What is a Video Wall?
Video wall is any large electronic display of an image or images being displayed in a presentation format. Typically multiple display devices are tiled together as close as possible in a matrix to create a single logical screen (The Video Wall). Then with special Video Processor devices, an image is scaled across the logical screen or multiple images are spread out over the logical screen or a combination of both in the case of picture in picture. This is all without respect for the individual display devices physical boundaries.
The individual display devices can be anything from the smallest (4″ diagonal) direct view LCD screens to very large (120″diagonal) front or rear projection devices depending on the ultimate size of video wall being created by the matrix.
The First Video walls/History
ØThe videowall emerged in the early 1980s, but two obstacles limited the performance of early videowalls.
ØThe first videowalls were all based on standard CRT monitors, typically 28 inch diagonal, with the resulting large gap between image sections.
ØIt was difficult to achieve the “image split”, that is the means by which a single input video signal could be split into, say, 16 separate image signals to produce one large image on a 4 × 4 array of monitors.
Why a Videowall?
A videowall typically requires a significant investment, and is often the most expensive line item in a facility’s capital outlay for a project. While the videowall functions as a single display, it is always important to remember that it is a system.
Videowall processors are a significant component of the videowall in terms of cost. They provide features common to conventional scalers or video processors, but have greater input, output, and processing capability. The increased number of inputs and outputs creates requirements for many more dimensions of processing and image enhancements, providing greater value.
“A bright, clear image is crucial for a video display. Videowalls present viewers with consist ently bright, inviting images, regardless of size.”
- High Pixel Density
- Creativity with Display Shapes and
- Small Footprint
- Consistent Brightness