Video wall

Video Wall Monitors

The most common type of video wall uses LCD monitors as modules. In video walls, special monitors with a thin frame (narrow bezel) are used, which make the image visually almost uniform. Plasma screens are currently practically not used in video walls.

Monitors for video walls, as a rule, have a built-in image management module, which allows you to program the image on the monitor for operation in video wall mode. The video signal from an external source is fed to one monitor, which is connected to all other cables. Each monitor is programmed to display a specific image segment, which in total gives a complete picture.

Frame for video walls

The frame is designed for mounting monitors on it, and, as a rule, is manufactured separately. Some models of monitors for video walls have built-in mounts that make it easy to connect monitors to each other in a video wall for outdoor installation without an additional frame. The frame itself is a supporting structure and is mounted on the floor, wall or ceiling.

Video Cube

The video cube (projection module) is the main component of the video wall. The video cube is a rear projection video system module that is equipped with an amplifying screen. The main indicator of the capabilities of the video cube is the "information capacity" ( resolution ), which determines the ability to display different volumes of visual information. The 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 of several modules (n modules horizontally and m modules vertically) has a total resolution greater than the base cube by n and m times, respectively. The brightness and contrast of the image of cubes is practically independent of ambient light, and the modular construction principle allows you to create the optimal configuration for each specific room. Video walls are always equipped with cable routes for safe and convenient operation. An important advantage of the video wall is the possibility of frontal access, this allows you to service and replace any monitor without dismantling the others.

Controllers

Using specialized controllers on the video wall, various scenarios for displaying information (image migration on the screen, picture-in-picture , etc.) from video sources: personal computers , video recorders , video surveillance cameras , broadcast media channels, via video conferencing channels can be displayed communication , etc.

Controllers for video walls can be software and hardware.

The software controller is an industrial computer running Windows or Linux . The advantage of software controllers is the ability to output large-format materials in a resolution that matches the resolution of a video wall. In addition, data for visualization on the software controller can come from other sources of information, both through analog input ports and through digital. External sources are displayed in individual windows, which can be freely scaled and freely positioned within the split screen of the video wall.

In hardware controllers, an image is formed using a set of specialized microprocessors . It is impossible 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 split screen of the video wall. Such controllers have a high level of information security and are more resistant to failures.

Installation of video walls is carried out in several stages. The first is a clear definition of the mounting options for the video wall and the assembly / installation of this mount, it can be a floor mount, wall, hanging or a combination of several options, it must be said that this mount is the most difficult to perform.

The second is switching professional panels between each other or connecting each panel with separate cables from the video wall controller.

The third is the thin alignment of the panels relative to each other, in order to make the panels the general plane of the video wall in level, without protruding corners, the gaps between the panels are larger than those that are expected according to the instructions. Here it must be added that such alignment cannot be done on simple household fixtures, only professional fixtures will achieve the best result.

The fourth stage is commissioning, when already working professional panels are combined into a single screen, these settings are made either in the panels themselves or on the video wall controller connected to the panels.

The fifth stage is the calibration of the video wall to bring all its panels to the same brightness and color gamut. Calibration can be performed using the built-in settings in the panel, unfortunately, these settings are not always possible to get the desired result, even the same panels, but the deliveries selected from different batches may differ in color or brightness from each other and to bring them to a single display need a special calibrator.

Video walls are Digital Signage and are often used for educational purposes, at exhibitions, in shopping malls, at concert venues, as well as in advertising ( Digital Indoor ).

Also at facilities where constant monitoring, monitoring and operational analysis of large volumes of graphic, text and video information is required, in anti-crisis and situational centers , dispatch rooms of industrial enterprises, at financial exchanges, in conference rooms of corporate and state organizations.