The quality of a full-color display can be judged mainly from the following aspects:
1. Flatness
The surface flatness of the display should be within ±1mm to ensure that the displayed image is not distorted. Local protrusions or depressions will cause blind spots in the viewing angle of the display.
2. Brightness and viewing angle
The brightness of the indoor full-color screen should be above 800cd/m2, and the brightness of the outdoor full-color screen should be above 1500 cd/m2 to ensure the normal operation of the display. Otherwise, the displayed image will not be clear due to the low brightness.
3. White balance effect
The 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 slightly deviated, there will be a deviation in the white balance. Generally, attention should be paid to whether the white is blue or yellow-green.
4. Color restoration
Color restoration refers to the color restoration of the display screen, that is, the color displayed on the display screen must be highly consistent with the color of the playback source, so as to ensure the realism of the image.
5. Whether there is mosaic or dead point phenomenon
Mosaic refers to the small square blocks that are always bright or always black on the display screen, that is, the module necrosis phenomenon, the main reason is that the quality of the connectors used in the display screen is not up to standard.
6. Whether there is color block
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 grayscale level and low scanning frequency.