Huidu is one of the most widely used manufacturers of sending and receiving cards for LED displays. Most integrators reach for Huidu control cards on LED video wall, LED panel, and LED totem projects. This article explains how to manage a Huidu-controlled LED display with SignOS Digital Signage.
How an LED display architecture works
An LED display doesn't connect directly to a media player. Huidu control cards form the bridge in between: the video source (a computer or an Android-based player) connects to the Huidu sending card over HDMI or DVI, and the sending card distributes the image to the receiving cards mounted on the LED modules. In this architecture, the source device just sends a picture to the display like it would to a normal HDMI monitor - pixel mapping and synchronization on the LED side is handled by the Huidu hardware.
Where SignOS fits in
The SignOS player takes on the video-source role in this architecture. When you connect a SignOS player device (Android box or PC) to the Huidu sending card over HDMI, the LED display becomes just another signage screen as far as SignOS is concerned. The Huidu card handles resolution and pixel mapping on its side, while SignOS handles content management, scheduling, and remote sending.
Setup steps
- Set up the Huidu side first: configure the sending and receiving cards with Huidu's own software (e.g. HDPlayer/HDLinkPro) and set the display's total resolution and pixel mapping there.
- Connect the SignOS player: connect the SignOS player's HDMI output to the Huidu sending card. The player should output at the resolution configured on the Huidu side.
- Pair the screen in SignOS: the player shows a pairing code on first boot - enter it in the SignOS dashboard to add the screen to your account.
- Build a playlist and send it: prepare content for the LED display's actual resolution and aspect ratio, add it to a playlist, and send it to the screen.
What to watch out for
Unlike a standard monitor, an LED display's resolution depends on the number and layout of its modules, which can produce unusual aspect ratios (say, 3 rows by 5 modules). Preparing content for that real resolution matters for image quality. For large or high-module-count displays, Huidu typically recommends a sync card - in that case the player's HDMI output connects to the sync card, and the sync card connects to the sending card. Settings vary by card model and firmware, so we recommend checking Huidu's own documentation for your specific hardware.
The advantage of managing an LED display with SignOS
Once connected, the LED display behaves like any other screen in the SignOS dashboard: content is sent over the network, you can set up a publishing plan weeks in advance, and you can update the playlist in a few steps. SignOS's built-in apps (Instagram, YouTube, queue display, Excel/PDF/Word) and API support work the same way on the LED display too - the LED hardware is just the layer that carries the image to the physical modules, while content management stays entirely in SignOS.