How to Configure LED Display Receiving Cards and Video Processors

When you are setting up an LED display, you must know properly configuring the receiving cards and video processors for optimal performance, image stability, and system compatibility. Today, Doitvision will provide a step-by-step guide about how to determine the right configurations.

Step 1: Determine the Pixel Count per Module

The first step in configuring an LED screen system is to calculate the pixel count of each module, since different models of LED modules vary in their pixel arrangements. Pixel count refers to the total number of LEDs on a module.

Let’s explore some common module types:

P2.5 Module (320mm x 160mm):

Pixel count = (320 ÷ 2.5) × (160 ÷ 2.5) = 128 × 64 = 8,192 pixels

P1.86 Module (320mm x 160mm):

Pixel count = (320 ÷ 1.86) × (160 ÷ 1.86) ≈ 172 × 86 = 14,792 pixels

P3 Module (192mm x 192mm):

Pixel count = (192 ÷ 3) × (192 ÷ 3) = 64 × 64 = 4,096 pixels

Step 2: Define the LED Screen Size

After determining the pixel density of the module, the next step is to calculate how many modules are needed to build the desired display size.

For example, for a 2.08 meters high by 3.84 meters wide screen if using P1.86 modules:

Module size = 320mm x 160mm

Vertical module count = 2080mm ÷ 160mm = 13 modules

Horizontal module count = 3840mm ÷ 320mm = 12 modules

Therefore, the full screen consists of 13 (height) × 12 (width) = 156 modules.

Step 3: Choose the Right Receiving Card Model

LED modules typically come with either 75-pin or 320-pin interfaces:

75-pin interfaces are standard for regular modules.

320-pin interfaces are usually used for fine-pitch LED displays.

Receiving cards are available in several port configurations,like:

• 8-Port
• 12-Port
• 16-port.

Let’s revisit the above example with P1.86 modules:

Each column contains 13 modules vertically.

To ensure stability and simplify wiring, it’s optimal to use 16-port receiving cards, assigning one card to each column (i.e., 12 cards total).

If the screen height increases to 22 modules, you can configure each column with two 12-port receiving cards instead.

Important: When selecting a receiving card, make sure its loading capacity matches the total pixel load of the modules it controls, while also considering cost efficiency.

Step 4: Calculate Total Pixel Load and Select a Video Processor

With the full screen layout in place, you can calculate the total pixel count:

Each module: 172 × 86 = 14,792 pixels

Total modules: 13 (height) × 12 (width) = 156

Total screen pixels = 14,792 × 156 = 2,307,552

Assuming a standard video processor has 4 network ports, and each port supports up to 650,000 pixels, a 4-port processor would support up to 2,600,000 pixels in total.So, it is enough for this configuration.

Validation Check: Per-Port Pixel Load

Now let’s verify that no single network cable exceeds the 650,000-pixel limit.

We divide the screen into 4 zones (one per network cable):

Horizontal modules per zone = 12 ÷ 4 = 3 columns per cable

Pixel load per cable = 172 × 86 × 13 × 3 = 576,888 pixels

Since this is under the 650,000-pixel threshold, a 4-port video processor is suitable.

When to Upgrade to a 6-Port Processor

Now consider a larger screen made of 13 x 13 P1.86 modules:

Total screen pixels = 172 × 86 × 13 × 13 = 2,499,848

This total is still under the 2.6 million pixel limit for a 4-port processor.

However, each cable must handle:

13 columns ÷ 4 = up to 4 columns per cable

Pixel load = 172 × 86 × 13 × 4 = 769,184 pixels

This exceeds the 650,000-pixel limit for a single port.

In this case, you must upgrade to a 6-port processor, and each cable handles no more than 3 columns (i.e., 172 × 86 × 13 × 3 = 576,888).

Invalid Configuration Example

A flawed setup might use two 8-port receiving cards per column, with each controlling 7 and 6 modules respectively. Let’s calculate the maximum load:

Highest pixel load per cable = 172 × 86 × 7 × 7 = 724,808 pixels

This again exceeds the 650,000-pixel threshold, rendering the configuration unviable. A 6-port processor becomes necessary for safe operation.

Final Considerations

Even if the total screen pixel count fits within the video processor’s capability, it’s essential to ensure:

Each port (network cable) doesn’t exceed its pixel limit (usually ~650,000).

The receiving card can handle the pixels of the modules it’s assigned to.

Cabling is logically divided for signal and power redundancy.

You consider cost-performance balance when choosing between different configurations: Such as fewer higher-spec receiving cards or more lower-spec ones.

Conclusion

LED display systems configuration is not just about matching pixels to hardware. It’s about optimizing performance, cost, and long-term reliability. Please always verify both total and per-line loading capacities before finalizing your system setup.

For larger or more complex screens, you can consult us to get real-time load calculations and suitable processor.