The uniformity of the background lighting (backlight) is the second focal point after brightness and contrast. Here we see the models of AOC perform very neatly here; the lowest measured white value in 15 segments is 90% of the highest measured value for the G2790PX and the G2590VXQ. For the G2590PX, it is 87%, which is still very good. In particular, the difference between the cheap G2590VXQ and its competitor at Iiyama, the G2530HSU, is remarkable.
The differences in average values are smaller - no screen is doing really badly here, but even then, the newcomers to AOC are at the top.
- White: lowest vs. highest
- White: average vs. highest
In the uniformity of black, the G2590VXQ distinguishes itself positively again. This is considerably less true for the G2790PX and the G2590PX, where we see a lot of difference between the highest and lowest black values.
- Black: lowest vs. highest
- Black: average vs. highest
This uneven illumination of black is the most visible on the G2790PX, which is why we took a picture of that model in the dark when displaying a black screen:
This is not something you will have a lot of trouble with in practice, but it is something to take into account when you want to watch 2.39:1 super-wide-screen movies or do other things where deep black around the edges is desirable.
Below you can see all three AOC screens screenshots of the detailed measurements. Please note that the colouration of the boxes in the uniformity of black, white and contrast is related to the results of the partial measurements on the model concerned, and not to absolute values.
- For tests of the depth of black, the lower the measure value the better (greener graph), the higher – the worse (redder graph).
- For white, the colour coding is different, as we set the screens to a specific brightness of 150 cd/m². So, the closer it comes to the “true white” the greener value graph and the further away – the redder the graph.
- In contrast results, the highest contrast is green and the lowest is red. Anything in between will be coloured closer to the corresponding polarity colour. The relative value for good contrast is 1702:1, but if the result is 2581:1, the first value will become red instead.
- In the colour temperature tests, the values are marked blue if they are too low and yellow if they are too high.
- Additionally, the colour deviation: here we show tables with DeltaE value, where the value of 3 is almost visible to the naked eye and the colour of the box shows which colour the greyscale leans towards.