REVIEW: Dell U2410 Part 6
As a matter of course, the contrast will suffer following reductions of the intensity of the RGB channels (RGB LED backlight screens remain the exception). In the case of calibration to D50 as a white point, we therefore measure a lower value of 660:1.
Brightness and contrast gradient on the Dell U2410.
Unfortunately, no extensive gamma setting is present in the OSD. In light of the electronics on the DELL U2410, this would be a very desirable feature.
We checked the brightness distribution and image homogeneity using a white test picture, taking measurements at 15 points on the screen. This gave rise to the deviation in Luminance in percent and the DeltaE (in this case, identical to the DeltaC) with regard to the value measured in the centre. For the DeltaE, the threshold beyond which a difference can be noticed from 0,5. A DeltaE of 4 should not be exceeded significantly, since otherwise, larger colour tinges can be expected.
The Luminance distribution (left picture) and image homogeneity (right picture) were tested at 15 points on the screen.
The Luminance deviations measured do not indicate the best possible performance, but are still absolutely acceptable for a monitor without a compensation solution. We did not establish any colour tint on our test model, either using our measurement technology or using visual judgement. Thus, here, the DELL U2410 delivers a good result overall.
IPS panels score points especially for their viewing angle stability and are far superior to TN panels in this regard and also slightly better than PVA panels. The manufacturer’s indication is 178° horizontal and 178° vertical. In practice, too, the monitor is fully convincing; the largest changes with a change of viewing angle appear in the dark range. An A-TW polariser would reduce this effect further, but this is not integrated. A violet tint in black such as that which arises in models without polarisers, can only be seen at extreme angles.
The pictures were taken from various viewing angles and show how stable the image display remains.
Below, we carried out detailed measurements on the Dell U2410 before and after calibration and profiling and evaluated the results. The results are especially of interest for electronic image editing. For office use and games, at least sufficient neutrality of the screen is important. The measurements are evaluated using the monitor’s own software, which allows for precise, detailed statements to be made about the test model we used.
First, we measured how well the Dell U2410 covers various colour spaces. As a reference, we used the working colour spaces sRGB, AdobeRGB and ECI-RGB 2.0. In addition, we compared the model with the "ISOcoated_v2_eci.icc" profile. It is based on the FOGRA39 characterisation data and represents the standard printing conditions for Offset printing on particular paper types. The precise conditions can be viewed as a PDF document.
sRGB is the lowest common denominator for interaction between various input and output devices in the Consumer sector. However, in order for the "sRGB chain" to function without colour management, all components involved must fulfil the specifications as precisely as possible or carry out suitable transformations automatically. For a modern inkjet printer, which should generally cover a considerably larger colour space, this means that driver-based conversions must be carried out. A monitor with an extended colour space must have a usable sRGB mode.
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