First, look at the LED display screen flatness:
In order to ensure that the LED display screen image will not be distorted, then the outdoor LED display surface smoothness must be maintained within ± 1mm, if not meet this requirement, and the local phenomenon of bumps will lead to outdoor LED display There is a deadline when viewing video. Therefore, it can be said that flatness is to determine the quality of outdoor LED display a major factor.
Second, look at the LED display screen brightness:
Under normal circumstances, the brightness of outdoor LED display should be more than 1500cd / m2 just to ensure that the normal display work, or because the brightness is not enough so that we can not see the playback of the image content. So in order to buy a good display of outdoor LED display depends on the quality of its LED lamp beads and its brightness parameters.
Third, look at the LED display screen white balance:
Red and green these three primary colors ratio is 1: 4.6: 0.16 when the screen will show the most pure white, so if the outdoor LED display manufacturers produced by the display in the proportion of the primary color deviation will lead to a slight Balance deviation, resulting in outdoor LED display display quality is affected, so look at the purchase of white balance is also very important.