Of course we have high expectations of the uniformity, considering the effects on brightness and contrast of the optimization-setting on the Dell U3417W. Uniformity, or the evenness of the backlight behind the lcd-panel, is not a strong point for most ultrawide monitors.
Fortunately we see that this setting truly has an effect with the Dell U3417W. The difference between the highest and lowest measured white values (as a reminder: we measure at 15 points) is exceptionally small, the difference between the average and highest white is even smaller. Here we see that the Dell outperforms the Asus MX34VQ that was tested in the same way, although we have to mention that the values of that monitor are not bad considering the type of monitor we are dealing with here.
With the uniformity of black the difference is even bigger. Although black is brighter than we would like for a good contrast across the board, it is very even. For the colour fidelity this is a massive advantage.
For the detailed measurements we have test results both with the uniformity compensation on and off. First we show the results when it is turned on, then when turned off. The difference is clearly visible, but you can also see that ‘off’ is not bad whatsoever. However, especially the brightness of the left side is less.
Bear in mind that the colour in the boxes with the uniformity of black, white and the contrast is related to the results of the measurements for that model; not to the absolute values.
Uniformity compensation On:
Uniformity compensation Off:
- As for black: the lower the measured value, the better (=greener); if the value is higher this means worse (=redder).
- For white the colour coding is different, because there we set a specific brightness of 150 cd/m². That is why values that are closer to this setting green, values that are further away become red – the more they deviate the redder they are.
- As far as contrast is concerned, the highest contrast is green, the lowest is red – the values in between are marked by these colours. Greener is better, redder is worse. We emphasize again that these values are relative: a contrast of 1702:1 is excellent, but if the highest measured contrast is 2581:1, the former value is still marked in red.
- With the colour temperature the measurements are bluer the lower they are, yellower the higher they are.
- Last but not least the colour deviation: here you see a number for the DeltaE value in the boxes, where values below three are barely noticeable with the naked eye. The colour of the boxes shows the colour deviation of gray.