Color Uniformity and Color Gamut

The calibrated results on the ZR2740w were pretty good, but with such a large panel was the uniformity going to suffer because of it? 23” 1080p displays have a hard time with uniformity and are easier to fix, but perhaps since the HP is a higher end display more work has been put into keeping the screen uniform all around. Measuring nine points around the screen at the 200 nits calibrated setting, you can see what we found.

LCD Color Uniformity

Only one of the nine locations had an average dE above 3, and the median value there was still below 2.75. What concerned me the most is that the uniformity on the grayscale was so bad, so when you have a solid white background, which is likely on a monitor like this with spreadsheets and other applications, you will be able to clearly see a shift in the white point as you look at it. Colors were far more consistent than white was across the display, so it seems to be a shift when the panel is fully driven, probably due to unevenness in the lighting I would assume.

While it has an 8-bit panel and can do 10-bit colors with A-FRC, the backlight system of the HP means that you aren’t going to get the full AdobeRGB colorspace on it. The HP comes out of Gamutvision with 76.82% of the AdobeRGB space, pretty much dead on to the 77.2% in the specs.

Color Quality Brightness and Contrast
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  • Solidstate89 - Sunday, March 18, 2012 - link

    Thanks for the reply. Hopefully you guys can obtain one soon. I'm looking for a nice 27" monitor and the U2711, this HP monitor and the Samsung one are high up my list.
  • Oxford Guy - Wednesday, March 21, 2012 - link

    The early PLS monitors were not well-rated. Among other problems, they had poor contrast. I don't know if the tech has improved, but I think it has because as I recall, the most recently reviewed model on -- which may be the one you're talking about -- was well-rated.
  • Oxford Guy - Wednesday, March 21, 2012 - link

    Check the German version of the site with Google translate if you're a non-speaker. You may find the monitor you're looking for.
  • The Ugly Truth - Saturday, March 17, 2012 - link

    Freedom of expression and freedom to have an online life outside of AT forums reach is all we ask.
  • Oxford Guy - Wednesday, March 21, 2012 - link

    "Freedom of expression..."

    There is no free speech, anywhere. No matter where you are, as long as there are a group of people -- government happens. When government happens, restrictions are placed on behavior. You won't find freedom of expression in the forums here or anywhere else. You'll only find degrees of it, and how well your agenda matches the agenda of the mods will determine how free you feel you are.

    "and freedom to have an online life outside of AT forums"

    This makes no sense, unless the forum implements some sort of slavery.
  • Oxford Guy - Saturday, March 17, 2012 - link

    Use Google translate:

    Every monitor that comes through Anandtech should specify whether it uses PWM or constant control.
  • cheinonen - Saturday, March 17, 2012 - link

    There was a good article at this at TFT Central as well (I try to read as much as I can) and adding a test for it was something I was hoping to get going soon.
  • Oxford Guy - Wednesday, March 21, 2012 - link

    I read that, but I'd say the article is better.
  • SantaAna12 - Sunday, March 18, 2012 - link

    Earlier this year you reviewed the Asus VA278Q. No mention of this? I ask because you presented it as an affordable quality 27 inch monitor with the same resolution to this one. As to the price of the Dell 27 the person saying "people are paying 1000.00$ for this monitor" must have money to burn.
  • cheinonen - Monday, March 19, 2012 - link

    The ASUS was posted as being shown at CES, but hasn't started shipping or been reviewed by anyone yet. Once it starts to ship we will try to take a look at it.

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