LED Controllers & Video Processors: Complete Guide
Novastar, Colorlight, Brompton — understanding the brains of an LED display system.
The controller is the brain of an LED display system. It receives video signals, processes colour calibration, drives the receiving cards, and manages brightness. Choosing the wrong controller degrades image quality regardless of how good the LED modules are. This guide covers the major controller families and how to spec them.
Key Facts at a Glance
- Market leader
- Novastar (Nova) — most widely deployed worldwide
- Alternative
- Colorlight — cost-effective, widely used in mid-range installs
- Broadcast premium
- Brompton Technology — HDR, wide colour gamut, SMPTE 2110
- Max resolution
- Nova MCTRL4K — 4K × 2K per card
What Does an LED Controller Do?
The LED controller (also called a sending card or sending box) is the master processing unit that: (1) receives video input (HDMI, DisplayPort, DVI, SDI), (2) applies colour calibration and gamma correction to each individual pixel, (3) distributes the processed signal to receiving cards mounted inside LED cabinets via Ethernet cables, and (4) manages brightness, refresh rate, and power scheduling. Without a controller, an LED display is simply a grid of inert pixels.
| Novastar Model | Max Output Resolution | Refresh Rate | Best For |
|---|---|---|---|
| MCTRL300 | 1,920 × 1,080 | 1,920 Hz | Small indoor installs |
| MCTRL600 | 2,048 × 1,200 | 3,840 Hz | Medium indoor displays |
| MCTRL4K | 3,840 × 2,160 | 3,840 Hz | Large video walls, broadcast |
| MX40 Pro | 10,240 × 6,400 | 7,680 Hz | Mission-critical, broadcast |
| VX600 | 3,840 × 2,160 (all-in-one) | 3,840 Hz | Mid-size installs, simplified setup |
Receiving Cards
Receiving cards (also called receiving boards) are installed inside each LED cabinet and receive the processed video signal from the sending card via standard Cat5e/Cat6 Ethernet cables. Each receiving card drives a specific number of pixels — typically 320,000 to 655,360 pixels per card depending on the model. For large video walls, multiple receiving cards are cascaded. Novastar A8s and MRV328 are the most widely deployed receiving cards in professional installations.
All Yotta Pixel installations use Novastar controllers and matching receiving cards to ensure full compatibility, colour calibration accuracy, and long-term firmware support.
Brompton Technology for Broadcast
Brompton Technology controllers are the premium choice for broadcast studios, virtual production stages, and live events where colour accuracy is non-negotiable. Brompton's Tessera SX40 supports SMPTE ST 2110 IP video, HDR10, HLG, and per-pixel calibration with measurement data from a Brompton-certified calibration camera. This eliminates moiré, reduces on-camera reflection (SeamlessMode), and ensures the display colour space precisely matches the camera's sensor response.
Frequently Asked Questions
Can I use any controller with any LED display?
No. Controllers must be compatible with the receiving cards in your LED modules. Using mismatched hardware causes colour corruption, refresh rate issues, and potential hardware damage. Always specify matching controller and receiving card pairs.
How many controllers do I need for a large video wall?
One controller can typically drive 3–8 million pixels depending on the model. For a 10 × 5 metre P2 wall (25 million pixels), 3–4 MCTRL4K cards operating in a cluster are required.
What is the difference between a controller and a video processor?
A controller manages the LED panel timing and calibration. A video processor handles input switching, scaling, cropping, and content management. Professional installations use both — a video processor feeding processed signal to the LED controller.
Ready to Specify Your Display?
Our engineers will translate these specifications into a precise recommendation for your space.
Get a Free Consultation