How to calculate the visible distance of a flexible LED display?

18 views admin 2025-03-28

As we all know, the visible distance of a flexible LED display refers to the maximum and minimum distance range at which the audience can clearly and comfortably view the screen content. This distance range is easily affected by many factors, including the screen's pixel pitch, brightness, contrast, ambient lighting conditions, and the audience's vision. So do you know how to calculate the visible distance of a flexible LED display?

The calculation of the visible distance of a flexible LED display mainly depends on the pixel pitch, screen height, and the resolution of the human eye. The following are some commonly used calculation methods:

Minimum visible distance: Formula: Minimum visible distance = pixel pitch (mm) × 1 (or 1000/1000, that is, converted to meters as units, but usually it is sufficient to calculate directly in millimeters). Note: This is the minimum viewing distance that can clearly display the smooth image of the flexible LED display without producing a sense of graininess. Optimal viewing distance: Formula: Optimal viewing distance = (pixel spacing (mm) × 1000) to (pixel spacing (mm) × 3000) (unit: millimeters). Or converted to meters: Optimal viewing distance = (pixel spacing (mm) × 1) to (pixel spacing (mm) × 3) (unit: meters). Note: Watching the screen within this distance range can obtain a clearer image and a comfortable visual experience. This range is based on the resolution of the human eye and the pixel density of the flexible LED display.

Furthest viewing distance: Formula: Furthest viewing distance = Screen height (meters) × 30 (times). Note: This is the farthest viewing distance estimated from the screen height. Within this distance, the audience can still clearly see the content on the flexible LED display screen. However, it should be noted that this distance is not absolute, because the actual viewing effect will also be affected by many factors such as ambient brightness, screen brightness, contrast, etc.

The ability of the human eye to distinguish the details of an image is called resolution, which can be measured by the resolution angle and represented by θ. Because the actual θ is very small, it is roughly proportional to the distance between two adjacent points that can be distinguished, and inversely proportional to the viewing distance L, that is, θ≈d/L (radians). Under the condition of a certain viewing distance, if the viewing angle of two adjacent pixels is less than the resolution angle, the human eye cannot distinguish; if it is greater than the resolution angle, there will be a granular feeling, affecting the visual effect. Through calculation, the ideal viewing distance formula of the flexible LED display can be obtained: L > (k×d)/θ, where d is the point spacing (unit: meter), θ is the minimum viewing angle that the human eye can distinguish (the common value is 1 minute, that is, 1/60 degrees), and k is a constant, usually 3438 (this is an empirical value based on the visual characteristics of the human eye).

In summary, we can see that the calculation of the visible distance of a flexible LED display is a process that comprehensively considers multiple factors. Therefore, when choosing and installing flexible LED display screens, it is recommended to consult professional LED screen manufacturers such as sunrise to ensure a good viewing experience.