The P3.9-7.8 Curtain wall screen is a specific type of LED display designed for installation on curtain walls or building facades. As you mentioned, the product name "P3.9-7.8" represents the pixel pitch of the LED screen, specifying different values for the horizontal and vertical distances between the individual lamp beads (LED pixels).

1. P3.9 Pixel Pitch: The value "3.9" refers to the horizontal distance between the centers of two adjacent lamp beads (pixels) on the LED screen. In this case, it is approximately 3.9 millimeters. Smaller pixel pitches, such as P3.9, indicate higher pixel density, resulting in higher resolution and sharper image quality, especially for viewers who are in close proximity to the display.

2. P7.8 Pixel Pitch: The value "7.8" refers to the vertical distance between the centers of two adjacent lamp beads (pixels) on the LED screen. In this case, it is approximately 7.8 millimeters. The vertical pixel pitch may be slightly larger than the horizontal pixel pitch, which can be an intentional design choice for certain applications or to achieve a specific aspect ratio for the display.

3. Curtain Wall Screen: The P3.9-7.8 LED screen is designed specifically for installation on curtain walls or building facades. It can transform the building's exterior into a dynamic and eye-catching display, allowing for various visual effects, animations, and information to be showcased.

4. High Brightness and Contrast: The LED screen maintains high brightness levels and contrast, ensuring that the displayed content remains visible and vibrant even in daylight or well-lit environments.

5. Weatherproof and Durable: LED curtain wall screens are typically designed to be weatherproof and durable, with protection against elements such as dust, water, and UV rays, ensuring reliable performance in outdoor environments.