Everything you need to know About Video Walls

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VIDEO WALLS: WHERE TO USE THEM AND CHOOSING YOURS

In its simplest form, Video Walls are used to create large images by arranging monitors in an array to display one large, high resolution, digital surface.

More advanced video walls will allow you to display multiple sources, simultaneously, anywhere on the wall. These advanced displays do not limit the content to within the boundaries of the individual displays, but even allow you to straddle one or more displays.

Video wall displays can also be arranged in different ways to create unusual shapes, which would not be possible with single displays. They could for example be arranged in a 1 by 5 array to give you a panoramic effect.

Some video wall monitors allow for mounting in a vertical or portrait orientation. This is useful when installing in confined areas or for creating interesting effects.

It is seldom a requirement for video wall monitors to be higher than high resolution (1920 x 1080). Each monitor that is added, adds to the overall resolution of the wall. Therefore a 2x2 video wall made up of HD monitors has an overall surface resolution of UHD.

WHERE ARE VIDEO WALLS USED?

Video walls have many applications across many verticals, but are almost exclusively limited to indoor installations.

Some of their most common uses would be:

  • Control room – Where a lot of data is viewed by several operators at the same time. This could be in network operating centres, disaster centres, command centres and even call centres
  • Retail – Shopping centres or in the shops for advertising, promotions or events
  • Signage – For displaying information in airports, transport hubs and corporate spaces
  • Entertainment – Live Sports broadcasts, music concerts and casinos
WHAT ARE THE MOST IMPORTANT CONSIDERATIONS WHEN CHOOSING VIDEO WALL MONITORS?

There are a lot of options to consider when selecting the correct solution for your video wall project.

Here are some of the most important considerations:
  • Duty cycle – Not all video wall monitors are designed to run 24 hours a day for 7 days a week. In many applications this is a definite requirement. Make sure that you do not use monitors that are rated less than 24/7 in these applications as it will render the warrantee invalid. Bear in mind that almost every monitor includes a built in operating hour meter.
  • Brightness – In most video wall applications the displays will be indoors and in controlled lighting environments. In these instances a brightness of 400 to 500 nit would be perfectly adequate. In high ambient light conditions consider monitors with 700 nit or higher.
  • Resolution – In virtually every instance a resolution of anything more than HD would be a waste
  • Bezel width – Video wall monitors are offered with varying bezel widths. This is measured in different ways, depending on the manufacturer. The most accurate measure would be ‘content-to-content’ or ‘image-to-image’ which will take into account any air-gap or non-uniform bezels (e.g. sometimes the top bezel is a different width to the bottom). Generally the narrower the bezel width, the better as this will cause less interference of the overall image. Bezel width is more important when viewing detail on smaller video walls, as information can be “lost” in the bezel. In some applications such as digital signage large bezels (even up to 20mm is acceptable) and can even be aesthetically pleasing to the overall look.
  • Calibration – Video wall monitors must be accurately calibrated in order to give a uniform look and to display the content accurately. This includes brightness, contrast and colour. Consumer displays should be avoided as they do not include the ability to accurately calibrate them.
  • Image orbiting – This function is built into most professional video wall monitors. It is an algorithm that is built into the firmware which slowly and imperceptibly orbits the image. This is to reduce image retention effect which happens when static images are displayed for extended periods on a display.
  • Built in video wall processing – This is useful and can save money when the requirement is only for a single source to be displayed
  • Video loop through – This is a feature whereby a single input can be looped through (or daisy chained) to each of the displays. This makes for a neat installation, reduces the points of failure and saves on the cost of additional video distribution amplifiers and cables. This feature is used in conjunction with the internal processor to create a single large image.
THE ProSpectre ADVANTAGE

ProSpectre video wall monitors include all of the features that you would expect of a professional video wall display and include the following:
  • Video wall monitor size – available is 49 inch or 55 inch displays
  • Bezel width – ProSpectre video wall monitors are available with content-to-content bezel width from a very impressive 1,8mm (extra-narrow bezel) and 3,8mm (ultra-narrow bezel)
  • Brightness – Available from 450 nit, 500 nit and 700 nit depending on the model
  • Image orbiting – Every ProSpectre video wall display includes this feature
  • Warrantee – Two years standard warrantee with the option to extend to five years
  • Wall mount brackets – Fully adjustable, front access wall mount brackets are included free of charge with every ProSpectre video wall monitor
  • Signal loop through – This feature is included in every ProSpectre video wall monitor. It can either be HDMI or Display port (must be specified at time of purchase)
  • Robust design – ProSpectre video wall monitors are housed in a steel cabinet and includes handles to aid transport and installation. Special care should be taken during transportation and installation due to the very narrow bezels
FOR EVEN MORE FUNCTIONALITY CONSIDER ADDING THE FOLLOWING:

> Videowall processor – GALAXY processor to allow for multiple inputs, streaming

> Touch panel control system – Kramer control

> Kramer room connectivity -  Cables and connectors

> Kramer Video switchers and distribution amplifiers

> Kramer Range extenders