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Microsoft Surface 3 Display Technology Shoot-Out

 

Dr. Raymond M. Soneira

President, DisplayMate Technologies Corporation

 

Copyright © 1990-2015 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

 

 

Microsoft Surface 3

 

Introduction

The key element for a great Tablet has always been a truly innovative and top performing display, and the best leading edge Tablets have always flaunted their beautiful high tech displays.

 

The Microsoft Surface 3 Tablet is a smaller and lighter version of Microsoft’s flagship Surface Pro 3, with a 10.8 inch screen instead of 12.0 inches for the Pro. What is particularly interesting about the Surface 3 is that its display performance is almost identical to the excellent Surface Pro 3 display, including a full sRGB Color Gamut. But in addition, it has a bonus – the Surface 3 is the first display that has a Color Gamut optimized for typical 300 lux indoor ambient light levels instead of for the dark, like all other current displays. It provides the best absolute color accuracy on a display for real-world indoor ambient lighting levels of 300 lux, an important performance feature that no other display currently provides.

 

Based on our extensive lab tests and measurements, the Surface 3 has one of the very best and most accurate displays available on any mobile platform and OS. It joins near the top of a small set of Tablets that have excellent top tier displays. We’ll cover these issues and much more, with in-depth comprehensive display tests, measurements and analysis that you will find nowhere else.

 

Microsoft provided DisplayMate Technologies with a production unit of the Surface 3 so that we could perform our well known objective and comprehensive display Lab tests, measurements, and analysis, explaining the in-depth display performance results for consumers, reviewers, and journalists.

 

The Display Shoot-Out

To examine the performance of the Microsoft Surface 3 Display we ran our in-depth series of Mobile Display Technology Shoot-Out Lab tests and measurements in order to determine how it performs compared to other leading Tablets. 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 LCD and OLED mobile displays have progressed in just four years see our 2010 Smartphone Display Shoot-Out, and for a real history lesson see our original 2006 Smartphone Display Shoot-Out.

 

Results Highlights

In this Results section we provide Highlights of the comprehensive DisplayMate Lab tests and measurements and extensive visual comparisons using test photos, test images, and test patterns that are covered in the advanced sections. The Display Shoot-Out Comparison Table summarizes the Lab measurements in the following categories:  Screen ReflectionsBrightness and ContrastColors and IntensitiesViewing AnglesLCD SpectraDisplay Power. You can also skip these Highlights and go directly to the Conclusions.

 

10.8 inch Display with a 3:2 Aspect Ratio

In terms of display size based on screen area, the Surface 3 is 19 percent smaller than the Surface Pro 3 screen, but 19 percent larger than the iPad Air 2 screen. The screen’s 3:2 (1.50) Aspect Ratio is an excellent compromise between the 4:3 (1.33) Aspect Ratio for most documents (the same as 8.5x11 inch paper with 0.5 inch borders, and also the iPad’s 4:3 Aspect Ratio) and 16:9 (1.78) Aspect Ratio for widescreen video content (and similar to Android Tablets that have a 16:10 (1.60) Aspect Ratio).

 

Display Sharpness and Sub-Pixel Rendering

The display’s 1920x1280 pixel resolution has 2.5 Mega Pixels, which is 19 percent more than on 1920x1080 Tablets or HDTVs, but 21 percent less than the Surface Pro 3’s 3.1 Mega Pixels. The screen’s 214 pixels per inch (ppi) is Very Good, but somewhat lower than on other full size Tablets, like the Apple iPad Air 2 with 264 ppi. But at typical viewing distances of 16 inches or more the pixels are not resolved with normal 20/20 Vision, so the display appears perfectly sharp. In addition, the Surface 3 uses Sub-Pixel Rendering (called ClearType in Microsoft’s implementation) that significantly improves the visual sharpness of text and graphics over standard Pixel Rendering that is used in most mobile displays. For black and white and gray images with sub-pixel rendering, there is up to a factor of 3 improvement in image sharpness, so the Surface 3 actually delivers sharper text and graphics than almost all other Tablets.

 

Color Gamut and Absolute Color Accuracy at 0 lux

Color Accuracy is especially important for many imaging applications when you must be sure of the on-screen image colors, when viewing photos from family and friends (because you often know exactly what they actually should look like), for some TV shows, movies, and sporting events with image content and colors that you are familiar with, and also for viewing online merchandise, so you have a very good idea of exactly what colors you are buying and are less likely to return them.

 

The Surface 3 has one of the most color accurate screens of any Tablet or Smartphone display that we have ever measured for the sRGB/Rec.709 Standard that is used in virtually all current consumer content for digital cameras, HDTVs, the internet, and computers, including photos, videos, and movies. Its Color Gamut is 109 percent in 0 lux absolute darkness, slightly larger than the Standard Gamut as shown in this Figure. The Absolute Color Accuracy for the Surface 3 is an Excellent 2.2 JNCD, among the most color accurate displays that we have ever measured for a Tablet or Smartphone. See this Figure for an explanation and visual definition of JNCD and the Color Accuracy Figures showing the measured Color Errors. See the Color Accuracy section, the Color Gamut Figure, and the Color Accuracy Figures for measurements and details.

 

Color Accuracy in 300 lux Typical Indoor Ambient Lighting

Displays are almost always calibrated and tested in the dark (0 lux) in order to prevent ambient light from contaminating the measurements, but they are almost always used in real world ambient lighting conditions at higher lux levels. Tablets are most often used indoors, but also outdoors under protected or subdued lighting. Typical indoor ambient lighting levels for comfortable workspaces are generally somewhere in the neighborhood of 300 lux, although in some office and commercial settings it may be higher and closer to 500 lux. Ambient light levels can of course be considerably higher, but most users will then try to reorient or reposition themselves and/or the display in order to reduce the amount of light hitting the screen.

 

Any ambient light reflected off the screen will wash out the images seen on the display, resulting in reduced image contrast, color saturation, and color accuracy. So, in principle, the display should have an appropriately higher color saturation and larger Color Gamut in order to counterbalance and compensate for the loss of color saturation in ambient light. And that is exactly what happens on the Surface 3. Its native Color Gamut triangle is appropriately enlarged so that the on-screen Color Gamut at 300 lux results in an almost perfect sRGB/Rec.709 Standard Color Gamut, which is shown in Figure 1. We remeasured the Absolute Color Accuracy in 300 lux ambient light, which is shown in Figure 2c. It is a very impressive 1.7 JNCD, more accurate than at 0 lux, and more accurate than any other display that we have ever measured in real world ambient lighting conditions at 300 lux. See this Figure for an explanation and visual definition of JNCD and the Color Accuracy Figures showing the measured Color Errors. See the Color Accuracy section, the Color Gamut and the Color Accuracy Figures for measurements and details.

 

Intensity Scale and Accurate Image Contrast

The Intensity Scale (sometimes called the Gray Scale) not only controls the 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 follow the Standard that is used to produce virtually all consumer content then the colors and intensities will be wrong everywhere in all images. Unfortunately, many manufacturers are quite sloppy with the Intensity Scale on their displays because it must be logarithmic. Fortunately, the Intensity Scale on Surface 3 is very accurate and a close match to the sRGB/Rec.709 Standard, although it becomes less steep with lower image contrast at the very dark end for signal levels below 25 percent. See Figure 3 for a plot of the measured Intensity Scale and the Colors and Intensities section for measurements and details.

 

Display Brightness

Mobile displays are often used under relatively bright ambient light, which washes out the image colors and contrast, reducing picture quality and making it harder to view or read the screen. The Surface 3 has a Peak Brightness of 395 cd/m2 (nits), which is Very Good, slightly lower than other full size Tablets like the Apple iPad Air 2 with 415 nits, but much less than some medium size Tablets like the Kindle Fire HDX 8.9 with 527 nits. High screen Brightness is only needed when working in High Ambient Light, but since the Surface 3 is larger it is less likely to be used outdoors in unshielded high ambient light environments like Smartphones and smaller Tablets, so its somewhat lower (but still Very Good) Peak Brightness should not be an issue for most users and applications. See the Brightness and Contrast section for measurements and details.

 

Screen Reflectance and Performance in Ambient Lighting

Displays are seldom used in absolute darkness, so their screen Reflectance and performance in Ambient Lighting is very important. The Surface 3 adjustable kickstand is particularly useful for adjusting the display angle in order to minimize reflections.

 

The screen Reflectance for the Surface 3 is 6.0 percent, which is Very Good and in the middle of most of the better Tablets, which fall in the range of 5.0 to 6.5 percent. However, the current record holders for low Reflectance are the iPad Air 2 and iPad mini 4, which have 2.5 and 2.0 percent screen Reflectance by using an anti-reflection coating on the screen. The display’s Contrast Rating for High Ambient Light measures the screen’s readability in Ambient Light and depends on both the screen Reflectance and Maximum Brightness. For the Surface 3 it is 65, which is again Very Good. It is again in the middle of most of the better Tablets, but significantly lower than a few Tablets that have values over 100. See the Screen Reflections and Brightness and Contrast sections for measurements and details.

 

Viewing Angle Performance

While Tablets 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, plus they are large enough for sharing the screen with others. One important advantage of the Surface 3 is its adjustable kickstand, which makes it possible to adjust the Viewing Angle of the display in the same way as a Laptop. That is not only convenient but also reduces any Viewing Angle effects.

 

The Surface 3 has a high performance IPS / PLS LCD display, so we expected it to show very small color shifts with Viewing Angle, and our lab measurements confirmed its excellent Viewing Angle performance, with no visually noticeable color shifts. However, all LCDs, do have a strong decrease in Brightness (Luminance) with Viewing Angle, and the Surface 3 showed (as expected) a 54 percent decrease in Brightness at a modest 30 degree viewing angle. See the Viewing Angles section for measurements and details.

 

Viewing Tests

With its relatively accurate Intensity Scale and very accurate colors the Surface 3 provides very nice, pleasing and accurate colors, and picture quality. The very challenging set of DisplayMate Test and Calibration Photos that we use to evaluate picture quality looked Beautiful, even to my experienced hyper-critical eyes. However, viewers that like vivid or exaggerated colors and image contrast may find the color accurate Surface 3 images to appear somewhat subdued.

 

Display Power Efficiency

While the Surface 3 display is larger in area than most other Top Tier Tablets and would normally be expected to require more power, its display is more power efficient and it actually uses less power than many smaller Tablets. For example, for an equivalent area and display brightness the Apple iPad Air 2 display uses 76 percent more display power than the Surface 3. This is due in part to its lower pixels per inch, which affects the display’s power efficiency, but it is also the result of higher efficiency White LEDs and optical stack in the Surface 3 display. See the Display Power section for measurements and details.

 

 

Surface 3 Conclusions:   An Excellent Top Tier 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 and even manufacturers are aware of and appreciate the very best in displays and display technology. We point out which manufactures 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 careful Lab measurements that we also publish, so that everyone can judge the data for themselves as well…

 

The Conclusions below summarize all the major results. See the main Display Shoot-Out Comparison Table for all the DisplayMate Lab measurements and test details, and see the Results Highlights section above for a more detailed introduction and overview with expanded discussions and explanations.

 

An Excellent Top Tier Display:

Based on our extensive Lab tests and measurements on the display for the Surface 3, Microsoft has produced an excellent high performance display for Windows. In fact, the Surface 3 has one of the very best and most accurate displays available on any mobile platform and OS. It joins near the top of a small set of Tablets that have excellent top tier displays – ideal for both professionals that need a very accurate high performance display for their work, and for consumers that want and appreciate a really nice and beautiful display.

 

The Surface 3 delivers uniformly consistent all around Top Tier display performance: it is only one of a few displays to ever to get all Green (Very Good to Excellent) Ratings in all test and measurement categories (except for Brightness variation with Viewing Angle, which is the case for all LCDs) since we started the Display Technology Shoot-Out article Series in 2006, an impressive achievement for a display. See the Shoot-Out Comparison Table for the detailed test and measurement results. Comparisons with the other leading Tablets are examined below.

 

The Best Color Accuracy in Indoor Ambient Lighting:

The Surface 3 has one of the most color accurate Tablet displays that we have ever measured for all standard consumer content (sRGB/Rec.709). It is tied for first place with the Surface Pro 3 and the Samsung Galaxy Tab S 10.5. That is an impressive achievement because everything in the display has to perform just right in order to produce very accurate colors – it is the single most challenging and important performance characteristic for a display. The Absolute Color Accuracy for the Surface 3 is an Excellent 2.2 JNCD.

 

Displays are almost always calibrated and tested in the dark (0 lux) in order to prevent ambient light from contaminating the measurements, and the above test results are for 0 lux. However, displays are almost always used in real world ambient lighting conditions at higher lux levels. Typical indoor ambient lighting levels for comfortable workspaces are generally somewhere in the neighborhood of 300 lux, although in some office and commercial settings it may be somewhat higher. Any ambient light reflected off the screen will wash out the images seen on the display, resulting in reduced image contrast, color saturation, and color accuracy.

 

As a result, the display should have an appropriately higher color saturation and Color Gamut in order to counterbalance and compensate for the loss of color saturation in ambient light. And that is exactly what happens on the Surface 3. The Absolute Color Accuracy for the Surface 3 in 300 lux ambient lighting is a very impressive 1.7 JNCD, better than for 0 lux, and better than any other display we have ever measured in real world ambient lighting of 300 lux. See the Color Accuracy Highlights and Color Accuracy sections, and the Color Gamut and Color Accuracy figures for measurements and details.

 

The Next Generation of Mobile Displays  –  Better Performance in Ambient Light:

The Surface 3 is the first display that has a larger Color Gamut optimized for typical 300 lux indoor ambient light levels instead of for viewing in total darkness. It is the first step in getting future displays to fully adjust their calibration based on the current level of ambient light that it is being exposed to. Right now most mobile displays and some TVs only raise or lower the display’s Luminance based on the level of ambient light. The next steps include also adjusting the Color Gamut and the Intensity Scale.

 

The most important improvements for both LCD and OLED mobile displays will come from improving their image and picture quality and screen readability in real world ambient light, which washes out the screen images, resulting in reduced image contrast, color saturation, and color accuracy. The key will be in lowering screen Reflectance and implementing Dynamic Color Management with automatic real-time modification of the display’s native Color Gamut and Intensity Scales based the measured Ambient Light level in order to have them compensate for the reflected light glare and image wash out from ambient light as discussed in our 2014 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 and Tablet 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, 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.

 

Microsoft Surface 3

 

Display Shoot-Out Comparison Table

Below we examine in-depth the display on the Microsoft Surface 3 based on objective Lab measurement data and criteria.

For comparisons and additional background information see our Surface Pro 3 Display Technology Shoot-Out,

our iPad Air 2 Display Technology Shoot-Out and our OLED Tablet Display Technology Shoot-Out articles.

 

For comparisons with the other leading Tablet, Smartphone and Smart Watch displays see our Mobile Display Technology Shoot-Out series.

 

Display Specifications

 

Categories

Microsoft Surface 3

Comments

Display Technology

10.8 inch diagonal

IPS / PLS LCD

The diagonal screen size.

In Plane Switching  Plane to Line Switching

Screen Shape

 3:2 = 1.50

Aspect Ratio

The 3:2 Aspect Ratio is between 4:3 for documents

and 16:9 for widescreen video content.

Screen Area

53.8 Square inches

A better measure of size than the diagonal length.

Display Pixel Resolution

 1920 x 1280 pixels

Screen Pixel Resolution.

Total Number of Pixels

 2.5 Mega Pixels

Total Number of Pixels.

Pixels Per Inch

 

 

 

 

 214 ppi

RGB Stripe Pixels

 

with ClearType Sub-Pixel Rendering

Very Good

Sharpness depends on the viewing distance and ppi.

See this on the visual acuity for a true Retina Display

 

 

 

20/20 Vision Distance

where Pixels or Sub-Pixels

are Not Resolved

16.1 inches

For 20/20 Vision the minimum Viewing Distance

where the screen appears perfectly sharp to the eye.

Display Sharpness

at Typical Viewing Distances

 

 

 

 

 

Display appears Perfectly Sharp

 

Pixels are not Resolved with 20/20 Vision

at Typical Viewing Distances of

16 inches or more

 

The Sub-Pixel Rendering significantly improves Display Sharpness

The Typical Viewing Distances for this screen size

are 16 inches or more.

 

 

 

 

 

Appears Perfectly Sharp

at Typical Viewing Distances

Yes

Typical Viewing Distances are 16 inches or more.

Photo Viewer Color Depth

 

 

 Full 24-bit Color

No Dithering Visible

256 Intensity Levels

Many Android Smartphones and Tablets still have some form of 16-bit color depth in the Gallery Viewer.

The Surface 3 does not have this issue.

 

Overall Assessments

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

See  Screen ReflectionsBrightness and ContrastColors and IntensitiesViewing AnglesLCD SpectraDisplay Power.

 

 

Surface 3

Comments

Viewing Tests

in Subdued Ambient Lighting

 

Very Good Images

Photos and Videos

have very good color

and accurate contrast

The Viewing Tests examine the accuracy of

photographic images by comparing the displays

to a calibrated studio monitor and HDTV.

 

Variation with Viewing Angle

Colors and Brightness

 

See Viewing Angles

 

Small Color Shifts

with Viewing Angle

 

Large Brightness Shift

with Viewing Angle

Typical for all LCDs

The Surface 3 display has small Color Shifts

with Viewing Angle.

 

All LCDs show a large Brightness shift with angle.

 

See the Viewing Angles section for details.

Overall Display Assessment

Lab Tests and Measurements

Excellent LCD Display

The Surface 3 display performed very well

in the Lab Tests and Measurements.

 

 

Absolute Color Accuracy

Measured over Entire Gamut

 

See Figure 2 and Colors

Excellent Color Accuracy at 0 lux Absolute Darkness

Excellent Color Accuracy at 300 lux Typical Indoor Ambient Lighting

Color Errors are Small

 

Very Accurate Display at 0 lux and at 300 lux

Absolute Color Accuracy is measured with a

Spectroradiometer for 21 Reference Colors

uniformly distributed within the entire Color Gamut.

 

See Figure 2 and Colors and Intensities for details.

Image Contrast Accuracy

 

See Figure 3 and Contrast

Very Good Accuracy

Image Contrast

Somewhat Too Low at the Dim End

The Image Contrast Accuracy is determined by

measuring the Log Intensity Scale and Gamma.

 

See Figure 3 and Brightness and Contrast for details.

Performance in Ambient Light

Display Brightness

Screen Reflectance

Contrast Rating

 

See Brightness and Contrast

See Screen Reflections

Very Good Brightness

 

Low Reflectance

 

Very Good

Contrast Rating

in High Ambient Light

Tablets 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

Excellent Calibration

The Surface 3 factory calibration delivers

very accurate colors and excellent overall

image and picture quality.

 

Overall Display Grade

Overall Assessment

Overall Surface 3 Display Grade is A

Excellent Top Tier Mobile Display

The Surface 3 is an excellent Top Tier

professional grade high performance display

that has one of the very best and most accurate

displays available on any mobile platform and OS.

 

Surface 3

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 Tablets 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. Hopefully manufacturers will 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.

 

 

Surface 3

Comments

Average Screen Reflection

Light From All Directions

6.0 percent

Ambient Light Reflections

Very Good

Measured using an Integrating Hemisphere and

a Spectroradiometer. The lowest value we have

ever measured for a Tablet is 2.5 percent.

Mirror Reflections

Percentage of Light Reflected

7.9 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.

 

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, 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.

 

 

Surface 3

Comments

Measured Maximum Brightness

100% Full Screen White

Brightness 395 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% Full Screen White

Brightness 395 cd/m2

Very Good

This is the Peak Brightness for a screen that

has only a tiny 1% Average Picture Level.

Measured Maximum Brightness

with Automatic Brightness On

High Ambient Light

Brightness 395 cd/m2

Very Good

Some displays have higher Maximum Brightness

in Automatic Brightness Mode.

 

 

Low Ambient Light

Lowest Peak Brightness

Brightness Slider to Minimum

5 cd/m2

Very Good for Low Light

The Lowest Brightness with the Slider set to Minimum. This is useful for working in very dark environments.

Black Brightness at 0 lux

at Maximum Brightness Setting

0.41 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

963

Very Good for Mobile

Only relevant for Low Ambient Light,

which is seldom the case for mobile devices.

 

High Ambient Light

Contrast Rating

for High Ambient Light

 

The Higher the Better

for Screen Readability

in High Ambient Light

66

Very Good

 

66

With Auto Brightness

Very Good

Depends on the Screen Reflectance and Brightness.

Defined as Maximum Brightness / Average Reflectance.

 

Some displays have higher Brightness

in Automatic Brightness Mode.

Screen Readability

in High Ambient Light

Very Good  A –

 

Very Good  A

With Auto Brightness

Indicates how easy it is to read the screen

under high ambient lighting. Depends on

both the Screen Reflectance and Brightness.

See High Ambient Light Screen Shots

 

Colors and Intensities

 

Figure 1

Color Gamuts

Click to Enlarge

 

Figure 2

Color Accuracy

Click to Enlarge

 

Figure 3

Intensity Scale

Click to Enlarge

 

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

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

when the content was produced. For LCDs a wider Color Gamut reduces the power efficiency and the Intensity Scale

affects both image brightness and color mixture accuracy.

 

 

Surface 3

Comments

Color of White

Color Temperature in degrees

 

Measured in the dark at 0 lux

See Figure 1

6,858 K

Close to Standard

1.1 JNCD from D65 White

 

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.

 

See Figure 1 for the plotted White Points.

Color Gamut

Measured in the dark at 0 lux

 

See Figure 1

   109 percent at 0 lux

sRGB / Rec.709

Close to Standard

 

See Figure 1

sRGB / Rec.709 is the color standard for most

content and needed for accurate color reproduction.

 

Color Accuracy at 0 lux Absolute Darkness

Absolute Color Accuracy

Average Color Error at 0 lux

 

For 21 Reference Colors

Just Noticeable Color Difference

See Figure 2

Average Color Error at 0 lux

From sRGB / Rec.709

Δ(u’v’) = 0.0088

 2.2 JNCD

 

Excellent Accuracy

 

See Figure 2

JNCD is a Just Noticeable Color Difference.

 

See Figure 2 for the definition of JNCD and for

Accuracy Plots showing the measured Color Errors.

 

Average Errors below 3.5 JNCD are Very Good.

Average Errors 3.5 to 7.0 JNCD are Good.

Average Errors above 7.0 JNCD are Poor.

Absolute Color Accuracy

Largest Color Error at 0 lux

 

For 21 Reference Colors

Just Noticeable Color Difference

See Figure 2

Largest Color Error at 0 lux

From sRGB / Rec.709

Δ(u’v’) = 0.0181

4.5 JNCD for Blue – Magenta

 

Very Good Accuracy

 

See Figure 2

JNCD is a Just Noticeable Color Difference.

 

See Figure 2 for the definition of JNCD and for

Accuracy Plots showing the measured Color Errors.

 

Largest Errors below   7.0 JNCD are Very Good.

Largest Errors 7.0 to 14.0 JNCD are Good.

Largest Errors above 14.0 JNCD are Poor.

This is twice the limit for the Average Error.

 

Color Accuracy at 300 lux Typical Indoor Ambient Lighting

Color Gamut

Measured at 300 lux

 

See Figure 1

   96 percent at 300 lux

sRGB / Rec.709

Close to Standard

 

See Figure 1

sRGB / Rec.709 is the color standard for most

content and needed for accurate color reproduction.

 

The measurements were made with the display

in a 300 lux ambient light level.

Absolute Color Accuracy

Average Color Error at 300 lux

 

For 21 Reference Colors

Just Noticeable Color Difference

See Figure 2

Average Color Error at 300 lux

From sRGB / Rec.709

Δ(u’v’) = 0.0070

 1.7 JNCD

 

Excellent Accuracy

 

See Figure 2

JNCD is a Just Noticeable Color Difference.

 

See Figure 2 for the definition of JNCD and for

Accuracy Plots showing the measured Color Errors.

 

Average Errors below 3.5 JNCD are Very Good.

Average Errors 3.5 to 7.0 JNCD are Good.

Average Errors above 7.0 JNCD are Poor.

Absolute Color Accuracy

Largest Color Error at 300 lux

 

For 21 Reference Colors

Just Noticeable Color Difference

See Figure 2

Largest Color Error at 300 lux

From sRGB / Rec.709

Δ(u’v’) = 0.0132

3.3 JNCD for Red

 

Very Good Accuracy

 

See Figure 2

JNCD is a Just Noticeable Color Difference.

 

See Figure 2 for the definition of JNCD and for

Accuracy Plots showing the measured Color Errors.

 

Largest Errors below   7.0 JNCD are Very Good.

Largest Errors 7.0 to 14.0 JNCD are Good.

Largest Errors above 14.0 JNCD are Poor.

This is twice the limit for the Average Error.

 

Intensity Scale

Dynamic Brightness

Luminance Decrease with

Average Picture Level APL

No 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 Accurate except

somewhat Shallow at the Dim End

 

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

Average 2.11

Varies 2.02 to 2.25

Standard is 2.20

Somewhat Low below 30% Intensity

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

See Figure 3

 

Viewing Angles

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

 

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 Tablet is held. The Viewing Angle can be very large if resting on a table or desk.

 

 

Surface 3

Comments

Brightness Decrease

at a 30 degree Viewing Angle

 54 percent Decrease

Large Decrease

Typical for all 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

       701 for Landscape

550 for Portrait

Very Good for Mobile

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’) = 0.0047

 1.2 JNCD

JNCD is a Just Noticeable Color Difference.

See Figure 2 for the definition of JNCD.

 

Primary Color Shifts

Largest Color Shift for R,G,B

at a 30 degree Viewing Angle

Small Color Shift

Largest Δ(u’v’) = 0.0082 for Blue

2.0 JNCD

JNCD is a Just Noticeable Color Difference.

See Figure 2 for the definition of JNCD.

 

Color Shifts for Color Mixtures

at a 30 degree Viewing Angle

Reference Brown (255, 128, 0)

Small Color Shift

Δ(u’v’) = 0.0073

1.8 JNCD

 

 

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.

 

 

 

Figure 4

Display Spectra

Click to Enlarge

 

 

Display Power Consumption

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

 

Since the displays all have different screen sizes and maximum brightness, the values were also scaled to the

same screen brightness (Luminance) and same screen area in order to compare their Relative Power Efficiency.

 

LCDs are typically more power efficient for images with mostly white content (like text screens, for example), while OLEDs

are more power efficient for mixed image content because they are emissive displays so their power varies with the

Average Picture Level (average Brightness) of the image content. For LCDs the display power is independent of image content.

 

The Surface 3 has display power efficiency comparable to the Surface Pro 3, but considerably better than the iPad Air 2.

 

 

Microsoft

Surface 3

Microsoft

Surface Pro 3

Apple

iPad Air 2

Comments

Maximum Display Power

Full White Screen

at Maximum Brightness

3.3 watts

395 cd/m2

53.8 inch2 Screen Area

3.5 watts

371 cd/m2

66.5 inch2 Screen Area

5.1 watts

415 cd/m2

45.2 inch2 Screen Area

This measures the display power for a screen that

is entirely at Peak White for Maximum Brightness.

 

Relative Power Efficiency

Display Power Scaled to the:

Same Luminance 395 cd/m2 Same Screen Area 53.8 inch2

3.3 watts

3.0 watts

5.8 watts

This compares the Relative Power Efficiency

by scaling to the same screen brightness and

same screen area as the Surface 3.

 

 

 


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 and Tablets 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, 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, HDTVs, 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 Tablet 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:  Surface Pro 3 Display Technology Shoot-Out

Article Links:  iPad Air 2 Display Technology Shoot-Out

Article Links:  OLED Tablet Display Technology Shoot-Out

 

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

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

 

 

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