Viewing Angles and Color Quality

The ASUS ML248H uses a TN panel, and viewing angles are always one thing that suffers with TN. With the monitor on my desk and tilted back, I can see a color and brightness shift from top to bottom quite easily. I found myself wishing that I could either reduce the height to make the center of the screen more even with my eye level, or have it higher and tilted forward a bit to accomplish the same thing. This gets worse with the larger the TN panels as well, but the lack of adjustments available in the ML248H made it a bit hard to see sometimes.

I will note that the ML248H has a tilt adjustment, but my review unit had the screw that connects the base to the monitor go missing at some point. Because of this I couldn’t use the tilt mechanism without worrying the monitor would fall off the stand and potentially be damaged. It’s possible that with this adjustment the angle would not have bothered me as much, but I was not able to get a replacement screw in time for testing. I did find that a spare bolt I had laying around from IKEA was the correct threading to fit, but the connection wasn’t as tight as with the original screw.

Color Quality

Our color testing uses the same procedure as in previous reviews, specifically, we test before and after calibration using ColorEyes Display Pro with an Eye One Display 2 colorimeter. We’ll start with the out-of-box experience.

Color Tracking - XR Pro and Xrite i1D2

Pre-calibration, the ML248H suffers from a delta E (dE) over 10, with large errors across the whole spectrum. The grayscale is particularly bad, with errors all in the double digits. This isn’t too surprising at all, as most monitors ship this way—particularly budget (TN) displays.

For our calibrated readings, I used the Standard mode and the User color settings to get the white point as close to D65 and the light output at 200 nits (or slightly above) as possible. This was particularly tricky on the ASUS as when I adjusted the white balance, any change to the contrast would send the grayscale out of alignment and add a very blue tone to the image. I wound up having to choose a level around 210 nits of output before I calibrated the white point to allow myself the headroom to get the white balance correct and still be above 200 nits. You can also enable DDC control and get almost identical results to what I did by hand, if your hardware supports it, and save yourself a lot of time.

Color Tracking - XR Pro and Xrite i1D2

For a monitor targeting the sRGB colorspace, the ML248H does pretty well with a dE of 1.80 for the center. The maximum dE is 6.81, which occurs on a shade of cyan that does not fall inside of the sRGB colorspace, so there will always be an error unless the monitor can do the Adobe RGB colorspace. The median dE is only 1.32, which indicates that the majority of colors are closer to accurate than the average dE indicates, but a few are far off. These are typically blue heavy colors, often at the edge or outside the sRGB colorspace, and those are skewing the results as well.

Also looking carefully at the results, we see the grayscale values in the chart all have values below 0.43 dE, other than black which is 0.68 but also far more subject to measurement error due to its low light output. With all dE values above 3 falling in colors that are predominantly blue, and the grayscale being very neutral, color is overall pretty good on the ASUS. It’s not ideal of course, but it is better than the overall number of 1.80 might lead us to believe.

Color Tracking - XR Pro and Xrite i1D2

The result for 100 nits is almost identical. The dE is 1.86 on average, with a very good grayscale and issues with the blue samples that fall outside of the sRGB colorspace or at the edge of it. The LEDs don’t seem to discolor at higher or lower output levels, which is also good.

ASUS ML248H: Introduction and Hardware Impressions ASUS ML248H: Color Uniformity and Gamut
Comments Locked


View All Comments

  • Zolcos - Thursday, October 27, 2011 - link

    I would agree except for the fact that if they stopped reviewing any 16:9 or TN, they'd have practically nothing left to talk about in today's LCD market.
    That horrendous bezel can be a DQ imo though
  • DarkUltra - Thursday, October 27, 2011 - link

    If it had been 120hz, i'd be interested. The best 120hz monitor on the market is gone, and I'm looking for a replacement (didn't get to buy it while it was available in my country). The LG w2363d had everything, excellent calibration results, zero input lag, OK black levels so you see whats in the shadows and no sharpening problems.
  • radium69 - Thursday, October 27, 2011 - link

    That "thing" aint got nothing on my laptop screen.
  • 63jax - Thursday, October 27, 2011 - link

    why should anybody buy a TN shit when IPS is cheap and eons away from TN, don't be fooled by LED, high dynamic contrast ratios and shit like that, just go for an IPS panel, with CCFL if possible.
  • piroroadkill - Thursday, October 27, 2011 - link

    It's OK, I have a Dell U2410.
  • Exodite - Thursday, October 27, 2011 - link

    Because some of us don't care in the slightest about accurate color reproduction?

    I want a cheap, energy-efficient display with a minimal profile that can handle text work, gaming and video.

    TN is still the best bet.
  • Exodite - Thursday, October 27, 2011 - link

    Edit: I'd get the Samsung S22A300B over this any day in the week though.
  • bobsmith1492 - Thursday, October 27, 2011 - link

    Same here. I'm colorblind anyway and am physically incapable of noticing the difference. TNs are faster too. I can definitely see ghosting. My eyes are fast but not very color sensitive so TNs are perfect. They're cheaper too.
  • arthur449 - Thursday, October 27, 2011 - link

    Colorblind is not contrast-blind. I'm quite colorblind, but my HP ZR24w (e-IPS) looks worlds better than my old TN panel.
  • crimson117 - Thursday, October 27, 2011 - link

    Pay so much for a decent video card and games, then accept hideous washed out TN colors to save $50.

Log in

Don't have an account? Sign up now