Older display technology like DLP/LED rear projection cubes for video walls are still considered to be the gold standard, however they can be relatively expensive and take more maintenance than the latest LCD video walls. Front projectors run hot, burn expensive lamps frequently, and as a rule have lower resolution which is important when displaying small text and symbols. These are driven by a processor which accepts a variety of input sources. Hardwire switchers are considered outdated because of their limitations and they can be bulky and expensive relative to their performance. Modern LCD video walls are the preferred technology for demanding mission critical environments; they have overall high resolution with relatively lower initial investment lower maintenance costs and longevity.


An Overview 
There are a variety of display technologies on the market, but modern LCD video walls are the best investment relative to cost, maintenance, longevity and return on investment. The latest ultra-thin screen mullions make LCDs competitive with the thinner mullion DLP cubes, but the difference in width is adequate for most control room requirements. From a functional perspective, these with their internal video processors, can acquire more sources, display more information and manage more information than any other method. This means better and faster decision-making.

That said, no technology is perfect so there is a trade-off. LCD panels don't last forever and when a panel fails, it is typically replaced rather than repaired. The potential problem is availability of a matching replacement. Technology is changing and products go on and off the market frequently as do the manufacturers. For this reason, buying several replacement panels is a good idea.

These are the most popular of the display technologies for the reasons mentioned, however the most obvious, but less emphasized is the depth. These panels can be mounted on the wall with an approximate 7" depth or mounted in a 12" deep cabinet. Compared to its DLP cube competitor, it's a good foot and half shallower and in a small control room the difference of 12" in depth could make a difference.

To conclude, if you're shopping for a video wall for your control room and want one that will hold up under continuous use 7/24, you won't find much choice within the ultra-thin mullion market. However, when shopping, don't focus on the displays, look at the video wall as a performance system and match the best LCD panel to that system. An integrator specializing in control rooms should be able to assist you with your selection. These are a sizable investment, so it's important to take the time to make your evaluation.