Our new test method gives even more insight into the colour quality.
To start off we look at the coverage of the sRGB colour space of the GB2783QSU-B1, directly out-of-the-box. This is 97.8%, which is definitely not bad for a monitor with a tn-panel.
Secondly we look at the colour temperature of white using the standard setting. On the previous page you could already see the variations in this with the checkboard, where you could see that all values ended up far below 6500K. This is also seen in the middle of the monitor: we measure 5905 K. This is slightly below the lower limit of 6000K that we retain for a ‘good’ judgment, but not that bad that it is a real negative – we keep our conclusion on this on solid, with the caveat that the colour quality is slightly warm. The ProLite B2783QSU-B1 had a value of 6300 K, which is a lot better.
We were already measuring the colour- and grayscale value deviation based on the CIE2000 norm (we used the CIE1994 norm for a long time), but with the new test method we also add in the standard deviation. Simply put this gives an indication of the amount at which the sub-measurements that the average deviations are based on, deviate from the average measurement. Aside from that the averages are now based on a bigger number of sub-measurements. These can be found with the screenshots for every tested product. There you can also find the so-called saturation sweeps, that show to what extent the head- and support colours, meaning RGB and CMY, deviate from the desired values in a continuum.
We see a slightly bigger deviation here than with the two monitors based on an ips-panel, but for a tn-monitor a DeltaE value of 4.37 is not that bad. Furthermore the standard deviation is reasonable, which means that the individual sub measurements do not fluctuate all that much. The ‘business’ B2783QSU-B1 had an average deviation of 3, but that value was based on significantly less sub measurements and therefore not comparable.
The result of the grayscale deviation results in about the same, and is for example slightly better than the ips-based AOC Q2781PQ.
Below you can find the colour triangle with the colour checker, gamut coverage and saturation sweep measurements in three modes. Note that the colour quality of the GB2783QSU-B1 might not be perfect, it is certainly not bad.
The measured gamma value of the GB2783QSU-B1 is slightly low, which results in detail loss in lighter parts of the image. Furthermore the standard deviation of the sub measurements is also a bit too high. The screenshot of the graph of the measurement clearly shows that the curve is far from ideal. The gamma value of the ProLite B2783QSU-B1 was clearly better with an average of 2.25.