1. Flatness the surface flatness of LED display screen should be within 1mm to ensure that the display image does not distort, and local convex or concave will lead to dead Angle of the display screen. The flatness is mainly determined by the production process.
2. Brightness and viewing Angle: the indoor full color screen should be at least 800cd/m2, and the outdoor full color screen should be at least 1500cd/m2, so as to ensure the normal operation of the display screen; otherwise, it will be too low to see clearly the displayed image. Brightness is mainly determined by the quality of LED core.
The size of the viewing Angle directly determines the size of the screen audience, so bigger is better. The size of the viewing Angle is mainly determined by the encapsulation of the core.
White balance effect white balance effect is one of the most important indicators of a display screen. In terms of chromatics, only when the proportion of the three primary colors of red, green and blue is 1:4:6:0.16, will pure white appear. If the actual proportion is a little bit different, the deviation of white balance will appear. In general, we should pay attention to whether the white is blue or yellowish green. The quality of the white balance is mainly determined by the control system of the display screen.