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.
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
Specifications, Overall Assessments, Screen Reflections, Brightness
and Contrast,
Colors and Intensities,
Absolute Color Accuracy, Viewing Angles, OLED Spectra,
Display 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.
· 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.
· 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.
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
Specifications, Overall Assessments, Screen Reflections, Brightness
and Contrast,
Colors and Intensities, Absolute Color Accuracy, Viewing Angles, OLED
Spectra, Display 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 Reflections, Brightness
and Contrast, Colors and Intensities,
Viewing Angles, OLED
Spectra, Display 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
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.
|
|
|
|
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.
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: Display Technology Shoot-Out
Article Series Overview and Home Page
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
