Question

How should the resolution of an LED display screen that is 5 meters high and 9 meters wide be set?

Answer 1

The physical dimensions of an LED display (5 meters x 9 meters) do not directly determine the resolution; the key factor is the pixel pitch (P value). The resolution is calculated as follows:

I. Core Calculation Formula

Resolution = Screen Size ÷ Pixel Pitch

Horizontal Pixel Count = 9 meters ÷ Pixel Pitch

Vertical Pixel Count = 5 meters ÷ Pixel Pitch

Note: The unit of pixel pitch must be consistent (usually "meters" or "millimeters").

II. Resolutions Corresponding to Common Pixel Pitches

Taking a 5-meter x 9-meter LED display as an example, the resolution (horizontal x vertical) and suitable viewing distance for different pixel pitches (P values) are approximately as follows:

P2.5 Pixel Pitch

Suitable viewing distance: approximately 5–15 meters.

Horizontal resolution: approximately 3600 pixels, vertical resolution: approximately 2000 pixels,

Total resolution: approximately 7.2 million pixels. The image is very detailed, suitable for close-range indoor viewing.

P3 Pixel Pitch

Suitable viewing distance: approximately 6–20 meters.

Horizontal resolution: approximately 3000 pixels, vertical resolution: approximately 1667 pixels,

Total resolution: approximately 5 million pixels.  It offers a good balance of clarity and cost, making it a common choice.

P4 Pixel Pitch

Suitable viewing distance: approximately 10–30 meters.

Horizontal resolution: approximately 2250 pixels, vertical resolution: approximately 1250 pixels,

Total resolution: approximately 2.8 million pixels. Often used in shopping mall atriums or outdoor settings.

P5 Pixel Pitch

Suitable viewing distance: approximately 15–50 meters.

Horizontal resolution: approximately 1800 pixels, vertical resolution: approximately 1000 pixels,

Total resolution: approximately 1.8 million pixels. Suitable for video and advertising playback at long distances.

P6 Pixel Pitch

Suitable viewing distance: approximately 20–60 meters.

Horizontal resolution: approximately 1500 pixels, vertical resolution: approximately 833 pixels,

Total resolution: approximately 1.25 million pixels.  Often used for large-area outdoor displays. III. How to Choose the Right Resolution (Key Points)

1️⃣ Consider the Usage Scenario

Indoor meetings / studios / command centers → P2.5 / P3

Shopping mall atrium / exhibition halls → P3 / P4

Outdoor advertising / squares / stadiums → P4 / P5 / P6

2️⃣ Consider the Content

Text, PPTs, detailed content → Higher resolution is better

Videos, advertisements, large screens → Medium resolution is sufficient

3️⃣ Consider Signal Source Matching

Common video aspect ratios:

16:9 (most common)

9 meters : 5 meters ≈ 1.8 : 1 (close to 16:9 = 1.78)

For example:

P4 screen: 2250 × 1250

Can be mapped to 2240 × 1260 or 1920 × 1080 (proportional scaling)

IV. Recommended Solutions (Practical Suggestions)

If you are unsure of your specific needs, you can refer to:

✅ General indoor recommendation:

P3, resolution approximately 3000 × 1667

✅ Outdoor advertising recommendation:

P4, resolution approximately 2250 × 1250

✅ Cost-effective option for long-distance viewing:

P5, resolution approximately 1800 × 1000

Answer 2

To determine the resolution of a 5-meter high and 9-meter wide LED display screen, you need to first clarify the usage scenario, viewing distance, and budget, and then calculate it based on the pixel pitch (dot pitch). The following are the specific steps and suggestions:

1. Determine the usage scenario and viewing distance

• For indoor scenarios (such as conference rooms, exhibition halls), where the viewing distance is relatively short (1-5 meters), it is recommended to choose a small pixel pitch LED screen (such as P1.0-P2.5) to ensure image clarity.

• For outdoor scenarios (such as billboards, stadiums), where the viewing distance is longer (10 meters or more), a larger pixel pitch LED screen can be chosen (such as P3-P10) to prioritize visibility from a distance.

2. Select the pixel pitch (dot pitch)

• Based on the viewing distance and scenario requirements, initially determine the pixel pitch.

For example:

• Indoor close-range viewing (1-2 meters): P1.0-P1.6 can be selected;

• Indoor medium-range viewing (3-5 meters): P1.8-P2.5 can be selected;

• Outdoor long-range viewing (10-30 meters): P3-P6 can be selected;

• Outdoor ultra-long-range viewing (30 meters or more): P8-P16 can be selected. 3. Calculating Resolution

• Use the formula: Resolution = (Screen width ÷ Pixel pitch) × (Screen height ÷ Pixel pitch)

•  Calculations for different pixel pitches are as follows:

• If P2.5 is selected (pixel pitch 2.5mm):

• Horizontal pixels = 9 meters ÷ 0.0025 meters/pixel = 3600 pixels

• Vertical pixels = 5 meters ÷ 0.0025 meters/pixel = 2000 pixels

• Resolution = 3600 × 2000 = 7,200,000 pixels (approximately 7.2 million pixels)

• If P3 is selected (pixel pitch 3mm):

• Horizontal pixels = 9 ÷ 0.003 = 3000 pixels

• Vertical pixels = 5 ÷ 0.003 ≈ 1667 pixels

• Resolution = 3000 × 1667 = 5,001,000 pixels (approximately 5 million pixels)

• If P4 is selected (pixel pitch 4mm):

• Horizontal pixels = 9 ÷ 0.004 = 2250 pixels

• Vertical pixels = 5 ÷ 0.004 = 1250 pixels

• Resolution = 2250 × 1250 = 2,812,500 pixels (approximately 2.81 million pixels)

4. Matching Standard Signal Resolution

• After calculating the physical resolution, select the standard signal resolution that is closest to and does not exceed the physical resolution, such as 1920×1080 (1080p), 3840×2160 (4k), etc., to achieve the best display effect.

Summary and Recommendations:

• For indoor viewing at close range, it is recommended to choose a pixel pitch of P2.5-P1.8, with a resolution of approximately 3600×2000 to 4500×2500, which can present high-definition and detailed images. • For outdoor long-distance viewing, a pixel pitch of P3-P6 can be selected, with resolutions ranging from 2250×1250 to 3000×1667, balancing visibility and cost.

• The specific resolution should be determined based on actual content requirements (such as playing videos, displaying images, or text) and budget.  Prioritize selecting a resolution that matches commonly used signal sources to avoid image stretching or blurring.