In LED displays, pixel density is a very important concept that directly affects the clarity and display effect of the screen. Let me explain in detail:
1. Definition of Pixel Density
Pixel density is usually expressed by pixel pitch, which can also be understood as the number of pixels per unit area.
Pixel Pitch (P): Refers to the distance between the centers of two adjacent LED pixels, usually measured in millimeters (mm).
For example: P2.5 means the distance between two pixels is 2.5 millimeters.
Pixel density is inversely proportional to pixel pitch: the smaller the pixel pitch, the denser the pixels, and the clearer the display screen.
The formula can be expressed as:
Pixel Density = 1 / Pixel Pitch² (Unit: pixels/square meter)
2. Impact of Pixel Density on Display Effects
Clarity
Small pixel pitch (high pixel density): Image details are clearer, text is sharper, suitable for close-range viewing.
Large pixel pitch (low pixel density): Image appears grainy, suitable for long-distance viewing.
Viewing Distance
The optimal viewing distance of a display screen ≈ Pixel Pitch × 1000
For example, a P2.5 display screen is best viewed at a distance of approximately 2.5 meters.
Cost and Power Consumption
High pixel density means more LED beads, which increases both cost and power consumption.
3. Example Comparison
A display screen with a pixel pitch of P1.5 has high pixel density and is best viewed at a distance of approximately 1.5 meters. It is often used for indoor close-range advertising screens or stage display screens.
A display screen with a pixel pitch of P2.5 has moderate pixel density and is best viewed at a distance of approximately 2.5 meters. It is often used for indoor medium-distance display screens.
A display screen with a pixel pitch of P10 has low pixel density and is best viewed at a distance of approximately 10 meters. It is often used for outdoor large screens or stadium display screens.
✅ Summary:
The pixel density of an LED display screen determines the fineness of the image and the optimal viewing distance. High-density screens are suitable for close-range detailed display, while low-density screens are suitable for long-distance viewing but have lower costs.