1. What does "P" (e.g., P2, P4) mean?
"P" stands for Pixel Pitch—the distance in millimeters between the centers of two adjacent pixels. A smaller number (like P2) means pixels are closer together, resulting in a sharper image for closer viewing. A larger number (like P8) is for longer viewing distances.
2. How to choose the right Pixel Pitch?
Your main guide is the average viewing distance.
Rule of Thumb: Optimal Viewing Distance (meters) ≈ Pixel Pitch (mm) × 2 to 3.
Indoor, Close Viewing (< 3m): Use P1.2 - P2.5 (e.g., boardrooms, retail).
Indoor, Medium Viewing (3-10m): Use P2 - P4 (e.g., lobbies, stages).
Outdoor, Long-Distance (> 10m): Use P5 - P10+ (e.g., billboards, stadiums).
3. SMD vs. GOB vs. COB: What's the difference?
These are different LED packaging technologies:
SMD (Surface-Mounted Device): The standard. Individual LED chips are packaged into tiny lamps and mounted on the board.
Pros: Cost-effective, excellent color.
Cons: Less protection from impact/moisture.
COB (Chip-on-Board): LED chips are mounted directly onto the board and coated.
Pros: Highly robust, best protection, great heat dissipation.
Cons: Higher cost.
GOB (Glue-on-Board): An enhanced SMD process where a protective epoxy layer is added over the LEDs.
Pros: More durable than standard SMD, good protection at a lower cost than COB.
4. Key differences between Indoor & Outdoor Displays
They are built for different environments and are not interchangeable.
Feature Indoor Display Outdoor Display
Brightness Moderate (800-1,500 nits) Very High (≥5,000 nits)
Weatherproofing Low or None High (IP65-rated for full waterproof/dustproof)
Viewing Distance Closer (smaller Pixel Pitch) Farther (larger Pixel Pitch)
Construction Lighter, simpler cooling Heavy-duty, often with air conditioning
Warning: Using an outdoor screen indoors is too bright. Using an indoor screen outdoors will cause it to fail quickly.
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