as when using a telescope. The display still provides full 24-bit color and the picture quality remains excellent.

 

· Diamond Sub-Pixels

A Diamond Sub-Pixel layout is used on most Smartphone OLED displays rather than an RGB Stripe pattern that is used for most LCDs. The Red, Green, and Blue sub-pixels have very different sizes -- Blue is by far the largest because it has the lowest light emission efficiency, and Green is by far the smallest because it has the highest efficiency. The alternating Red and Blue sub-pixel arrangement leads to a 45 degree diagonal symmetry in the sub-pixel layout. This allows vertical, horizontal, and particularly diagonal line segments and vectors to be drawn with reduced aliasing and artifacts. In order to maximize the sub-pixel packing and achieve the highest possible pixels per inch (ppi), that leads to a Diamond rather than Square or Striped arrangement of the Sub-Pixels.

 

· Viewing Tests Performance

The Natural mode on the OnePlus 7 Pro provides very nice, pleasing and Very Accurate Colors and Picture Quality. The very challenging set of DisplayMate Test and Calibration Photos that we use to evaluate picture quality looked absolutely stunning and Beautiful, even to my experienced hyper-critical eyes.

 

The Absolute Color Accuracy on the OnePlus 7 Pro is 0.8 JNCD, which is Visually Indistinguishable From Perfect, and almost certainly considerably better than your existing Smartphone, living room HDTV, Tablet, Laptop, and computer monitor, as demonstrated in our extensive Absolute Color Accuracy Lab Measurements.

 

In order to see the OnePlus 7 Pro High Color Accuracy, the Display Setting needs to be set to the Natural mode, which Automatically Switches to the proper Gamut for the current on-screen content.

 

For indoor and low ambient light viewing use the Natural mode for most standard consumer content including digital camera, TV, internet, and computer content, including photos, videos, and movies, and also for your online purchases in order to see accurate product colors, and also for viewing the newest DCI 4K Ultra HD TV and Digital Cinema content and videos, including HDR content.

 

The Vivid mode and Advanced AMOLED Wide Gamut mode provide significantly more Vibrant and Saturated Colors, which some people prefer. They are recommended for viewing in medium to high levels of ambient light because it offsets some of the reflected light glare that washes out the image colors, which is demonstrated in this Figure for ambient light levels up through 2,000 lux.

 

· Display Power Efficiency

While LCDs remain more power efficient for images with mostly full screen white content (like all text screens on a white background, for example), OLEDs are more power efficient for typical mixed image content because they are emissive displays so their power varies with the Average Picture Level (average Brightness) of the image content over the entire screen.

 

For LCDs the display power is fixed and independent of the image content. But for OLEDs, the display power decreases with the type of image content. Black pixels and sub-pixels don’t use any power so screens with Black or dark backgrounds are very power efficient for OLEDs. Photos and videos also have relatively low Average Picture Levels and so require much less power on OLEDs than LCDs. Currently, OLED displays are more power efficient than LCDs for Average Pictures Levels of 70 percent or less, and LCDs are more power efficient for Average Picture Levels above 70 percent. Since both technologies are continuing to improve their power efficiencies, the crossover will continue to change with time. See the Display Power section for the measurements and details.

 

· Display Related Enhancements

 

· The OnePlus 7 Pro can be used with Polarized Sunglasses in both the Portrait and Landscape orientations unlike LCDs, which generally work in only one of the two orientations.

 

· The OnePlus 7 Pro has Gorilla Glass 5, which provides high resistance to breakage.

 

 

 

 

 

 

 

 

 

Color Gamuts

Click to Enlarge

 

Color Accuracy

Click to Enlarge

 

Color Shifts

Click to Enlarge

 

Intensity Scales

Click to Enlarge

 

Display Spectra

Click to Enlarge

 

 

 

OnePlus 7 Pro Conclusions:   A Record Setting Impressive Smartphone Display…

The primary goal of this Display Technology Shoot-Out article series has always been to publicize and promote display excellence so that consumers, reviewers, journalists and even manufacturers are aware of and appreciate the very best in displays and display technology. We point out which manufacturers and display technologies are leading and advancing the state-of-the-art for displays by performing comprehensive and objective scientific Lab Tests and Measurements together with in-depth analysis. We point out who is leading, who is behind, who is improving, and sometimes (unfortunately) who is back pedaling… all based solely on the extensive objective precise Lab measurements that we also publish, so that everyone can judge the data for themselves as well.

 

With consumers now spending rapidly increasing amounts of time watching content on their Smartphones, the shift in emphasis from primarily improving Display Hardware Performance to enhancing the overall Display Picture Quality and Color Accuracy is an important step that DisplayMate Technologies has been pushing for many years in our Display Technology Shoot-Out article series, so it is great to see manufactures improving and then competing on these metrics.

 

Summary of the OnePlus 7 Pro Display Functions, Features, and Performance Records:

The OnePlus 7 Pro has many major and important state-of-the-art Display Performance Functions and Features, and many new Display Performance Records that are listed below.

 

See the Display Shoot-Out Lab Measurements Comparison Table section for the complete set of detailed DisplayMate Lab measurements and tests.

 

See the Highlights and Performance Results section for a detailed overview with expanded discussions and explanations.

 

See the Display Assessments section for the Evaluation details.

 

The OnePlus 7 Pro has the following State-of-the-Art Display Performance Functions and Features:

 

· A Curved Screen Flexible OLED display that is manufactured on a flexible plastic substrate so that it can bend around corners on both sides of the phone to provide two curved Edge Display areas that can be viewed and controlled from both the front or the sides. While the OLED display itself is flexible, the screen remains rigid under an outer hard cover glass.

 

· A Full Screen design with a large 6.67 inch OLED display that fills the entire front face of the OnePlus 7 Pro from edge-to-edge, providing a significantly larger display for the size of the phone.

 

· A 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. This provides extra space for Notifications and for displaying multiple Apps and content simultaneously on-screen side-by-side.

 

· 3K High Resolution 3120 x 1440 Full HD+ Display with 516 pixels per inch, and Diamond Sub-Pixels with Sub-Pixel Rendering for enhanced sharpness and higher Peak Brightness.

 

· The OnePlus 7 Pro display appears Perfectly Sharp for normal 20/20 Vision at Typical Smartphone Viewing Distances of 10 to 18 inches (25 to 46 cm).

 

· Very Low Screen Reflectance of 4.6 percent.

 

· Image Luminance that is Independent of the on-screen Image Content.

 

· High Brightness Mode with 100% APL Full Screen Peak Display Brightness of 583 nits, which significantly improves screen visibility in very high Ambient Light, and also provides the high screen Brightness needed for HDR.

.

· Very High Absolute Color Accuracy (0.8 JNCD) that is Visually Indistinguishable From Perfect.

 

· Very High Image and Picture Contrast Accuracy and Intensity Scale Accuracy (2.20 Gamma) that is Visually Indistinguishable From Perfect.

 

· Color Accuracy and Intensity Scales that are Independent of the Image Content.

 

· Automatic Color Management that automatically switches to the proper Color Gamut for any displayed image content that has an ICC Profile within the OLED Wide Color Space, so images automatically appear with the correct colors, neither over-saturated or under-saturated.

 

· 2 Industry Standard Calibrated 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.

 

· 5 Selectable Screen Calibration modes that provide user control of the color from the Accurate Natural Mode to the Vivid and AMOLED Wide Gamut modes.

 

· A full 100% DCI-P3 Color Gamut with the Natural mode that is also used for 4K Ultra HD TVs, so the OnePlus 7 Pro can display the latest high-end 4K video content. The DCI-P3 Gamut is 26 percent larger than the Rec.709 Gamut that is used in 2K Full HD TVs.

 

· A large Native Color Gamut with a very impressive 111% of DCI-P3 and 140% of sRGB / Rec.709 Gamuts that also provides much better on-screen Colors in High Ambient Light.

 

· The OnePlus 7 Pro display has received the Safety for Eyes certification from the VDE Testing and Certification Institute for its ability to filter out potentially harmful Blue Light.

 

· A Night 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 High Dynamic Range Mobile HDR10+ Display that allows the OnePlus 7 Pro to play 4K High Dynamic Range content produced for 4K UHD TVs. The OnePlus 7 Pro is Certified for the new enhanced Mobile HDR10+ that supports Dynamic Metadata and Dynamic Tone Mapping.

 

· A user Adjustable White Point with a slider control that can change the color of White for the Advanced modes.

 

· Small Color Shifts and Brightness Shifts with Viewing Angle, particularly White, which is the most common background color.

 

· The OnePlus 7 Pro can be used with Polarized Sunglasses in both the Portrait and Landscape orientations unlike LCDs, which generally work in only one of the two orientations.

 

· A strong curved Gorilla Glass 5 protecting the display.

 

The OnePlus 7 Pro matches or sets 10 Smartphone Display Performance Records for:

 

· Highest  Absolute Color Accuracy  (0.8 JNCD)  –  Visually Indistinguishable From Perfect.

 

· Highest  Image Contrast Accuracy and Intensity Scale Accuracy  (2.20 Gamma)  –  Visually Indistinguishable From Perfect.

 

· Smallest  Change in Peak Brightness with the Image Content APL  (1 percent)  –  Visually Indistinguishable From Perfect.

 

· Smallest  Shift in Color Accuracy with the Image Content APL  (0.3 JNCD)  –  Visually Indistinguishable From Perfect.

 

· Smallest  Shift in Image Contrast and Intensity Scale with the Image Content APL  (0.00)  –  Visually Indistinguishable From Perfect.

 

· Largest  Native Color Gamut  (111% DCI-P3 and 140% sRGB / Rec.709).

 

· Highest  Contrast Ratio  (Infinite).

 

· Lowest  Screen Reflectance  (4.6 percent).

 

· Smallest  Brightness Variation with Viewing Angle  (22 percent at 30 degrees).

 

· Highest  Visible Screen Resolution 3K (3120x1440)  –  4K Does Not Appear Visually Sharper on a Smartphone.

 

The OnePlus 7 Pro earns our Highest A+ Display Rating

The OnePlus 7 Pro has a Very Impressive Excellent World Class Smartphone Display that has earned our Highest Overall Assessment Display Rating of A+.

 

The OnePlus 7 Pro is one of the most innovative and high performance Smartphone displays that we have ever Lab tested, setting or matching 10 Smartphone Display Performance Records that are listed above.

 

The OnePlus 7 Pro delivers uniformly consistent all around Top Tier display performance and receives All Green (Very Good to Excellent) Ratings in all but one of the DisplayMate Lab Test and Measurement Categories: Yellow (Good) for the Color Shift of Blue at 30 degrees Viewing Angle of 5.9 JNCD. But note that Blue Region Color Shifts are less visually noticeable than the Red and Green Color Region Shifts found in most Smartphone displays, including all of the other current Top Tier Smartphone Displays (below). See the Viewing Angle section for details.

 

DisplayMate Best Smartphone Display Award for the OnePlus 7 Pro

The OnePlus 7 Pro has a very impressive Top Tier Smartphone Display with Close to Text Book Perfect Calibration Accuracy and Performance that is Visually Indistinguishable From Perfect. Based on our extensive Lab Tests and Measurements the OnePlus 7 Pro receives a DisplayMate Best Smartphone Display Award earning DisplayMate’s highest ever Overall Display Assessment Grade of A+ by providing considerably better display performance than other competing Smartphones. This demonstrates that OnePlus recognizes the importance of Display Excellence and has made a major commitment to improving Smartphone Display Performance.

 

OnePlus Joins the Top Tier of Smartphone Displays

The OnePlus 7 Pro joins the very select Top Tier of Smartphone Displays that includes the Samsung Galaxy S10, the Apple iPhone XS Max, and Google Pixel 3 XL which all provide Close to Text Book Perfect Calibration Accuracy and Performance that is Visually Indistinguishable From Perfect, so they all received and maintain Concurrent DisplayMate Best Smartphone Display Awards. All are Excellent State-of-the-Art Displays, each is better in some Display Performance Categories, but None are Best in All the Display Performance Categories. Note that measured numerical display performance differences that are Visually Indistinguishable are equivalent.

 

As Display Performance continues to improve we have and will continue to raise the Performance Levels necessary to receive a DisplayMate Best Smartphone Display Award and an A+ Display Rating, so the Top Tier of Smartphone Displays will continue to evolve and change with each new display generation.

 

OLED displays now have tremendous performance advantages over LCDs, so high-end and flagship Smartphones need OLED displays in order to compete at state-of-the-art performance levels, securing OLED as the definitive premier display technology for Top Tier Smartphones in the foreseeable future over the next 3-5 years. With the continuing improvements in OLED hardware performance, picture quality, and precision accuracy, it will be much harder for new display technologies to challenge OLED.

 

Follow DisplayMate on Twitter to learn about our upcoming Smartphone display technology coverage.

 

The Future of OLED Smartphones

OLED has evolved into a highly refined and mature display technology that now produces the best and highest performance displays for Smartphones.

OLED Display Performance continues to provide major Record Setting improvements with each new generation.

 

The OnePlus 7 Pro is the latest in a new generation of OLED Smartphones. OLEDs have now evolved and emerged as the premium mobile Smartphone display technology. More than two dozen manufacturers already make OLED Smartphones, and the new Full Screen Display design using a flexible OLED will be the new Flagship for all the upcoming future Top Tier Smartphones.

 

LCDs are a great cutting edge high performance display technology for Tablets to TVs, but for small handheld Smartphones, OLED displays provide a number of major advantages over LCDs including: being much thinner, much lighter, without needing a bezel, providing a rimless edge-to-edge design. They can be made flexible and into curved screens, plus they have a very fast response time, better viewing angles, and an always-on display mode.

 

Many of the OLED performance advantages result from the fact that every single sub-pixel in an OLED display is independently directly electrically powered to emit light, so only the active image sub-pixels draw power based on their individual brightness levels. OLEDs can also provide better color accuracy, image contrast accuracy, and screen uniformity because the irregularities and variations in LCD Backlights introduce color and brightness irregularities and variations over the screen.

 

As the result of their very versatile power management capabilities, OLEDs are not only more power efficient than LCDs for most image content, but they now deliver much higher peak Brightness than LCDs because the maximum power can be delivered to just the sub-pixels that are needed for producing the current displayed image. However, for mostly all white screen content, LCDs are likely to remain brighter and more power efficient for a while.

 

OLED displays are also manufactured on flexible substrates that can bend, which allows the screens to be curved and rounded and provides a number of innovative new screen geometries. The most popular one is expanding the front main screen so that it extends around to both the right and left sides of the phone by bending around the corners like on the OnePlus 7 Pro.

 

As a result, OLED displays now have tremendous performance advantages over LCDs, so high-end and flagship Smartphones need OLED displays in order to compete at state-of-the-art performance levels, securing OLED as the definitive premier display technology for Top Tier Smartphones in the foreseeable future over the next 3-5 years. With the continuing improvements in OLED hardware performance, picture quality, and precision accuracy, it will be much harder for new display technologies to challenge OLED.

 

The main production and availability issue for the next several years will be that the demand for high performance OLED displays could significantly exceed the manufacturing capacity as we discuss in Flagship 2017 OLED Smartphones.

 

Follow DisplayMate on Twitter to learn about these developments and our upcoming display technology coverage.

 

Improving the Next Generation of Mobile Displays

The OnePlus 7 Pro has a very high resolution 3K 3120x1440 pixel display with 516 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 almost double the pixels, memory, and processing power of the 3120x1440 display on the OnePlus 7 Pro, 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!

 

Improving Display Performance for Real World Ambient Light Viewing Conditions

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…

 

Currently all existing displays are Color and Contrast Accurate only when they are viewed in Absolute Darkness 0 lux. 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, Reduced Color Saturation, and Reduce 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.

 

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… Follow DisplayMate on Twitter to learn about these developments and our upcoming display technology coverage.

 

DisplayMate Display Optimization Technology

All Smartphone, Tablet, Monitor and TV displays can be significantly improved using DisplayMate’s proprietary very advanced scientific analysis and mathematical display modeling and optimization of the display hardware, factory calibration, and driver parameters. We help manufacturers with expert display procurement, prototype development, display performance improvement and optimization, testing displays to meet contract specifications, and production quality control so that they don’t make mistakes similar to those that are exposed in our public Display Technology Shoot-Out series for consumers. This article is a lite version of our advanced scientific analysis – before the benefits of our DisplayMate Display Optimization Technology, which can correct or improve all of these issues. If you are a display or product manufacturer and want to significantly improve display performance for a competitive advantage then Contact DisplayMate Technologies.

 

OnePlus 7 Pro

 

Display Shoot-Out Lab Measurements Comparison Table

Below we examine in-depth the OLED display performance of the OnePlus 7 Pro based on objective Lab measurement data

and criteria in the following sections:  Display SpecificationsOverall AssessmentsScreen ReflectionsBrightness and Contrast,

Colors and IntensitiesAbsolute Color Accuracy,  Viewing AnglesOLED SpectraDisplay Power.

 

For additional background information see this earlier article covering the Flagship OLED 2017 Smartphones.

 

Detailed Test and Measurement Comparisons between the 7 Pro and the iPhone XS Max, Pixel 3 XL, and Galaxy S10 Displays:

You can directly compare the data and measurement results for the 7 Pro with the iPhone XS Max, Pixel 3 XL, and Galaxy S10 displays

in detail by using a Tabbed web browser with our comprehensive Lab Measurements and Analysis for each of the displays.

For each Tab click on a Link below. The entries are mostly identical with only minor formatting differences,

so it is easy to make detailed side-by-side comparisons by simply clicking through the Tabs.

OnePlus 7 Pro Display Lab Measurements Comparison Table

Apple iPhone XS Max Display Lab Measurements Comparison Table

Google Pixel 3 XL Display Lab Measurements Comparison Table

Samsung Galaxy S10 Display Lab Measurements Comparison Table

 

For comparisons with the other leading Smartphone displays see our Mobile Display Technology Shoot-Out series.

 

Categories

 OnePlus 7 Pro

Comments

Display Technology

Flexible OLED Display with Diamond Sub-Pixels

6.67 inch Diagonal  /  16.9 cm Diagonal

Excluding the Rounded Corners

Flexible Organic Light Emitting Diode

Diamond Sub-Pixels with Diagonal Symmetry.

Screen Aspect Ratio

19.5 : 9 = 2.17

New Higher Aspect Ratio

Most Smartphones and Widescreen TVs have 16 : 9 = 1.78

Height to Width Aspect Ratio

OnePlus 7 Pro display screen is 22% longer than most Smartphones and widescreen 16:9 TV content.

Screen Size

        2.79 x  6.05 inches

   7.09 x 15.37 cm

Display Width and Height in inches and cm.

Screen Area

16.9 square inches  /  109.0 square cm

Excluding the Rounded Corners

A better measure of size than the diagonal length.

 

Color Gamut Calibration modes

Vivid mode

  –  Vibrant Colors and Contrast

Natural mode

  –  with Automatic ICC Color Management

Advanced mode

  –  AMOLED Wide, sRGB, Display-P3

 

Natural mode with Automatic Color Management for Content with ICC Color Profiles

Natural DCI-P3 mode 

  –  DCI-P3 Standard Color Gamut

Natural   sRGB mode 

  –  sRGB / Rec.709 Standard Color Gamut

 

The OnePlus 7 Pro supports 2 Standard Color Gamuts including the new wider DCI-P3 Color Gamut that is

used in 4K Ultra HD TV content and the sRGB / Rec.709 that is used for most current consumer content.

 

Display Resolution

3120 x 1440 pixels

3K  Quad HD+

Screen Pixel Resolution.

Quad HD can display four 1280x720 HD images.

Total Number of Pixels

4.5 Mega Pixels

Total Number of Display Pixels.

Pixels Per Inch PPI

516 PPI with Diamond Sub-Pixels

Excellent

Sharpness depends on the viewing distance and PPI.

See this on the visual acuity for a true Retina Display

Sub-Pixels Per Inch

    Red  365 SPPI

 Green  516 SPPI

   Blue  365 SPPI

Diamond Sub-Pixel displays have only half the number of Red and Blue Sub-Pixels as RGB Stripe displays.

See Diamond Sub-Pixels

Total Number of Sub-Pixels

   Red  2.25 Million Sub-Pixels

Green  4.50 Million Sub-Pixels

  Blue  2.25 Million Sub-Pixels

Number of Mega Sub-Pixels for Red, Green, Blue.

Diamond Sub-Pixel displays have only half the number of Red and Blue Sub-Pixels as RGB Stripe displays.

At High PPI this is generally not visible due to the

use of Sub-Pixel Rendering.

20/20 Vision Distance

where Pixels or Sub-Pixels

are Not Resolved

      6.7 inches / 16.9 cm  for White and Green Sub-Pixels with 20/20 Vision

 9.4 inches / 23.9 cm  for Red and Blue Sub-Pixels with 20/20 Vision

For 20/20 Vision the minimum Viewing Distance

where the screen appears perfectly sharp to the eye.

At 10 inches from the screen 20/20 Vision is 344 PPI.

Display Sharpness

at Typical Viewing Distances

 OnePlus 7 Pro Display appears Perfectly Sharp

Pixels are not Resolved with 20/20 Vision

at Typical Viewing Distances of

     10 to 18 inches

25 to 46 cm

The Typical Viewing Distances for this screen size

are in the range of 10 to 18 inches or 25 to 46 cm.

 

Also note that eye’s resolution is much lower for

Red and Blue color content than White and Green.

Appears Perfectly Sharp

at Typical Viewing Distances

 Yes

Typical Viewing Distances are 10 to 18 inches

or 25 to 46 cm for this screen size.

Photo Viewer Color Depth

 Full 24-bit Color

No Dithering Visible

256 Intensity Levels

Some Smartphones and Tablets still have some

form of 16-bit color depth in the Gallery Viewer.

The OnePlus 7 Pro does not have this issue.

 

Overall Assessments

This section summarizes the results for all of the extensive Lab Measurements and Viewing Tests performed on the display.

See  Screen ReflectionsBrightness and ContrastColors and IntensitiesViewing AnglesOLED SpectraDisplay Power.

 

The OnePlus 7 Pro has ICC Color Management that automatically switches to the appropriate Color Gamut for the on-screen content.

 

Here we provide results for the Advanced AMOLED Wide Gamut mode, which has the Native Wide Color Gamut of the OLED display,

the Natural DCI-P3 mode, which is calibrated for the new DCI-P3 Gamut that is used in 4K Ultra HD TVs, and

the Natural sRGB mode, which is calibrated for the sRGB / Rec.709 Gamut that is used for most current

consumer photo, video, web, and computer content.

 

Categories

Advanced mode

AMOLED Gamut

Wide Color Gamut

Natural mode

DCI-P3 Content

Natural mode

sRGB Content

Comments

Viewing Tests

in Subdued Ambient Lighting

 

 

 

 

Very Good Images

Photos and Videos

have Vivid Color

and Accurate Contrast

 

Wide Color Gamut Mode

Intentionally Vivid Colors

Excellent Images

Photos and Videos

have Excellent Color

and Accurate Contrast

 

Accurate DCI-P3 Content

 

Excellent Images

Photos and Videos

have Excellent Color

and Accurate Contrast

 

Accurate sRGB Content

 

The Viewing Tests examine the accuracy of

photographic images by comparing the displays

to a calibrated studio monitor and TV.

 

 

 

 

Variation with Viewing Angle

Colors and Brightness

 

See Viewing Angles

Color Shifts

Very Small to Medium

with Viewing Angle

 

Small Brightness Shifts

with Viewing Angle

Color Shifts

Very Small to Medium

with Viewing Angle

 

Small Brightness Shifts

with Viewing Angle

Color Shifts

Very Small to Medium

with Viewing Angle

 

Small Brightness Shifts

with Viewing Angle

The OnePlus 7 Pro display has a relatively small

decrease in Brightness with Viewing Angle and

relatively small Color Shifts with Viewing Angle.

 

See the Viewing Angles section for details.

Overall Display Assessment

Lab Tests and Measurements

Excellent OLED Display

Wide Color Gamut Mode

Excellent OLED Display

Accurate DCI-P3 Content

Excellent OLED Display

Accurate sRGB Content

The OnePlus 7 Pro OLED Display performed

very well in the Lab Tests and Measurements.

 

Absolute Color Accuracy

Measured over Entire Gamut

 

See Figure 2 and Colors

 Good Color Accuracy

Colors More Saturated

Intentionally Vivid Colors

 

Excellent Color Accuracy

Color Errors are Very Small

Accurate DCI-P3 Content

 

Excellent Color Accuracy

Color Errors are Very Small

Accurate sRGB Content

 

Absolute Color Accuracy is measured with a

Spectroradiometer for 41 Reference Colors

uniformly distributed within the entire Color Gamut.

 

See Figure 2 and Colors for details.

Image Contrast Accuracy

 

See Figure 3 and Contrast

Very Good Accuracy

Image Contrast

Slightly Too High

Excellent Accuracy

Image Contrast

Very Accurate

Excellent Accuracy

Image Contrast

Very Accurate

The Image Contrast Accuracy is determined by

measuring the Log Intensity Scale and Gamma.

 

See Figure 3 and Contrast for details.

Performance in Ambient Light

Display Brightness

Screen Reflectance

Contrast Rating

 

See Brightness and Contrast

See Screen Reflections

High Display Brightness

Very Low Reflectance

 

High Contrast Rating

for Ambient Light

 

Higher Brightness with

Auto Brightness On

High Display Brightness

Very Low Reflectance

 

High Contrast Rating

for Ambient Light

 

Higher Brightness with

Auto Brightness On

High Display Brightness

Very Low Reflectance

 

High Contrast Rating

for Ambient Light

 

Higher Brightness with

Auto Brightness On

Smartphones are seldom used in the dark.

 

Screen Brightness and Reflectance determine

the Contrast Rating for High Ambient Light.

 

See the Brightness and Contrast section for details.

See the Screen Reflections section for details.

 

Overall Display Calibration

Image and Picture Quality

Lab Tests and Viewing Tests

Intentionally Vivid Colors

Wide Color Gamut Mode

 

Excellent Calibration

Accurate DCI-P3 Content 

 

Excellent Calibration

Accurate sRGB Content

 

OnePlus 7 Pro display has a Natural Mode that

delivers accurately calibrated colors and images

and a Vivid Color Mode that is preferred by

some users and for some applications.

 

Overall Display Grade

Overall Assessment

Overall OnePlus 7 Pro Display Grade is Excellent A+

An Excellent Top Tier World Class Smartphone Display

The OnePlus 7 Pro display delivers excellent image quality, has both Natural Color Accurate modes and a AMOLED Wide Gamut mode with a Wide Color Gamut, has High Screen Brightness and low Reflectance, has good Viewing Angles, and is an all around top performing Smartphone display.

 

 Wide Color Gamut Mode

Also Best for Viewing in

High Ambient Light

 

Accurate DCI-P3 Content

For Viewing 4K UHD TV

DCI-P3 Cinema Content

 

Accurate sRGB mode

For Viewing Most Content

Photo Video Movie Web

Categories

AMOLED Gamut

Wide Color Gamut

Natural mode

DCI-P3 Content

Natural mode

sRGB Content

Comments

 

Screen Reflections

All display screens are mirrors good enough to use for personal grooming – but that is actually a very bad feature…

We measured the light reflected from all directions and also direct mirror (specular) reflections, which are much more

distracting and cause more eye strain. Many Smartphones still have greater than 10 percent reflections that make

the screen much harder to read even in moderate ambient light levels, requiring ever higher brightness settings that

waste precious battery power. Manufacturers should reduce the mirror reflections with anti-reflection coatings and

matte or haze surface finishes.

 

Our Lab Measurements include Average Reflectance for Ambient Light from All Directions and for Mirror Reflections.

We use an Integrating Hemisphere and a highly collimated pencil light beam together with a Spectroradiometer.

Note that the Screen Reflectance is exactly the same for all of the OnePlus 7 Pro Screen Calibration modes.

 

The OnePlus 7 Pro has very close to the lowest Screen Reflectance that we have ever measured for a Smartphone.

These results are extremely important for screen readability, picture quality, and color accuracy in ambient light.

 

Categories

 OnePlus 7 Pro

Comments

Average Screen Reflection

Light From All Directions

4.6 percent

for Ambient Light Reflections

Excellent

Measured using an Integrating Hemisphere and

a Spectroradiometer.

The lowest value we have ever measured

for a Smartphone is 4.3 percent.

Mirror Reflections

Percentage of Light Reflected

 6.2 percent

for Mirror Reflections

Very Good

These are the most annoying types of Reflections.

Measured using a Spectroradiometer and a narrow

collimated pencil beam of light reflected off the screen.

The lowest value we have ever measured

for a Smartphone is 5.4 percent.

 

Brightness and Contrast

The Contrast Ratio is the specification that gets the most attention, but it only applies for low ambient light, which is seldom

the case for mobile displays.

 

Much more important is the Contrast Rating for High Ambient Light, which indicates how easy it is to read the screen under

high ambient lighting and depends on both the Maximum Brightness and the Screen Reflectance. The larger the better.

The display’s actual on-screen Contrast Ratio changes with the Ambient Light lux level and is proportional to the Contrast Rating.

 

Categories

AMOLED Gamut

Wide Color Gamut

Natural mode

DCI-P3 Content

Natural mode

sRGB Content

Comments

Home Screen Peak Brightness

Measured for White

Brightness 474 cd/m2

Very Good

Brightness 422 cd/m2

Very Good

Brightness 422 cd/m2

Very Good

The Peak Brightness for White on the Home Screen.

 

Measured Average Brightness

50% Average Picture Level

Brightness 453 cd/m2

Very Good

Brightness 407 cd/m2

Very Good

Brightness 406 cd/m2

Very Good

This is the Brightness for typical screen content

that has a 50% Average Picture Level.

Measured Full Brightness

100% Full Screen White

Brightness 405 cd/m2

Very Good

Brightness 401 cd/m2

Very Good

Brightness 404 cd/m2

Very Good

This is the Brightness for a screen that is entirely

all white with 100% Average Picture Level.

Measured Peak Brightness

1% Average Picture Level

Brightness 526 cd/m2

Excellent

Brightness 408 cd/m2

Very Good

Brightness 408 cd/m2

Very Good

This is the Peak Brightness for a screen that

has only a tiny 1% Average Picture Level.

Dynamic Brightness

Change in Luminance with

Average Picture Level APL

23 percent Decrease

Intentionally Large

2 percent Decrease

Excellent

1 percent Decrease

Excellent

This is the percent Brightness decrease with APL

Average Picture Level. Ideally should be 0 percent.

 

Low Ambient Light

Lowest Peak Brightness

Super Dimming Mode

Brightness Slider to Minimum

2 cd/m2

For Very Low Light

2 cd/m2

For Very Low Light

2 cd/m2

For Very Low Light

This is the Lowest Brightness with the Slider set to

Minimum. This is useful for working in very dark

environments. Picture Quality remains Excellent.

Black Brightness at 0 lux

at Maximum Brightness Setting

0 cd/m2

Outstanding

0 cd/m2

Outstanding

0 cd/m2

Outstanding

Black Brightness is important for Low Ambient Light,

which is seldom the case for mobile devices.

Contrast Ratio at 0 lux

Relevant for Low Ambient Light

Infinite

Outstanding

Infinite

Outstanding

Infinite

Outstanding

Only relevant for Low Ambient Light,

which is seldom the case for mobile devices.

 

High Brightness Mode

Automatic Brightness in High Ambient Light

Measured High Brightness Mode

50% Average Picture Level

 

High Brightness Mode

665 cd/m2

Excellent

High Brightness Mode

595 cd/m2

Excellent

High Brightness Mode

595 cd/m2

Excellent

This is the Brightness for typical screen content

that has a 50% Average Picture Level.

 

Measured High Brightness Mode

100% Full screen White

 

High Brightness Mode

583 cd/m2

Excellent

High Brightness Mode

587 cd/m2

Excellent

High Brightness Mode

587 cd/m2

Excellent

This is the Brightness for a screen that is entirely

all white with 100% Average Picture Level.

 

Measured High Brightness Mode

1% Average Picture Level

 

High Brightness Mode

813 cd/m2

Excellent

High Brightness Mode

615 cd/m2

Excellent

High Brightness Mode

615 cd/m2

Excellent

This is the Peak Brightness for a screen that

has only a small 1% Average Picture Level.

 

 

High Ambient Light Contrast Rating

Contrast Rating

for High Ambient Light

 

The Higher the Better

for Screen Readability

in High Ambient Light

88 – 114

With Manual Brightness

Very Good

 

127 – 177

High Brightness Mode

Excellent

87 – 89

With Manual Brightness

Very Good

 

 128 – 134

High Brightness Mode

Excellent

 88 – 89

With Manual Brightness

Very Good

 

128 – 134

High Brightness Mode

Excellent

Depends on the Screen Reflectance and Brightness.

Defined as Maximum Brightness / Average Reflectance.

 

The display’s actual on-screen Contrast Ratio

changes with the Ambient Light lux level and

is proportional to the Contrast Rating.

Screen Readability

in High Ambient Light

Very Good  A

With Manual Brightness

 

   Excellent  A+

With Auto Brightness On

Very Good  A

With Manual Brightness

 

    Excellent  A+

With Auto Brightness On

Very Good  A

With Manual Brightness

 

    Excellent  A+

With Auto Brightness On

Indicates how easy it is to read the screen

under High Ambient Lighting. Depends on

both the Screen Reflectance and Brightness.

See High Ambient Light Screen Shots

 

Colors and Intensities

 

 

 

 

 

 

 

 

 

 

 

 

Figure 1

Color Gamuts

Click to Enlarge

 

Figure 2

Color Accuracy

Click to Enlarge

 

Figure 3

Intensity Scales

Click to Enlarge

 

Figure 4

Color Shifts

Click to Enlarge

 

 

The Color Gamut, Intensity Scale, and White Point determine the quality and accuracy of all displayed images and all

the image colors. Bigger is definitely Not Better because the display needs to match all the standards that were used

when the content was produced.

 

The OnePlus 7 Pro Natural mode has ICC Color Management that automatically switches to the appropriate Color Gamut

for the current on-screen content.

 

Categories

AMOLED Gamut

Wide Color Gamut

Natural mode

DCI-P3 Content

Natural mode

sRGB Content

Comments

Color of White

Color Temperature in degrees

 

Measured in the dark at 0 lux

 

See Figure 1

7,407 K

3.5 JNCD from D65 White

 

User Adjustable

from 5,500 K to 9,360 K

White is Somewhat Bluish

Intentionally Bluish Mode

 

6,466 K

0.2 JNCD from D65 White

 

Very Close to Standard

Accurate DCI-P3 Content

 

See Figure 1

6,512 K

0.0 JNCD from D65 White

 

Very Close to Standard

Accurate sRGB Content

 

See Figure 1

D65 with 6,500 K is the standard color of White

for most Consumer Content and needed for

accurate color reproduction of all images.

 

JNCD is a Just Noticeable Color Difference.

White Point accuracy is more critical than other colors.

 

See Figure 1 for the plotted White Points.

See Figure 2 for the definition of JNCD.

Color Gamut

Measured in the dark at 0 lux

 

See Figure 1

111 percent

DCI-P3 Cinema Gamut

Intentionally Vivid Colors

Wide Color Gamut Mode

 

140 percent

sRGB / Rec.709 Gamut

Intentionally Vivid Colors

Wide Color Gamut Mode

 

See Figure 1

 

101 percent

DCI-P3 Cinema Gamut

Very Close to Standard

Accurate DCI-P3 Content

 

See Figure 1

102 percent

sRGB / Rec.709 Gamut

Very Close to Standard

Accurate sRGB Content

 

See Figure 1

Most current consumer content uses sRGB / Rec.709.

The new 4K UHD TVs and Digital Cinema use DCI-P3.

 

A Wide Color Gamut is useful in High Ambient Light

and for some applications. It can be used with Color

Management to dynamically change the Gamut.

 

See Figure 1

 

Absolute Color Accuracy

Absolute Color Accuracy

Average Color Error at 0 lux

 

For 41 Reference Colors

Just Noticeable Color Difference

 

See Figure 2

Average Color Error

From sRGB / Rec.709

Δ(u’v’) = 0.0326

8.1 JNCD

Intentionally Vivid Colors

Wide Color Gamut Mode

 

See Figure 2

Average Color Error

From DCI-P3

Δ(u’v’) = 0.0032

0.8 JNCD

Excellent Accuracy

Accurate DCI-P3 Content

 

See Figure 2

 Average Color Error

From sRGB / Rec.709

Δ(u’v’) = 0.0026

 0.6 JNCD

Excellent Accuracy

Accurate sRGB Content

 

See Figure 2

 

JNCD is a Just Noticeable Color Difference.

 

See Figure 2 for the definition of JNCD and for the

Accuracy Plots showing the measured Color Errors.

 

Color Errors below 3.5 JNCD are Very Good.

Color Errors  3.5 to 7.0 JNCD are Good.

Color Errors above 7.0 JNCD are Poor.

Absolute Color Accuracy

Largest Color Error at 0 lux

 

For 41 Reference Colors

Just Noticeable Color Difference

 

See Figure 2

Largest Color Error

From sRGB / Rec.709

Δ(u’v’) = 0.0668

16.7 JNCD

for 75% Red

Intentionally Vivid Colors

Wide Color Gamut Mode

 

See Figure 2

Largest Color Error

From DCI-P3

Δ(u’v’) = 0.0081

2.0 JNCD

for 25% Blue

Excellent Accuracy

Accurate DCI-P3 Content

 

See Figure 2

 Largest Color Error

From sRGB / Rec.709

Δ(u’v’) = 0.0081

2.0 JNCD

for 100% Magenta-Red

Excellent Accuracy

Accurate sRGB Content

 

See Figure 2

 

JNCD is a Just Noticeable Color Difference.

 

See Figure 2 for the definition of JNCD and for the

Accuracy Plots showing the measured Color Errors.

 

Color Errors below 3.5 JNCD are Very Good.

Color Errors  3.5 to 7.0 JNCD are Good.

Color Errors above 7.0 JNCD are Poor.

 

Changes of Absolute Color Accuracy with Average Picture Level APL

Measured Shifts in the Absolute Color Accuracy with Image Content from Low 1% APL to High 50% APL

Shift in the Color of White

 

Just Noticeable Color Difference

 

See Figure 4

AMOLED Wide Gamut

 

Intentionally Variable

 

 

 

 

White Point Color Shift

from Low to High APL

Δ(u’v’) = 0.0011

0.3 JNCD

Excellent

 

See Figure 4

White Point Color Shift

from Low to High APL

Δ(u’v’) = 0.0010

0.3 JNCD

Excellent

 

See Figure 4

JNCD is a Just Noticeable Color Difference

 

See Figure 2 for the definition of JNCD.

See Figure 4 for the measured Color Shifts.

 

Color Shifts below 3.5 JNCD are Very Good.

Color Shifts  3.5 to 7.0 JNCD are Good.

Color Shifts above 7.0 JNCD are Poor.

Average Color Shift

 

For 41 Reference Colors

Just Noticeable Color Difference

 

See Figure 4

AMOLED Wide Gamut

 

Intentionally Variable

 

 

 

 

Average Color Shift

from Low to High APL

Δ(u’v’) = 0.0011

0.3 JNCD

Excellent

 

See Figure 4

Average Color Shift

from Low to High APL

Δ(u’v’) = 0.0014

0.3 JNCD

Excellent

 

See Figure 4

JNCD is a Just Noticeable Color Difference.

 

See Figure 2 for the definition of JNCD.

See Figure 4 for the measured Color Shifts.

 

Color Shifts below 3.5 JNCD are Very Good.

Color Shifts  3.5 to 7.0 JNCD are Good.

Color Shifts above 7.0 JNCD are Poor.

Largest Color Shift

 

For 41 Reference Colors

Just Noticeable Color Difference

 

See Figure 4

AMOLED Wide Gamut

 

Intentionally Variable

 

 

 

 

Largest Color Shift

from Low to High APL

Δ(u’v’) = 0.0023

0.6 JNCD

for 50% Yellow-Red

Excellent

 

See Figure 4

Largest Color Shift

from Low to High APL

Δ(u’v’) = 0.0024

0.6 JNCD

for 75% Magenta-Red

Excellent

 

See Figure 4

JNCD is a Just Noticeable Color Difference

 

See Figure 2 for the definition of JNCD.

See Figure 4 for the measured Color Shifts.

 

Color Shifts below 3.5 JNCD are Very Good.

Color Shifts  3.5 to 7.0 JNCD are Good.

Color Shifts above 7.0 JNCD are Poor.

 

Intensity Scale and Image Contrast Accuracy

Dynamic Brightness

Change in Luminance with

Average Picture Level APL

23 percent Decrease

Intentionally Large

2 percent Decrease

Excellent

1 percent Decrease

Excellent

This is the percent Brightness decrease with APL

Average Picture Level. Ideally should be 0 percent.

Intensity Scale and

Image Contrast

 

See Figure 3

Smooth and Straight

Very Good

Slightly Too Steep

 

See Figure 3

Very Smooth and Straight

Excellent

Very Accurate

 

See Figure 3

Very Smooth and Straight

Excellent

Very Accurate

 

See Figure 3

The Intensity Scale controls image contrast needed

for accurate Image Contrast and Color reproduction.

See Figure 3

Gamma for the Intensity Scale

Larger has more Image Contrast

 

See Figure 3

2.36

Very Good

Gamma Slightly Too High

2.20

Excellent

Gamma Very Accurate

 2.20

Excellent

Gamma Very Accurate

Gamma is the log slope of the Intensity Scale.

Gamma of 2.20 is the standard and needed for

accurate Image Contrast and Color reproduction.

See Figure 3

 

Image Contrast Accuracy

Very Good

Excellent

Excellent

See Figure 3

 

 

Viewing Angles

The variation of Brightness, Contrast, and Color with Viewing Angle is especially important for Smartphones because

of their larger screen and multiple viewers. The typical manufacturer 176+ degree specification for LCD Viewing Angle

is nonsense because that is where the Contrast Ratio falls to a miniscule 10. For most LCDs there are substantial

degradations at less than ±30 degrees, which is not an atypical Viewing Angle for Smartphones and Tablets.

 

The Viewing Angle variations are essentially identical for all of the OnePlus 7 Pro Screen Calibration modes.

 

The Viewing Angle performance is also very important for a single viewer because the Viewing Angle can vary

significantly based on how the Smartphone is held. The Viewing Angle can be very large if resting on a table or desk.

 

The OnePlus 7 Pro display has a Brightness (Luminance) fall off with Viewing Angle that is much smaller than the best LCD displays.

 

The White Point Color Shift is the most viewer noticeable Color Shift with Viewing Angle because it is often the screen background.

 

Blue Color Shifts are less visually noticeable than the larger Red and Green Color Shifts found in most Smartphone displays,

including all of the other current Top Tier Smartphone Displays. See the Viewing Angle section for details.

 

Categories

AMOLED Gamut

Wide Color Gamut

Natural mode

DCI-P3 Content

Natural mode

sRGB Content

Comments

Brightness Decrease

at a 30 degree Viewing Angle

22 percent Decrease

Small Decrease

Very Good

Most screens become less bright when tilted.

LCD decrease is generally greater than 50 percent.

Contrast Ratio at 0 lux

at a 30 degree Viewing Angle

Infinite Contrast Ratio

Outstanding

A measure of screen readability when the screen

is tilted under low ambient lighting.

 

White Point Color Shift

at a 30 degree Viewing Angle

Small Color Shift

Δ(u’v’) = 0.0089

 2.2 JNCD  Very Good

JNCD is a Just Noticeable Color Difference.

See Figure 2 for the definition of JNCD.

Color Shifts below 3.5 JNCD are Very Good.

 

Color Shifts for the Primaries

Red Primary Color Shift

at a 30 degree Viewing Angle

Small Color Shift

Δ(u’v’) = 0.0092

 2.3 JNCD  Very Good

JNCD is a Just Noticeable Color Difference.

See Figure 2 for the definition of JNCD.

Color Shifts below 3.5 JNCD are Very Good.

Green Primary Color Shift

at a 30 degree Viewing Angle

Small Color Shift

Δ(u’v’) = 0.0063

 1.6 JNCD  Excellent

JNCD is a Just Noticeable Color Difference.

See Figure 2 for the definition of JNCD.

Color Shifts below 3.5 JNCD are Very Good.

Blue Primary Color Shift

at a 30 degree Viewing Angle

Medium Color Shift

Δ(u’v’) = 0.0234

 5.9 JNCD  Good

JNCD is a Just Noticeable Color Difference.

See Figure 2 for the definition of JNCD.

Color Shifts below 3.5 JNCD are Very Good.

 

Color Shifts for Color Mixtures

at a 30 degree Viewing Angle

Reference Brown (255, 128, 0)

 Small Color Shift

Δ(u’v’) = 0.0020

0.5 JNCD  Excellent

JNCD is a Just Noticeable Color Difference.

Color Shifts for non-IPS LCDs are about 10 JNCD.

Reference Brown is a good indicator of color shifts

with angle because of unequal drive levels and

roughly equal luminance contributions from Red

and Green. See Figure 2 for the definition of JNCD.

 

 

Display Spectra

The Display Spectra for the Screen Calibration modes and for the Night mode are measured in Figure 5 below.

 

The Night mode is designed to change the color balance of the display in order to reduce the amount of Blue Light

produced by the display, which some recent research indicates can affect how well users sleep afterwards.

 

 

 

Figure 5

Display Spectra

Click to Enlarge

 

 

Display Power Consumption

The display power was measured using a Linear Regression between Luminance and AC Power with a fully charged battery.

All of our measurements were performed in the OnePlus 7 Pro set for QHD+ (3120x1440) Resolution and 90 Hz Refresh rate.

 

Comparison with LCDs

While LCDs remain more power efficient for images with mostly full screen white content (like all text screens on a

white background, for example), OLEDs are more power efficient for typical mixed image content because they are

emissive displays so their power varies with the Average Picture Level (average Brightness) of the image content over

the entire screen. For OLEDs, Black pixels and sub-pixels don’t use any power so screens with Black backgrounds are

very power efficient for OLEDs. For LCDs the display power is fixed and independent of image content.

 

For OLEDs the Display Power depends on the Picture Content.

An entirely Black OLED Screen uses 0 watts of Display Power.

 

Currently, OLED displays are more power efficient than LCDs for Average Pictures Levels of 70 percent or less, and

LCDs are more power efficient for Average Picture Levels above 70 percent.

Since both technologies are continuing to improve their power efficiencies, the crossover will continue to change with time.

 

Categories

OnePlus 7 Pro

Comments

 

Average Display Power

Maximum Brightness at

50% Average Picture Level

50% Average Picture Level

 

1.20 watts

with 453 cd/m2

16.9 inch2 Screen Area

This measures the Average Display Power for

a wide range of image content.

 

 

 

Maximum Display Power

Full White Screen

at Maximum Brightness

Maximum Power

Full Screen White

 

2.20 watts

with 405 cd/m2

16.9 inch2 Screen Area

This measures the Maximum Display power for

a screen that is entirely Peak White.

 

 

 

 

 

 

About the Author

Dr. Raymond Soneira is President of DisplayMate Technologies Corporation of Amherst, New Hampshire, which produces display calibration, evaluation, and diagnostic products for consumers, technicians, and manufacturers. See www.displaymate.com. He is a research scientist with a career that spans physics, computer science, and television system design. Dr. Soneira obtained his Ph.D. in Theoretical Physics from Princeton University, spent 5 years as a Long-Term Member of the world famous Institute for Advanced Study in Princeton, another 5 years as a Principal Investigator in the Computer Systems Research Laboratory at AT&T Bell Laboratories, and has also designed, tested, and installed color television broadcast equipment for the CBS Television Network Engineering and Development Department. He has authored over 35 research articles in scientific journals in physics and computer science, including Scientific American. If you have any comments or questions about the article, you can contact him at dtso.info@displaymate.com.

 

DisplayMate Display Optimization Technology

All Smartphone, Tablet, Monitor and TV displays can be significantly improved using DisplayMate’s proprietary very advanced scientific analysis and mathematical display modeling and optimization of the display hardware, factory calibration, and driver parameters. We help manufacturers with expert display procurement, prototype development, display performance improvement and optimization, testing displays to meet contract specifications, and production quality control so that they don’t make mistakes similar to those that are exposed in our public Display Technology Shoot-Out series for consumers. This article is a lite version of our advanced scientific analysis – before the benefits of our DisplayMate Display Optimization Technology, which can correct or improve all of these issues. If you are a display or product manufacturer and want to significantly improve display performance for a competitive advantage then Contact DisplayMate Technologies.

 

About DisplayMate Technologies

DisplayMate Technologies specializes in proprietary advanced scientific display calibration and mathematical display optimization to deliver unsurpassed objective performance, picture quality and accuracy for all types of displays including video and computer monitors, projectors, TVs, mobile displays such as Smartphones and Tablets, and all display technologies including LCD, OLED, 3D, LED, LCoS, Plasma, DLP and CRT. This article is a lite version of our intensive scientific analysis of Smartphone and Smartphone mobile displays – before the benefits of our advanced mathematical DisplayMate Display Optimization Technology, which can correct or improve many of the display deficiencies. We offer DisplayMate display calibration software for consumers and advanced DisplayMate display diagnostic and calibration software for technicians and test labs.

 

For manufacturers we offer Consulting Services that include advanced Lab testing and evaluations, confidential Shoot-Outs with competing products, calibration and optimization for displays, cameras and their User Interface, plus on-site and factory visits. We help manufacturers with expert display procurement, prototype development, and production quality control so they don’t make mistakes similar to those that are exposed in our Display Technology Shoot-Out series. See our world renown Display Technology Shoot-Out public article series for an introduction and preview. DisplayMate’s advanced scientific optimizations can make lower cost panels look as good or better than more expensive higher performance displays. If you are a display or product manufacturer and want to turn your display into a spectacular one to surpass your competition then Contact DisplayMate Technologies to learn more.

 

Article Links:  Apple iPhone XS Max OLED Display Technology Shoot-Out

Article Links:  Google Pixel 3 XL OLED Display Technology Shoot-Out

Article Links:  Samsung Galaxy S10 OLED Display Technology Shoot-Out

 

Article Links:  Display Color Gamuts Shoot-Out NTSC to Rec.2020

Article Links:  Absolute Color Accuracy Display Technology Shoot-Out

Article Links:  Watching Displays at Night

 

Article Links:  Mobile Display Shoot-Out Article Series Overview and Home Page

Article Links:  Display Technology Shoot-Out Article Series Overview and Home Page

 

 

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