How to distinguish the quality of the LED screen?

1、Flatness

The flatness of the surface of the LED display screen should be within ± 1mm ​​to ensure that the displayed image is not distorted. Local protrusions or recesses will cause the viewing angle of the display screen to appear dead. The flatness is mainly determined by the production process.

2、Brightness and viewing angle

The brightness of the indoor full-color screen must be above 800cd / m2, and the brightness of the outdoor full-color screen must be above 1500cd / m2 in order to ensure the normal operation of the display, otherwise the displayed image will not be seen clearly because the brightness is too low. The brightness is mainly determined by the quality of the LED die.

The size of the viewing angle directly determines the number of display audiences, so the larger the better. The size of the viewing angle is mainly determined by the packaging method of the die.

3、The white balance effect

White balance effect is one of the most important indicators of the display. In color science, pure white will be displayed when the ratio of the three primary colors of red, green, and blue is 1: 4.6: 0.16. If the actual ratio is a little off, the white balance will be off. Generally, pay attention to whether the white is bluish and yellow. Green phenomenon. The quality of the white balance is mainly determined by the control system of the display screen. The die also affects the reducibility of the color.

4、The reduction of color

The reducibility of color refers to the reducibility of the display screen to the color. The color displayed on the display screen must be highly consistent with the color of the playback source, so as to ensure the authenticity of the image.

5、 Is there any mosaic or dead point phenomenon?

Mosaic refers to the small four squares that are always bright or black on the display. It is a module necrosis phenomenon. The main reason is that the quality of the plug-in program used by the display is not good.

Dead point refers to a single spot that is always bright or black on the LED display. The number of dead points is mainly determined by the quality of the die.

6、With or without color blocks

Color block refers to the obvious color difference between adjacent modules. The color transition is based on the module. The color block phenomenon is mainly caused by poor control system, low gray level and low scanning frequency. .