Video wall technologies

A video wall consists of multiple computer monitors, video projectors, or television sets tiled together contiguously or overlapped in order to form one large screen. Typical display technologies include LCD panels, LED arrays, DLP tiles, and rear projection screens.

Simple video walls can be driven from multi-monitor video cards, however more complex arrangements may require specialized video processors, specifically designed to manage and drive large video walls. On the front side you just see a big bright picture.

There were many LED video wall on display at AudioVisual 2013. I took a view what they look on the both sides. This one shows a quite typical arrangement used on LED video walls.

av13_td4

On the back side you can see how those things are built from square units that are connected to each other to form a display of needed size. In this specific display the parts on the vertical row were connected together with two wired between every display module. The bigger connector that looks like Speakon connector is actually a PowerCon connector that carries mains power. The power gets to the bottom module and gets though the module to the next above.

av13_td5

Next to the power connector there was another connector that looked outside like XLR connector, but was XLR shell with RJ-45 connector in it. I am not sure what signal format is carried there, but I think it could be Ethernet. The video/picture data seemed to be coming to the video wall with RJ-45 cable.

Video walls are expensive professional hardware, but there are also some cheaper DIY projects in Internet related to video walls. Here are some links to DIY video wall projects for those who want to try to build their own video wall system:

Hackaday.com video wall projects

Giant video walls powered by a Raspberry Pi

Multiple Raspberry Pi boards used to create video wall

DIY LED Video Wall

6 Comments

  1. youtube.com says:

    Genuinely when someone doesn’t know after that its up to other
    people that they will assist, so here it happens.

    Reply
  2. Tomi Engdahl says:

    Massive LED Display Makes Use of Reused Soda Bottles
    http://hackaday.com/2014/03/19/massive-led-display-makes-use-of-reused-soda-bottles/

    What better way to make a giant LED display than out of old empties and bottle crates? This is the Mate Light (pronounced Mah-Tay).

    Anyway, this impressive display makes use of 640 empties arranged in 4 rows of 8 crates for a decent 16 x 40 resolution.

    Reply
  3. Tomi Engdahl says:

    BARCO NX-4 GROUP REVERSING ADVENTURE
    This a project for a group of folks working to reverse engineer the Barco NX-4 LED panels.
    https://hackaday.io/project/27799-barco-nx-4-group-reversing-adventure

    Reply
  4. Tomi Engdahl says:

    MuxLab’s latest AV-over-IP fiber extender delivers uncompressed 4K/60 video globally
    http://www.cablinginstall.com/articles/2018/02/muxlab-avip-fiber.html?cmpid=enl_cim_cim_data_center_newsletter_2018-03-05&pwhid=6b9badc08db25d04d04ee00b499089ffc280910702f8ef99951bdbdad3175f54dcae8b7ad9fa2c1f5697ffa19d05535df56b8dc1e6f75b7b6f6f8c7461ce0b24&eid=289644432&bid=2022539

    MuxLab (Montreal, Quebec) says its AV over IP 4K/60 Uncompressed Extender, Fiber (model 500761) “offers a new twist to an existing favorite [product].” Like MuxLab’s other IP-based extenders, this device delivers 4K/60 video from one or many sources, among one or many displays.

    The unit connects sources to displays through a 10Gig Ethernet Switch, enabling an easy, scalable way to implement virtual matrix switch and splitter configurations. “Massive video walls can be created at nearly any user-defined scale, provided the network bandwidth is available,” according to a company press release.

    MuxLab’s AV over IP 4K/60 Uncompressed Extender, Fiber (model 500761) supports both HDMI and DisplayPort inputs for greater compatibility. The systems’ transmitters and receivers can connect to the Switch using OM4 multimode fiber cable, effectively transmitting up to 1300ft (400m) in distance so equipment can be stored far from the installation and accessed remotely.

    Resolutions up to 4K/60 are supported when using both HDMI and DisplayPort. When uncompressed, zero latency video is delivered at 4K/60 (4:2:0). With light compression and visually lossless latency (less than one frame), video is delivered at 4K/60 (4:4:4).

    The unit supports analog audio alternatives, with the ability to insert two-channel audio on the transmitting side and extract it at the receiver. Both transmitter and receiver come equipped with a 1G Ethernet Switch port to connect network devices. RS232 and IR provide remote control options.

    Reply
  5. Tomi Engdahl says:

    The Pixblasters Video LED Controller
    https://blog.hackster.io/the-pixblasters-video-led-controller-ec692f54535d

    The WS212B-based LED strips have become an almost ubiquitous solution when flashing coloured lights are needed. Despite this, it can be hard to connect large numbers of them together into a single display, which is where the Pixblasters MS1 video controller board might come in handy.

    https://www.crowdsupply.com/pixblasters/pixblasters-video-led-controller

    Reply

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