The calculation of the viewing distance for flexible LED displays primarily depends on the pixel pitch, screen height, and the resolution capabilities of the human eye. Here are some commonly used calculation methods:
I. Calculation Based on Pixel Pitch
Minimum Viewing Distance:
Formula: Minimum Viewing Distance = Pixel Pitch (mm) × 1 (or 1000/1000, i.e., converted to meters, but usually calculating in millimeters is sufficient).
Explanation: This is the minimum viewing distance at which the flexible LED display can display a smooth image without producing a grainy effect.
Optimal Viewing Distance:
Formula: Optimal Viewing Distance = (Pixel Pitch (mm) × 1000) to (Pixel Pitch (mm) × 3000) (unit: millimeters).
Or converted to meters: Optimal Viewing Distance = (Pixel Pitch (mm) × 1) to (Pixel Pitch (mm) × 3) (unit: meters).
Explanation: Viewing the screen within this distance range provides a relatively clear image and a comfortable visual experience. This range is derived from a combination of the human eye's resolution capabilities and the pixel density of the flexible LED display.
II. Calculation Based on Screen Height
Maximum Viewing Distance:
Formula: Maximum Viewing Distance = Screen Height (meters) × 30 (times).
Explanation: This is an estimated maximum viewing distance based on the screen height. Within this distance, viewers can still clearly see the content on the flexible LED display. However, it should be noted that this distance is not absolute, as the actual viewing effect is also affected by various factors such as ambient brightness, screen brightness, and contrast.
III. Calculation Based on Human Eye Resolution
The ability of the human eye to resolve image details is called resolution, which can be measured by the resolution angle, denoted by θ. Because the actual θ is very small, it is approximately proportional to the distance between two adjacent resolvable points and inversely proportional to the viewing distance L, i.e., θ ≈ d/L (radians).
At a given viewing distance, if the viewing angle of two adjacent pixels is less than the resolution angle, the human eye cannot distinguish them; if it is greater than the resolution angle, there will be a grainy feeling, affecting the visual effect. Through calculation, the ideal viewing distance formula for flexible LED displays can be obtained: L > (k × d) / θ, where d is the pixel pitch (in meters), θ is the minimum viewing angle that the human eye can resolve (the commonly used value is 1 arc minute, or 1/60 of a degree), and k is a constant, usually taken as 3438 (this is an empirical value based on the visual characteristics of the human eye).
In summary, we can see that calculating the viewing distance of a flexible LED display is a process that takes into account multiple factors.
Calculation Methods for the Viewing Distance of Flexible LED Displays
The calculation of the viewing distance for flexible LED displays primarily depends on the pixel pitch, screen height, and the resolution capabilities of the human eye. Here are some commonly used calculation methods:
I. Calculation Based on Pixel Pitch
Minimum Viewing Distance:
Formula: Minimum Viewing Distance = Pixel Pitch (mm) × 1 (or 1000/1000, i.e., converted to meters, but usually calculating in millimeters is sufficient).
Explanation: This is the minimum viewing distance at which the flexible LED display can display a smooth image without producing a grainy effect.
Optimal Viewing Distance:
Formula: Optimal Viewing Distance = (Pixel Pitch (mm) × 1000) to (Pixel Pitch (mm) × 3000) (unit: millimeters).
Or converted to meters: Optimal Viewing Distance = (Pixel Pitch (mm) × 1) to (Pixel Pitch (mm) × 3) (unit: meters).
Explanation: Viewing the screen within this distance range provides a relatively clear image and a comfortable visual experience. This range is derived from a combination of the human eye's resolution capabilities and the pixel density of the flexible LED display.
II. Calculation Based on Screen Height
Maximum Viewing Distance:
Formula: Maximum Viewing Distance = Screen Height (meters) × 30 (times).
Explanation: This is an estimated maximum viewing distance based on the screen height. Within this distance, viewers can still clearly see the content on the flexible LED display. However, it should be noted that this distance is not absolute, as the actual viewing effect is also affected by various factors such as ambient brightness, screen brightness, and contrast.
III. Calculation Based on Human Eye Resolution
The ability of the human eye to resolve image details is called resolution, which can be measured by the resolution angle, denoted by θ. Because the actual θ is very small, it is approximately proportional to the distance between two adjacent resolvable points and inversely proportional to the viewing distance L, i.e., θ ≈ d/L (radians).
At a given viewing distance, if the viewing angle of two adjacent pixels is less than the resolution angle, the human eye cannot distinguish them; if it is greater than the resolution angle, there will be a grainy feeling, affecting the visual effect. Through calculation, the ideal viewing distance formula for flexible LED displays can be obtained: L > (k × d) / θ, where d is the pixel pitch (in meters), θ is the minimum viewing angle that the human eye can resolve (the commonly used value is 1 arc minute, or 1/60 of a degree), and k is a constant, usually taken as 3438 (this is an empirical value based on the visual characteristics of the human eye).
In summary, we can see that calculating the viewing distance of a flexible LED display is a process that takes into account multiple factors.
