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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  • Death666Angel - Friday, March 16, 2012 - link

    And another thing: "High gamut displays running sRGB content can sometimes look oversaturated if your applications aren't color space aware." Most WCG monitors offer sRGB modes. My old HP w2408h does, the Dell U2711 does, most NEC and Eizos do....
  • JarredWalton - Friday, March 16, 2012 - link

    But with no OSD or scaler, obviously there's no color mode select.
  • Death666Angel - Friday, March 16, 2012 - link

    Yes, but the statement in the review makes it sound as if that is a problem with all WCG monitors. Of course it doesn't apply to this model, because it doesn't even have WCG to begin with. But saying this is a plus because WCG monitors are oversaturated when most offer perfectly fine sRGB modes in their standard-OSD sounds to me like someone is looking for ways to promote this mediocre monitor. :-)
  • JarredWalton - Friday, March 16, 2012 - link

    I reviewed quite a few wide color gamut monitors back in the day that lacked an sRGB mode. Laptops with wide color gamut often have this issue as well (Dell Studio XPS 16 RGB LED for example). But before you try to imply that we are saying all WCG have problems, let's just look at the article text:

    "For many users, [77% gamut is] actually not a problem and could even be seen as a plus. (High gamut displays running sRGB content can sometimes look oversaturated if your applications aren't color space aware.)"

    *Could* be seen as a plus, *sometimes* look oversaturated. In other words, it depends on the specific monitor and settings available, as well as the intended use.
  • Oxford Guy - Saturday, March 17, 2012 - link

    A better way to state it is:

    Like most displays on the market, it only has a standard gamut white LED backlight, so it is listed as being able to display 99.9% of the sRGB color space and 77.2% of the Adobe RGB space. The sRGB space is the smallest gamut standard for display purposes, although it is the dominant space for general computing at this time. The Adobe RGB space is larger, but few games offer Adobe RGB content and it is generally limited to specific professional and prosumer usage, such as high-quality printing, photography, and art. General-purpose monitors that offer coverage beyond sRGB should have an effective sRGB emulation mode to avoid oversaturated colors when viewing sRGB content, such as most of the web. Some monitors, such as the Dell U2410, offer accurate sRGB emulation modes.
  • bryanlarsen - Friday, March 16, 2012 - link

    Awesome, these monitors pivot, which is rare for monitors this large. Two of them set up in portrait mode would make an awesome crazy dual screen setup!
  • kasakka - Friday, March 16, 2012 - link

    Since you'll be relying on color profiles for accurate colors, I'm guessing by the time you open any app that doesn't support them (mainly games) you will have tinted colors. I don't know how bad it is with factory settigns, but my Dell 3008WFP is pretty awful if you don't use a custom calibration setting set with the OSD.
  • hechacker1 - Friday, March 16, 2012 - link

    It depends on the game, but most games that use fullscreen will reset your LUT and mess up the color calibration.

    It's unfortunate, since the games don't have to do that, but they all seem to do it.

    However, there are software work-arounds. My spyder 3 comes with a utility that loads the icc profile every minute just for that reason.

    Or you can use DisplaycalGUI to load the profile on demand. Most games will only clear the LUT when they launch, so you can just reload the profile after.
  • PPalmgren - Friday, March 16, 2012 - link

    You know, a lot of people are still skeptical of input lag and I can say for certain that it is a factor having bought an S-PVA panel around 2006/7. While you show all the theoretical factors to these skeptics, I have an idea for a somewhat objective real-world performance test that you could show people, and also manage to have a little fun in the meantime.

    Ever play those clicky games where you have to click things rapidly? Play them 10 times, alternating, on a very high input lag monitor then on a low input lag monitor. Avarage the scores, and you might be surprised. I'd actually be willing to do this and am curious now that I thought of it. My desk has a 24' TN panel for games and a 24' S-PVA panel beside it. The lag on the PVA panel was the determining factor for me buying my TN panel. As someone with a past as a competitive gamer, I wonder if my scores will show any validity?
  • Southernsharky - Friday, March 16, 2012 - link

    300 is about as much as I will pay for a monitor.

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