Color and brightness are of vital importance in control rooms and are critical factors in comparing displays. Most video walls provide plenty of brightness and great colors at the time of installation. But the real challenge lies in maintaining a constant image quality over the entire wall, and over time.
Here, we need to make a clear distinction between Barco products and many competing brands. Many manufacturers don't consider aging effects of their products. This means that the video wall will look great upon installation, but will grow worse over time. So let's first consider the general cases, and then elaborate on Barco's solutions.
LCD technology is popular in professional video wall applications, but also in consumer electronics. However, a television set aimed at consumers has totally different requirements than a control room display. First of all, the family TV does not play 24/7 (unless the family is particularly dysfunctional). Next to that, aging is not really an issue for a stand-alone TV set. If the brightness drops 10% and the colors shift slightly, nobody will notice. If the display is part of a video wall, however, it will not match the brightness and color settings of its neighbors anymore. The result is an unbalanced wall. This can be solved by regular time-consuming (and therefore costly) maintenance visits, which also require downtime. The same goes for projection, by the way.
Direct view LED video walls suffer less from aging effects, but here you have the challenge of batch compliance. Because LED tiles are produced in batch
Things to consider: Are the colors and brightness consistent across the wall? Do you need manual intervention to keep the wall balanced in respect to color and brightness? Will the display units still be equalized (internally consistent) five years from now? Or, even more fundamentally: is it even possible to balance these discrete image generators across an entire wall?