Surface flatness
According to the normal standard surface roughness to be within the ±1mm, such a goal is to ensure that the display image does not distort, local convex or concave will lead to the visual angle of the display corner.
Color reduction
Color is the most can reflect the quality of the LED display of a standard, the reduction of color, that is, the display screen color to play with the source of the color to maintain a high degree of consistency, so as to ensure that the image of the real sense.
Brightness
Indoor led Full-color display brightness in the 800cd/m2 above, outdoor led Full-color display brightness in the 1500cd/m2 above, in order to ensure the normal display of work, otherwise because the brightness is too low to see the image shown. The size of the brightness mainly by the LED tube core good or bad decision, so the quality of LED chip is very important.
Visual angle
The size of the visual angle directly determines the number of the display audience, so the bigger the better. The size of the visual angle is mainly determined by the encapsulation method of the LED tube core.
Security
LED display is composed of multiple boxes, each box must do outside the ground protection, grounding resistance should be less than 0.1 euro. and can withstand high pressure, 1500v1min does not penetrate. Warning signs and signs are required at high-voltage input and high voltage wiring.
In addition to the above, there is also a very important and necessary aspect is the LED display of power supply, wire, PCB board. Poor power supply can cause the power overload to run, screen fault frequently, even fire.