1. Color recovery: The color recovery refers to the recovery of the display screen to the color, that is, the color displayed on the display screen should be highly different from the color of the playback source, so as to ensure the authenticity of the image.
2. Whether there is mosaic or dead point phenomenon: Mosaic refers to the small squares that are always bright or always black on the display screen, which is the phenomenon of module necrosis.
Dead point refers to a single point that is always bright or always black on the LED display, and the number of dead points is mainly determined by the quality of the die.
3. With or without color block: Color block refers to the obvious color difference between adjacent modules. The color transition is based on the module. The phenomenon of color block is mainly caused by poor control system and low gray level. , the scanning frequency is low.
4. Flatness: In order to ensure that the displayed image is not distorted, the surface flatness of the LED display screen should be within ±1mm
5. Brightness and viewing angle: The brightness of the indoor full-color display should be above 800cd/m2, and the brightness of the outdoor full-color display should be above 1500cd/m2 to ensure the normal operation of the display, otherwise it will be viewed due to too low brightness. The displayed image is not clear.
6. White balance effect: White balance effect is one of the most important indicators of the display screen. In terms of color, when the ratio of the three primary colors of red, green and blue is 1:4.6:0.16, the authentic white will appear. If the theoretical ratio has a slight tendency, it will show a tendency of white balance. Generally, it is necessary to pay attention to whether the white is bluish or not. Yellow-green phenomenon. The quality of the white balance is mainly determined by the control system of the display screen, and the die also has an impact on the recovery of the color.
