All of the DisplayMate Display Performance Grades,
Ratings and Awards are based entirely on the extensive objective Lab tests and
measurements that we also publish, so that everyone can judge and compare the
display performance data for themselves as well.
|
Categories
|
Xiaomi
Redmi Note11T Pro+
|
Comments
|
|
Display Technology
|
LCD Display
with FFS Technology
6.6 inch
Diagonal / 16.8 cm Diagonal
Excluding the Rounded
Corners
|
Liquid Crystal Display
Fringe Field Switching Technology
|
|
Screen Aspect Ratio
|
20.5 : 9 =
2.28
Higher
Aspect Ratio
Most
Smartphones and Widescreen TVs have 16 : 9 = 1.78
|
Height to Width Aspect Ratio
The Redmi Note11T Pro+ screen is 28%
longer than
most Smartphones and widescreen 16:9 TV
content.
|
|
Screen Size
|
2.65
x 6.04 inches
6.74 x
15.35 cm
|
Display Width and Height in inches and
cm.
|
|
Screen Area
|
16.0 square
inches / 103.4 square cm
After
Subtracting the Camera Opening but not the Rounded Corners
|
A better measure of size than the
Diagonal.
|
|
Front Camera Opening Size
|
Front
Camera Opening has 0.1 percent of the Screen Area
Diameter
is 0.17 inches / 4.3 mm
|
Front Camera Opening is by the Top Center
of the Screen.
|
|
Supported Color Gamuts
|
Vivid mode
– Wide Color Gamut
Saturated
mode – Native LCD Color Gamut
Original
DCI-P3 mode – DCI-P3 Standard Color Gamut
Original sRGB mode – sRGB / Rec.709 Standard Color Gamut
Automatic
Color Management for Content with ICC Color Profiles
|
The Redmi Note11T Pro+ supports 2
Standard Color
Gamuts: sRGB and the new wider DCI-P3
Gamut
that is used in 4K Ultra HD TV content.
|
|
Display Refresh Rates
|
Display
Refresh Frames Per Second FPS
Normal
FPS: 60 Hz Refresh
High FPS:
90 Hz and 144 Hz Refresh for Smoother Scrolling and Motion
|
Higher Refresh Rates improve image
Scrolling
plus Video and Motion Performance in
Apps,
and may reduce Screen Flicker that some
people experience.
|
|
Display Resolution
|
2460
x 1080 pixels
2K+ /
FHD+
|
Screen Pixel Resolution.
Full HD is 1920 x 1080 pixels.
|
|
Total Number of Pixels
|
2.7 Mega
Pixels
|
Total Number of Display Pixels.
|
|
Pixels Per Inch PPI
|
407 PPI
Excellent
|
Sharpness depends on the viewing distance
and PPI.
See this on
the visual acuity for a true Retina Display
|
|
Sub-Pixels Per Inch SPPI
|
Red
407 SPPI
Green
407 SPPI
Blue
407 SPPI
|
The Sub-Pixels Per Inch are the same for
the Red, Green, and Blue Primaries.
|
|
Total Number of Sub-Pixels
|
Red
2.7 Million Sub-Pixels
Green 2.7
Million Sub-Pixels
Blue
2.7 Million Sub-Pixels
|
Total Number of Sub-Pixels are the same
for
the Red, Green, and Blue Primaries.
|
|
20/20 Vision Distance
where Pixels or Sub-Pixels
are Not Resolved
|
8.4 inches / 21.4 cm for White and Green Sub-Pixels with 20/20 Vision
8.4
inches / 21.4 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
|
Xiaomi
Redmi Note11T 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.
|
|
Overall Display Performance 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,
Absolute Color Accuracy, Viewing Angles, LCD Spectra
The
Redmi Note11T Pro+ has Automatic Color Management that switches to the
appropriate Color Gamut for Content with ICC Color Profiles.
Here
we provide results for the Vivid mode, which has a Wide Color Gamut and a Bluish White Point,
the
Original DCI-P3 mode, which is calibrated for the new DCI-P3 Gamut that is used
in 4K Ultra HD TVs,
and
the Original 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
|
Vivid
mode
Wide Color
Gamut
|
Original
mode
DCI-P3
Content
|
Original
mode
sRGB
Content
|
Comments
|
|
Viewing Tests
in Subdued Ambient Lighting
|
Very Good
Images
Photos and
Videos
have Vivid
Color
and
Accurate Contrast
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
|
Very Small
Color Shifts
with
Viewing Angle
Large
Brightness Shifts
with
Viewing Angle
|
Very Small
Color Shifts
with
Viewing Angle
Large
Brightness Shifts
with
Viewing Angle
|
Very Small
Color Shifts
with
Viewing Angle
Large
Brightness Shifts
with
Viewing Angle
|
The Redmi Note11T Pro+ display has
Very Small Color Shifts with Viewing
Angle and
Large Brightness Shifts with Viewing
Angle
See the Viewing Angles section for details.
|
|
Overall Display Assessment
Lab Tests and Measurements
|
Excellent
LCD Display
Vivid Color
Mode
|
Excellent
LCD Display
Accurate
DCI-P3 Content
|
Excellent
LCD Display
Accurate
sRGB Content
|
The Redmi Note11T Pro+ LCD 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
Intentionally
Vivid Colors
Bluish White
Point
|
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
|
Excellent
Accuracy
Image
Contrast
Very
Accurate
|
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
Bluish White
Point
|
Excellent
Calibration
Accurate
DCI-P3 Content
|
Excellent
Calibration
Accurate
sRGB Content
|
The Redmi Note11T Pro+ has sRGB and
DCI-P3 modes
that deliver accurately calibrated
colors and images
and a Vivid mode that is preferred by
some users and for some applications.
|
|
|
Overall Display Grade
Overall
Assessment
|
Overall Xiaomi Redmi Note11T
Pro+ Display Grade is Excellent A+
DisplayMate Best
Smartphone Display Award
with 14 Smartphone
Display Performance Records
including 8 that are
Visually Indistinguishable From Perfect
An Excellent Top Tier
World Class Smartphone Display
|
The Xiaomi Redmi Note11T Pro+ display
delivers Excellent Image Quality, has both Original sRGB
and Original DCI-P3 modes and a Vivid
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.
|
|
Vivid Color
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
|
Vivid
mode
Wide Color
Gamut
|
Original
mode
DCI-P3
Content
|
Original
mode
sRGB
Content
|
Comments
|
|
Xiaomi Redmi Note11T 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, journalists, reviewers, 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 of the DisplayMate Display
Performance Grades, Ratings and Awards are based entirely on the extensive
objective Lab tests and measurements that we also publish, so that everyone
can judge and compare the display performance 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 DisplayMate
Lab Measurement Objective Display Performance Metrics.
The Xiaomi
Redmi Note11T Pro+ sets or matches 14 Smartphone Display Performance Records
for:
Numerical Display Performance
Differences that are Visually Indistinguishable are considered Matched and
Tied Performance Records.
JNCD is a Just Noticeable
Color Difference
and APL is the Average
Picture Level
for on-screen Image Content.
· Highest Color Accuracy of White (0.5
JNCD for sRGB and 0.5 JNCD for DCI-P3) – Visually
Indistinguishable From Perfect.
· Highest Absolute Color Accuracy (0.7
JNCD for sRGB and 0.5 JNCD for DCI-P3) – Visually
Indistinguishable From Perfect.
· Smallest Maximum Color Error (1.5
JNCD for sRGB and 1.3 JNCD for DCI-P3) – Visually
Indistinguishable From Perfect.
·
Smallest Shift in Color Accuracy with APL (0.3 JNCD
for sRGB and 0.2 JNCD for DCI-P3) – Visually
Indistinguishable From Perfect.
·
Smallest Maximum
Color Shift with APL (0.6 JNCD for sRGB
and 0.5 JNCD for DCI-P3) – Visually
Indistinguishable From Perfect.
· Highest
Image Contrast Accuracy and
Intensity Scale Accuracy (2.18
Gamma) – Visually Indistinguishable From Perfect.
·
Smallest Shift
in Image Contrast and Intensity Scale with APL (0.00 Gamma) – Visually Indistinguishable From Perfect.
·
Smallest Change in Peak Luminance with APL (0
percent) – Visually Indistinguishable From Perfect.
·
Highest Full Screen Brightness for
LCD Smartphones (663 nits at 100% APL).
· Largest Native Color Gamut (107%
DCI-P3 and 135% sRGB / Rec.709 for the Saturated Color Mode).
· Highest Contrast Ratio for LCD Smartphones
(1,310).
· Lowest Screen Reflectance (4.6
percent).
· Smallest Color Variation of White with Viewing Angle (0.9
JNCD at 30 degrees).
· Smallest Maximum Color Variation with Viewing Angle (0.8
JNCD at 30 degrees).
The Xiaomi Redmi Note11T Pro+ earns our
Highest A+ Display Performance Assessment Rating
LCDs have evolved into a highly refined and mature display
technology that produces high performance displays for Smartphones.
Xiaomi has concentrated on significantly raising the
on-screen Absolute Picture Quality and Absolute Color Accuracy of the LCD Display by
implementing Precision Factory Display Calibration,
moving the overall Xiaomi Redmi Note11T Pro+ Display
Performance up to Record Setting Outstanding
Levels with close to Text Book Perfect
Calibration Accuracy that is Visually
Indistinguishable From Perfect.
· DisplayMate
Display Performance Ratings:
All of the Results in this article are based Entirely
on our Objective and Extensive DisplayMate Lab Tests and Measurements that
are all listed in the sections below.
· To get a DisplayMate A Display
Performance Rating the display must get All Green [Very Good to Excellent]
Ratings for All of the Display Tests and Measurements [except for Luminance
and Color Shifts at 30 degrees Viewing Angle, which are deemed less
important].
· Then to get a DisplayMate A+ Display
Performance Rating the Average Absolute Color Accuracy and the Average Absolute
Color Accuracy Shifts with Average Picture Level APL must All be less
than 1.0 JNCD, and the Largest Color Errors must All be less than 3.0
JNCD.
The Xiaomi Redmi Note11T Pro+ display meets all of the criteria and
requirements for a DisplayMate A+ Grade, earning DisplayMate’s Highest
Overall Display Assessment Rating and Highest Display Performance Grade of
A+.
DisplayMate Display Performance Rating and
Best Smartphone Display Award
Based on our extensive Lab Tests and Measurements the Xiaomi Redmi Note11T Pro+ has a Very Impressive
Excellent Top Tier World Class Smartphone Display with close to Text Book Perfect Calibration Accuracy and Performance
that is Visually Indistinguishable From Perfect. Based on our objective Lab Tests and Measurements
the Xiaomi Redmi Note11T Pro+ receives
a DisplayMate Best Smartphone Display Award
earning DisplayMate’s highest ever Display
Performance Grade of A+ and setting or matching 14 Smartphone Display Performance Records including
8 that are Visually Indistinguishable From Perfect
that are listed above.
The Xiaomi Redmi Note11T
Pro+ is the First LCD Smartphone Display to be Awarded a DisplayMate A+
Display Performance Rating and Certification.
The Xiaomi Redmi Note11T
Pro+ joins the very select Top Tier of Smartphone Displays 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, but only the Very Best
Displays will continue to receive A+ Ratings each year.
|
|
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 Color Modes.
The Redmi Note11T Pro+ has close to the
lowest Screen Reflectance level that we have measured for a production
Smartphone.
These results are extremely important
for screen readability, picture quality, and color accuracy in ambient light.
|
Categories
|
Xiaomi
Redmi Note11T 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 measured
for a production Smartphone is 3.4
percent.
|
|
Mirror Reflections
Percentage of Light Reflected
|
5.6
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 measured
for a production Smartphone is 4.5
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.
Note that there is No Change (0 percent)
in Brightness and Contrast with the Average Picture Level APL.
|
Categories
|
Vivid
mode
Wide Color
Gamut
|
Original
mode
DCI-P3
Content
|
Original
mode
sRGB
Content
|
Comments
|
|
Home Screen Peak Brightness
Measured for White
|
Brightness
514 cd/m2
Excellent
|
Brightness
502 cd/m2
Excellent
|
Brightness
502 cd/m2
Excellent
|
The Peak Brightness for White on the
Home Screen.
|
|
Measured Average Brightness
50% Average Picture Level
|
Brightness
549 cd/m2
Excellent
|
Brightness
506 cd/m2
Excellent
|
Brightness
505 cd/m2
Excellent
|
This is the Brightness for typical
screen content
that has a 50% Average Picture Level.
|
|
Measured Full Brightness
100% Full Screen White
|
Brightness
550 cd/m2
Excellent
|
Brightness
506 cd/m2
Excellent
|
Brightness
503 cd/m2
Excellent
|
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
548 cd/m2
Excellent
|
Brightness
505 cd/m2
Excellent
|
Brightness
504 cd/m2
Excellent
|
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
|
0 percent
Decrease
Excellent
|
0 percent
Decrease
Excellent
|
0 percent
Decrease
Excellent
|
This is the percent Brightness decrease
with APL
Average Picture Level. Ideally should be
0 percent.
Higher values may improve Contrast in
Ambient Light.
|
|
Low Ambient Light
|
|
Lowest Peak Brightness
Super Dimming Mode
Brightness Slider to Minimum
|
1.5 cd/m2
For Very
Low Light
|
1.5 cd/m2
For Very
Low Light
|
1.5 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
|
0.42 cd/m2
Very Good
for Mobile
|
0.42 cd/m2
Very Good
for Mobile
|
0.42 cd/m2
Very Good
for Mobile
|
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
|
1,310
Very Good
for Mobile
|
1,202
Very Good
for Mobile
|
1,205
Very Good
for Mobile
|
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
614 cd/m2
Excellent
|
High
Brightness Mode
616 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
663 cd/m2
Excellent
|
High
Brightness Mode
615 cd/m2
Excellent
|
High
Brightness Mode
613 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
663 cd/m2
Excellent
|
High
Brightness Mode
614 cd/m2
Excellent
|
High
Brightness Mode
613 cd/m2
Excellent
|
This is the Peak Brightness for a screen
that
has only a small 1% Average Picture
Level.
|
|
Dynamic Brightness
Change in Luminance with
Average Picture Level APL
|
0 percent
Decrease
Excellent
|
0 percent
Decrease
Excellent
|
0 percent
Decrease
Excellent
|
This is the percent Brightness decrease
with APL
Average Picture Level. Ideally should be
0 percent.
Higher values may improve Contrast in
Ambient Light.
|
|
High Ambient Light Contrast Rating
|
|
Contrast Rating
for High Ambient Light
The Higher the Better
for Screen Readability
in High Ambient Light
|
119 – 120
With Manual
Brightness
Very Good
144 – 145
High
Brightness Mode
Very Good
|
110 – 110
With Manual
Brightness
Very Good
133 – 134
High
Brightness Mode
Very Good
|
109 – 110
With Manual
Brightness
Very Good
133 – 134
High
Brightness Mode
Very Good
|
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
Very Good A
With Auto
Brightness On
|
Very Good A
With Manual
Brightness
Very Good A
With Auto
Brightness On
|
Very Good A
With Manual
Brightness
Very Good 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 Redmi Note11T Pro+ has
Automatic Color Management that switches to the appropriate Color Gamut for
Content with ICC Color Profiles.
The Redmi Note11T Pro+ also
has a Saturated Color mode with the Native Color Gamut of the LCD Display,
which is 107% of the DCI-P3 Gamut and 135% of the sRGB Gamut. The
White Point is 8,480 K.
Note that there is No Change in the Absolute Color Accuracy and
Intensity Scale with the Average Picture Level APL.
|
Categories
|
Vivid
mode
Wide Color
Gamut
|
Original
mode
DCI-P3
Content
|
Original
mode
sRGB
Content
|
Comments
|
|
Color of White
Color Temperature in degrees
Measured in the dark at 0 lux
The White
Point is Adjustable
with the Reading Mode
Adaptive Colors Mode
Interactive Touch Screen
|
8,310 K
4.4 JNCD
from D65 White
Bluish
White Point
Intentionally
Bluish Mode
See Figure
1
|
6,380 K
0.5 JNCD
from D65 White
Very Close
to Standard
Excellent
Accurate
White Point
See Figure
1
|
6,380 K
0.5 JNCD
from D65 White
Very Close
to Standard
Excellent
Accurate White
Point
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
|
100 percent
DCI-P3
Cinema Gamut
126 percent
sRGB /
Rec.709 Gamut
Intentionally
Vivid Colors
See Figure
1
|
100 percent
DCI-P3
Cinema Gamut
Very Close
to Standard
Excellent
Accurate
DCI-P3 Content
See Figure
1
|
101 percent
sRGB /
Rec.709 Gamut
Very Close
to Standard
Excellent
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
|
|
Color Gamut in Ambient Light
Measured at 1,000 lux
Display Brightness set at Maximum
1,000 lux corresponds to
very bright indoor lighting or outdoor
daylight with an overcast sky.
|
at 1,000
lux
79 percent
DCI-P3
Cinema Gamut
100 percent
sRGB /
Rec.709 Gamut
Very Good
See
Figure 1
|
at 1,000
lux
79 percent
DCI-P3
Cinema Gamut
Very Good
See
Figure 1
|
at 1,000
lux
77 percent
sRGB /
Rec.709 Gamut
Very Good
See
Figure 1
|
The visible on-screen Color Gamut
decreases
as the Ambient Light level increases.
The Ambient Light level is measured in
lux.
The Gamut Depends on both the Display
Brightness
and the Screen Reflectance.
See
Figure 1
|
|
Absolute Color Accuracy
|
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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’)
= 0.0201
5.0 JNCD
Intentionally
Vivid Colors
Vivid Mode
|
Average
Color Error
From
DCI-P3
Δ(u’v’)
= 0.0022
0.5 JNCD
Excellent
Accuracy
Accurate
DCI-P3 Content
See Figure 2
|
Average Color Error
From sRGB
/ Rec.709
Δ(u’v’)
= 0.0027
0.7 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 2.0 JNCD are
Excellent.
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
Maximum 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’)
= 0.0407
10.2 JNCD
for 100%
Red
Intentionally
Vivid Colors
Vivid Mode
|
Largest Color Error
From
DCI-P3
Δ(u’v’)
= 0.0051
1.3 JNCD
for 75%
Magenta
Excellent
Accuracy
Accurate
DCI-P3 Content
See Figure 2
|
Largest Color Error
From sRGB
/ Rec.709
Δ(u’v’)
= 0.0058
1.5 JNCD
for 75%
Magenta
Excellent
Accuracy
Accurate
sRGB Content
See Figure 2
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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 2.0 JNCD are
Excellent.
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 in 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
|
White Point
Color Shift
from Low
to High APL
Δ(u’v’)
= 0.0002
0.1 JNCD
Excellent
|
White Point
Color Shift
from Low
to High APL
Δ(u’v’)
= 0.0003
0.1 JNCD
Excellent
See Figure 4
|
White Point
Color Shift
from Low
to High APL
Δ(u’v’)
= 0.0006
0.2 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 2.0 JNCD are
Excellent
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
|
Vivid mode
Intentionally
Vivid Colors
|
Average
Color Shift
from Low
to High APL
Δ(u’v’)
= 0.0009
0.2 JNCD
Excellent
See Figure 4
|
Average
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 2.0 JNCD are
Excellent
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.
|
|
Maximum Color Shift
For 41 Reference Colors
Just Noticeable Color Difference
See Figure 4
|
Vivid mode
Intentionally
Vivid Colors
|
Largest Color Shift
from Low
to High APL
Δ(u’v’)
= 0.0020
0.5 JNCD
for 75%
Blue-Magenta
Excellent
See Figure 4
|
Largest Color Shift
from Low
to High APL
Δ(u’v’)
= 0.0022
0.6 JNCD
for 50%
Blue-Magenta
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 2.0 JNCD are
Excellent
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
|
0 percent
Decrease
Excellent
|
0 percent
Decrease
Excellent
|
0 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
|
Very
Smooth and Straight
Excellent
Very
Accurate
|
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
|
Gamma 2.20
Excellent
Gamma Very
Accurate
|
Gamma 2.18
Excellent
Gamma Very
Accurate
|
Gamma 2.18
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
|
Excellent
|
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
Viewing Angle variations are essentially identical for all of the Color
Modes.
Note
that 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 Brightness Decrease at 30 degrees Viewing Angle is
typically Greater than 50 percent for most
LCD Technologies.
Color Shifts:
· The White Point Color Shift is the most viewer noticeable
Color Shift with Viewing Angle because it is often the screen background.
The Redmi Note11T Pro+ display has a Very Small White
Shift of just 0.9 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 Shift for the Red Primary at 30 degrees
Viewing Angle is just 0.2 JNCD, which is unlikely to be noticeable.
· The Color Shift for the Green
Primary at 30 degrees Viewing Angle
is just 0.6 JNCD, which is unlikely to be
noticeable.
·
The Color Shift for the Blue Primary at 30
degrees Viewing Angle is just 0.8 JNCD, which is unlikely to be noticeable.
But Color Shifts in the Blue Region are less
visually noticeable as discussed in this article
|
Categories
|
Vivid
mode
Wide Color
Gamut
|
Original
mode
DCI-P3
Content
|
Original
mode
sRGB
Content
|
Comments
|
|
Brightness Decrease
at a 30 degree Viewing Angle
|
59 percent
Brightness Decrease
Large
Brightness Decrease is Typical for LCDs
|
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
|
Portrait
Mode 400
Landscape
Mode 510
Good for Mobile Displays
Comparable
to Typical Contrast Ratios in Low Ambient Light
|
A measure of screen readability when the
screen
is tilted under Low Ambient Lighting.
|
|
White Point Color Shift
at a 30 degree Viewing Angle
|
Very Small
Color Shift
Δ(u’v’)
= 0.0037
0.9 JNCD
Excellent
|
JNCD is a Just Noticeable Color Difference.
See Figure 2 for the
definition of JNCD.
Color Shifts below 2.0 JNCD are
Excellent
|
|
Color Shifts for the Primaries
|
|
Red Primary Color Shift
at a 30 degree Viewing Angle
|
Very Small
Color Shift
Δ(u’v’)
= 0.0009
0.2 JNCD
Excellent
|
JNCD is a Just Noticeable Color Difference.
See Figure 2 for the
definition of JNCD.
Color Shifts below 2.0 are Excellent
|
|
Green Primary Color Shift
at a 30 degree Viewing Angle
|
Very Small
Color Shift
Δ(u’v’)
= 0.0025
0.6 JNCD
Excellent
|
JNCD is a Just Noticeable Color Difference.
See Figure 2 for the
definition of JNCD.
Color Shifts below 2.0 are Excellent
|
|
Blue Primary Color Shift
at a 30 degree Viewing Angle
|
Very Small
Color Shift
Δ(u’v’)
= 0.0034
0.8 JNCD
Excellent
|
JNCD is a Just Noticeable Color Difference.
See Figure 2 for the
definition of JNCD.
Color Shifts below 2.0 are Excellent
|
|
|
|
Color Shifts for Color Mixtures
at a 30 degree Viewing Angle
Reference Brown (255, 128, 0)
|
Very Small
Color Shift
Δ(u’v’)
= 0.0028
0.7 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 Vivid, sRGB and DCI-P3 Color Modes, and for the Reading Mode are measured in Figure 5 below.
The Display White Point is Adjustable:
with the Reading Mode, Adaptive Colors Mode, and Interactive Touch
Screen.
· The Reading 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.
The
White Point can shift down to a Warm 3,760 K. See Figure 5.
· The Adaptive Colors Mode automatically
changes the White Point and color balance of the display based on real-time
measurements of the
Color of the Ambient Light falling on the screen. The idea is to make the
display behave more like
paper reflecting Ambient
Light and taking on its Color. It is implemented with an Ambient Light Sensor
that measures
the Color of the
Ambient Light in addition to its Brightness.
The White Point can shift between 5,290 to 7,770 K.
· The Interactive Touch
Screen in Display Settings allows the White Point to be chosen from a
Color Map or Buttons.
The
White Point can shift between 5,950 to 6,760 K for the Original sRGB and
DCI-P3 Modes, and 7,610 to 8,930 K for the Vivid Mode.
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