Why are spacing and pixels the key data for choosing LED outdoor large screen?

We are choosing LED outdoor large screen, with what data to measure and judge its product quality? Choose LED outdoor large screen “point spacing, pixel” is the key data! Now, let’s introduce these two data.
First, the sight distance of LED display,

Where to put the display screen and how far people usually stand to see is only an important factor to determine the distance between points when selecting the LED display screen. Generally, there is a formula: visual distance = distance between points / (0.3 ~ 0.8), which is an approximate range. For example, for a display screen with 16 mm point spacing (p16 LED display screen), the visual distance is 16-54 meters. If the distance between the stations is close, the pixels of the display screen can be distinguished one by one. The sense of particles is relatively strong. If the station is far away, the human eye can not distinguish the detailed features（ We focus on normal vision, not including myopia and hyperopia). In fact, this is also a rough figure. For outdoor LED display, P10 or p12 is generally used for close distance, and p16 or P20 is used for far distance; For indoor displays, p2.5 ~ P5 are generally available, and P6, p7.62 or P10 are used further.
Second, the total number of pixels of LED display.
For video, the basic is VCD format, resolution 352 * 288, DVD format 768 * 576. So for the video screen, we suggest that the resolution should not be lower than 352 * 288, so that the display effect is good enough. If it is lower, it can be displayed, but it can not achieve better effect.
For the display of text and pictures based on single and double primary color LED display, the resolution requirement is not high, according to the actual size, display 9 font problem, can be determined according to your text.
Therefore, the general choice of LED display, the smaller the point spacing, the better, the higher the resolution, the display will be clear. However, we should also consider the cost, demand, application scope and other factors.