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Full color LED display needs to know that knowledge
In today's world, the application of full-color LED displays has become increasingly widespread. From digital billboards to indoor signage, these displays are used in a variety of settings. In this article, we’ll walk you through some essential knowledge that every user of LED display systems should understand.
1. **Point Spacing Calculation Method**
The point spacing refers to the distance between adjacent pixel points. For example:
- P16: 16mm
- P20: 20mm
- P10: 10mm
This spacing directly affects the resolution and viewing experience of the display.
2. **Length/Height Calculation Method**
To calculate the length or height of an LED panel:
**Length/Height = Point Spacing × Number of Points**
For instance:
- PH16: Length = 16 points × 1.6cm = 25.6cm; Height = 8 points × 1.6cm = 12.8cm
- PH10: Length = 32 points × 1.0cm = 32cm; Height = 16 points × 1.0cm = 16cm
3. **Module Number Calculation Method**
To determine how many modules you need:
**Number of Modules = Total Area ÷ Module Length ÷ Module Height**
For example, for a 10㎡ PH16 outdoor full-color LED screen:
10 m² ÷ 0.256 ÷ 0.128 ≈ 305 modules
4. **Visual Distance Calculation Method**
Understanding the optimal viewing distances is crucial for effective display design:
- **RGB Mixing Distance**: LED Full Color Screen Line of Sight = Pixel Spacing (mm) × 500 / 1000
- **Minimum Viewing Distance**: LED Display Visible Distance = Pixel Spacing (mm) × 1000 / 1000
- **Best Viewing Distance**: LED Display Best Line of Sight = Pixel Spacing (mm) × 3000 / 1000
- **Maximum Viewing Distance**: LED Display Farthest Viewing Distance = Screen Height (m) × 30
5. **Scan Mode Calculation Method**
The scan mode determines how many rows are lit at once. Common modes include:
- Indoor single/dual color: 1/16 scan
- Indoor full color: 1/8 scan
- Outdoor single/dual color: 1/4 scan
- Outdoor full color: Static scan
There are two main driving methods: static scanning and dynamic scanning. Static scanning includes real pixels and virtual pixels, while dynamic scanning also has real and virtual options.
6. **Power Supply Calculation Method**
Calculating the required power supply is essential for proper system setup:
- A 5V40A power supply can support approximately 8 modules for a P10 display.
- To find the total number of power supplies needed:
**Number of Power Supplies = Average Total Power / Power per Power Supply**
7. **Display Power Calculation Method**
The basic formula for power is: **P = UI**, where:
- P = Power
- U = Voltage
- I = Current
Typically, a 5V power supply with 30A or 40A current is used.
- Single lamp power = 5V × 20mA = 0.1W
- Unit board power = Single lamp power × Resolution / 2
- Maximum screen power = Resolution × Number of lights per resolution × 0.1
- Average screen power = Maximum screen power / 2
- Actual screen power = Maximum screen power / Scan Mode (e.g., 4-scan, 2-scan, 16-scan, 8-scan, static)
8. **Display Brightness Calculation Method**
The brightness of the entire screen depends on the brightness of each individual LED.
For example, if the screen has 2500 dots per square meter and a brightness of 5000 cd/m², then:
- Red LED brightness = 5000 ÷ 2500 × 0.3 ÷ 2 = 0.3 cd
- Green LED brightness = 5000 ÷ 2500 × 0.6 = 1.2 cd
- Blue LED brightness = 5000 ÷ 2500 × 0.1 = 0.2 cd
- Total brightness per pixel = 0.3×2 + 1.2 + 0.2 = 2.0 cd
9. **Screen Resolution Calculation Method**
To calculate the resolution per square meter:
**Resolution = 1 / (Pixel Pitch in M × Pixel Pitch in M)**
For example, for P16:
1 / 0.016 / 0.016 = 3906 dots/m²
10. **Best Visual Angle Selection**
Different LED types have different viewing angles:
- Indoor SMD0603/0805: H: 160°, V: 120°
- SMD3528: H: 140°, V: 120°
- Outdoor DIP346/546: H: 110°, V: 50°
By understanding these key aspects, you can make more informed decisions when choosing, installing, or maintaining an LED display system. Whether you're working indoors or outdoors, knowing these fundamentals will help you achieve the best visual results.