Lenovo offers two display choices in the X1 Carbon, with a 1920x1080 model as the base option, and a 2560x1440 available with or without touch. While the resolution of the base panel is fine, the fact that it is a TN panel is not, so I would avoid that if at all possible. Thankfully the step up to the higher resolution model for $150 also gets you an IPS panel. With many devices that I see, there are some questionable decisions made, and I think the TN panel on a $1000+ Ultrabook is the one on this device.

Luckily Lenovo shipped the IPS panel for review. It is a 14-inch panel with a full RGB stripe. In the hardware ID the panel is just labeled as Lenovo, so I can’t say for sure who makes this panel. This model also has the touch digitizer. Despite that, it has almost a matte coating applied to it, or at least the anti-reflective coating is quite effective. This display also came with a built in ICC profile, so it was tested with that ICC being used.

To test the display characteristics, we use SpectraCal's CalMAN 5 suite along with the X-Rite i1Display Pro colorimeter for brightness and contrast readings, and the X-Rite i1Pro spectrophotometer for color accuracy testing.

Brightness and Contrast

Display - Max Brightness

Display - Black Levels

Display - Contrast Ratio

At 250 nits, the X1 Carbon does not get as bright as much of the competition. In fact, to do the color calibration steps, we set the display to 200 nits which is 92% in the power settings of this device. However black levels are quite good, so the overall contrast ratio is still a respectable 1100:1.


Display - Grayscale Accuracy

Display - White Point

With an average score under three, the grayscale on the X1 Carbon is quite good. The errors do get a bit higher though as the brightness increases, and 100% white actually has a dE of over 5. Gamma drops down quite a bit at the higher brightness levels, and the overall gamma is just 2.0, and the target is 2.2.


Display - Saturation Accuracy

Saturation accuracy was decent on this display with an overall error level of 3.5, as an average over all of the readings. It is not the best display, but it is far from the worst. It is really the reds that drift off the most.


Display - GMB Accuracy

The Gretag Macbeth is the most comprehensive of the tests, and it tests quite a few colors including a lot of the flesh tones. The overall score is once again a good, but not great result, at 3.66.

The overall display is really just average, with no really standout features. The brightness is a bit low, but the contrast is good. Colors are off, but not dramatically. Out of curiosity, I also tested the display without the ICC profile as well, and surprisingly it did not have much of a change in the results. When a generic ICC profile is used, it can’t take into account variability in the individual panels.

Generally ICC profiles are the most help to grayscale, so I ran through our calibration to see how much we could improve the panel.

The grayscale sees a significant improvement, with a dE2000 of just 0.454 and gamma is almost spot on a 2.2. This is what calibration should do, so it was great to see the improvement. Unfortunately this only had a mild effect on the color related scores. Without a 3D LUT, there is only so much you can do.

One other thing that I need to mention about the display is that, at least on the sample I received, there was a bit of a twinkle in the display, which was more noticeable on light colors like white. All displays have a bit of this due to the glue and coatings applied, but on the X1 Carbon it was a bit more noticeable than I was used to.

So overall the display is just OK. Back in 2013 when the X1 Carbon first launched, a display of this quality would have been quite welcomed, but as with all things, progress moves forward and expectations get higher with the competition.

GPU Performance Battery Life and Charge Time


View All Comments

  • mmrezaie - Thursday, May 21, 2015 - link

    I wish they had Iris GPU and also better battery life. I feel Macbook Pro 13 inch is still better option for developers like me. Reply
  • Kristian Vättö - Thursday, May 21, 2015 - link

    As an owner of the X1 Carbon, I can say that the battery life is really awful. I went back to my 2010 13" MacBook Air because it provides better and more consistent battery life and in my usage there's no difference in performance. Reply
  • lilmoe - Thursday, May 21, 2015 - link

    A review for the T-series is long overdue guys. Reply
  • T2k - Friday, May 22, 2015 - link

    True. Reply
  • Samus - Thursday, May 21, 2015 - link

    Lenovo has destroyed the Thinkpad name. They destroyed it years ago. The only high-end corporate laptops to consider are HP Elitebooks\Zbooks and a handful of Dell's. Every Thinkpad I've interacted with over the past few years is either on a replacement battery, has cracked USB ports with bent fingers, overheating issues causing flaky behavior, or a combination of these. Then there is the support, which is downright awful. Lenovo is notorious for throwing end-users under the bus, especially once they're out of warranty for such widespread symptoms that they should be recalls.

    Don't believe me? Search google for any of these issues, you will come across thousands of them, even though Lenovo has tried their damnedest to bury them within their own forums.
  • neo_1221 - Thursday, May 21, 2015 - link

    I've got 40 4-year old T420 Thinkpads and 20 3-year old T430 Thinkpads at my school. Of those, I've only had to send two back for repairs - one with a dead battery, and one with a failed display. They may not be as solid as they were under IBM, but they're by no means bad laptops. Reply
  • CasualUker - Thursday, May 21, 2015 - link

    The T420 and T430 where IBM designs. It wasn't till we switched over to the 540/440 series that it was done "in house." And looking at how they where built, I have zero confidence in them for long term durability vs the older series.

    Also on looking at the refurb department and seeing how many X1 Carbon Genesis and Mystics that needed to be repaired because of "faulty" mobos... Doesn't speak to well in terms of quality and for their future products.
  • chrnochime - Thursday, May 21, 2015 - link

    Any link that states the T420 and T430 were designed by IBM? The closest I could find was that Lenovo kept some of the IBM thinkpad designers around for T430. Reply
  • CasualUker - Friday, May 22, 2015 - link

    It was of IBM design, using the same suppliers and tolerance levels.

    I too thought it was strange since it was no longer that of a IBM company and Lenovo had bought out the Thinkpad name in 2005. But when we started on the Oasis and others in the x40 lines the engineers where very proud to tell me that the the whole thing was done "in house."
  • T2k - Friday, May 22, 2015 - link

    IBM had nothing to do with the T420 and newer laptops, this is patently false. Reply

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