| For the sake of this definition, Video Wall, Data
Wall, and Media Wall will all be referred to as a Video Wall. The scope of
this page is to introduce the concept and technology for some types of video
walls. A 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.
LED walls use individual discrete light emitting diodes from .5mm each to
create each pixel. The rest of this article will focus on building video
walls with matrices of complete display devices and not LED technology.
The reason for creating large logical displays in this
fashion is that you can assemble a single logical display area that is
brighter, larger, higher resolution and has inherent redundancy unlike any
other method of image display.
The human brain has the ability through your eyes to
see and comprehend multiple changing messages through images all happening
in real time by scanning each image in some rotation. It is for this reason
that video walls can uniquely present many pieces of information to multiple
people at the same time in the same place.
An example of a single image being scaled or spread
across a 3 wide x 2 high matrix of 50" rear projection "cubes" is
shown below. |
