LG 34UM67: UltraWide FreeSync Reviewby Jarred Walton on March 31, 2015 3:00 PM EST
LG 34UM67 Display Uniformity
Given the size of the display, creating good uniformity can be difficult. Most of the display does reasonably well, with the corners tending to vary a bit more the center. The left side of our sample in particular looks a bit dim, but it’s only something you really notice when you look for it.
Starting with white uniformity, the center ends up being close to the brightest area, when most other sectors dropping off slightly. The center portion along with the bottom are all within 10%, which is a good result, but the top left and right corners fall off by up to 15%. Professionals would appreciate better uniformity overall, but for gaming the LG 34UM67 works well.
Black uniformity interestingly is a bit of a reverse from the white, with many areas showing slightly higher black levels than the center. However, our i1 Pro is not the best device for measuring black levels and the actual difference between 0.315 cd/m2 and 0.387 cd/m2 isn’t all the great when looking with your physical eyes, even though it’s a 23% difference. There’s a lot of variability in the charts, but mostly the corners seem to be the biggest outliers.
Compared to our earlier calibrated results, or uniformity contrast measurements have all fallen off quite a bit. Our measured contrast this time ranges from 465:1 on the bottom-right corner to as high as 662:1 just above the center, but I think most of the black levels were measured too high so the contrast results are only moderately useful.
Delta E shows similar uniformity again. The top-left edge and top-right seem to have the greatest variance, but for a non-professional display most of this discussion is academic.
The short summary is that uniformity on the LG 34UM67 is good but not exceptional. There will obviously be differences between panels, so where we had problems primarily on the corners and left/right edges, other displays may show more or less issues. Perhaps the most telling aspect is that prior to testing uniformity, I looked carefully over the display with a variety of solid background images to see if I could detect any problems. There are some very minor discolorations that show up primarily when viewing pure white, but the size of the display makes the corners more of an acute viewing angle so it often feels like that’s as big of a problem as display uniformity.