Monitors for Video Walls
The most common type of video wall uses LCD monitors as modules. Video walls use special monitors with a thin frame (narrow bezel) to make the image visually almost homogeneous. Plasma screens are practically not used at present on video walls.
Video wall monitors usually have a built-in image control module, which allows you to program the image on the monitor to work in the video wall mode. The video signal from an external source is fed to one monitor, which is connected to all other monitors by cables. Each monitor is programmed to display a specific segment of the image, which together give a complete picture.
Closed Frame for Video Wall
Closed frame – skeleton for mounting video wall monitors and placement of various equipment in the situation room.
Frame for video walls
Frames are designed to mount monitors on them, and as a rule, are made separately. Some models of monitors for video walls have built-in mountings, which make it easy to connect monitors with each other in the video wall for floor installation without additional frames. The frame itself is a supporting structure and is attached to the floor, wall, or ceiling. There is an extensive line of video wall mounts on the market, but among the freestanding or wall-mounted structures, there is a modular solution with a closed frame. In such a cabinet, used in situational centers or control rooms, a place is allocated for video wall monitors, and there are also sections for power, telecommunications, and distribution equipment.
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The video cube (projection module) is the main component of the video wall. A video cube is a module of the rear projection video system, which is equipped with an amplifying screen. The main indicator of video cube capabilities is the “information capacity” (resolution), which determines the ability to display different amounts of visual information. Information capacity of video walls is determined by the number and resolution of projection modules – video cubes, of which it consists. Cubes can have different basic resolutions: XGA (1024×768) or SXGA (1280×1024), SXGA+ (1400×1050) or UXGA (1600×1200). A system built from several modules (n modules horizontally and m modules vertically) has a total resolution greater than that of the base cube by n and m times respectively. Image brightness and contrast of cubes are almost independent of external lighting, and the modular principle of construction allows you to create the best configuration for each specific room. Video walls are always equipped with cable routes for safe and convenient operation. An important advantage of a video wall is the possibility of front access, it allows service and replaces any monitor without disassembling the rest.
Using specialized controllers on the video wall various information display scenarios (image migration across the screen, “picture in picture”, etc.) from video sources can be displayed: personal computers, video recorders, CCTV cameras, broadcast media channels, video conferencing channels, etc.
Controllers for video walls can be software and hardware.
Video wall controller with 4K60 resolution
4K60 resolution video wall controller (3820×2160@60Hz) for high definition video wall projects
The software controller is a Windows or Linux industrial computer. The advantage of the software controllers is the ability to display widescreen material in the same resolution as the video wall. In addition, the data for visualization on the software controller can come from other sources of information, both through analog input ports and digital ones. External sources are displayed in individual windows, which can be freely scaled and freely positioned within the poly-screen of the video wall.
In hardware controllers, the image is formed using a set of specialized microprocessors. It is not possible to run application programs on such a controller, and its main function is to visualize information from a variety of external sources connected to its input ports. External sources are also displayed in individual windows, which can be freely scaled and freely positioned within the poly-screen of the video wall. Such controllers have a high level of data protection and are more resistant to failure.
The latest generation of video wall controllers support not only HDMI 2.0, Dual-Link DVI-D, Display Port, and HDBaseT interfaces but also 4K60 ultra-high resolution (3840×2160@60Hz) for input sources and for panels providing this resolution. This 4K60 display is already in high demand in medical applications, for output from CT scanners and operating room scanners.