Resolution is an important factor that determines the detail and clarity of an LED display; the more pixels it produces, the clearer it is.
Resolution is often seen and indicated by width and height, like 1920 by 1080. Since a higher resolution means more pixels, in number, each of the pixels can be a small light-emitting diode, so it usually offers finer quality of images.
Put in human perspective, the size of the LED display resolution relies a lot on pixel pitch, which actually is the distance between two center points of pixels. A small pixel pitch means high density of pixels and, as a consequence, high resolution. For example, a 1.25mm pixel pitch display will contain more pixels per square meter than a 4mm pixel pitch display, making it have a much sharper image.
The resolution can vary significantly between applications. The more common are 720p, 1280x720; 1080p, 1920x1080; 4K, 3840x2160; and 8K, 7680x4320. High definition (HD)-the 1080p kind-would be used where sign displays are most likely to be viewed up close by a person, as in a control room or in a retail setting. Ultra-high definition, such as 4K and 8K, would be used in larger displays outside, where a great amount of detail is shown, even at a distance.
Other factors that affect perceived resolution are viewing distance and screen size. For example, on a physically larger screen viewed from a distance, the pixel density could be lower and still appear sharp. Smaller displays or those viewed up close call for higher resolutions in order to maintain the clarity of the image.
The final selection of the right resolution for the LED display lies in the goal that it should reach, thus achieving a balance among the viewing distance, content requirement, and budget.