An Overview of Popular Video Wall Technologies

A video wall is also referred to as a data wall. It comprises a number of display panels tiled together so as to create one large screen. A data wall is connected to a video-wall processor that functions as the brain of the data wall. The processor enables the user to control the data wall using command and input devices such as a keyboard and mouse.
Data walls are a better alternative to a single large screen because they allow users to customize active display areas and are also more cost effective than a single large screen. Modern video walls with Digital Light Processing (DLP), Light Emitting Diodes (LED), and Liquid Crystal Display (LCD) technologies are widely used in control rooms and command centers.
Some common features that are expected from modern video walls are: high performance, compatibility with advanced processors, reliability, and low cost of ownership. This article elucidates the types of modern video walls seen in command centers and control rooms:

• DLP video walls - These comprise rear projection cubes and a video processor/controller. The projection cubes rely on lamps for displaying images. As long as the lamp is in working condition, the projection cubes continue to perform. Lamps used in modern project cubes have a life of around 9,000 hours. Rear projector cubes provide a small footprint - the smaller the screen size the lower the depth, and vice versa. The DLP technology is also considered to be reasonable as compared to LCD technology. High resolution and thin frames are two of the greatest advantages of DLP video walls.


• LED video wall - The LED video-wall technology is similar to the DLP technology. It comprises interlocking rear projection cubes and a video processor. The light sources are the only difference between the LED and DLP technology. LED cubes are relatively more expensive than their DLP counterpart. However, LED illumination provides a sharper image and more brightness. It is also low on maintenance. For 7/24 applications in command centers and control rooms, the new LED-illuminated DLP technology is becoming a popular choice.


• LCD video walls - This display technology makes use of the light-altering ability of liquid crystal to display images. An LCD video wall comprises flat display panels tiled together and connected to a video processor. Backlighting is required for LCD video walls, as liquid crystal doesn't emit light by itself. An LCD video wall displays could either be mounted directly on the wall or it could be integrated into a free-standing cabinet. LCD panels are available in ultra-thin and ultra-light versions reducing space usage. The only drawback of LCD panels is that they might need to be replaced after a certain period.

These are the most preferred video wall systems that are compatible with the requirements of mission-critical operations. The best way to zero in on the most appropriate video wall technology for your application would be by consulting with a reputable audiovisual systems integrator. There are some senior consultants in this industry, and some of them will provide you a free needs analysis.

I have over 20 years experience helping people design and outfit their control rooms. In today's market video wall screens are most commonly used in emergency operations centers for controlling and managing informations. Check out online for right 911 dispatch console andfree needs analysis, space planning and cost estimate.

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