The Standard of LED Screen Quality

The standard of LED screen quality
The acceptance of the led screen generally starts from 6 aspects, color reproducibility, color block chromatic aberration, mosaic phenomenon, brightness and viewing angle, and white balance effect.
1. 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 color block phenomenon is mainly caused by the poor control system, low gray level, and scanning. due to lower frequency.
2. The reducibility of color The reducibility of color refers to the reducibility of the LED screen to the color, that is, the color displayed on the screen must be highly consistent with the color of the playback source, so as to ensure the authenticity of the image.
3. Flatness The surface flatness of the LED screen should be within ±1mm to ensure that the displayed image will not be distorted. Partial bulges or recesses will lead to a dead angle in the viewing angle of the screen. The quality of flatness is mainly determined by the production process.
4. Whether there is mosaic or dead point Mosaic refers to the small squares that are always bright or always black on the screen, which is the phenomenon of module necrosis. The main reason is that the quality of the connectors used on the screen is not good enough. Dead point refers to a single point that is always bright or always black on the LED screen, and the number of dead points is mainly determined by the quality of the die.
5. White balance effect White balance effect is one of the most important indicators of the screen. In terms of color, pure white will be displayed only when the ratio of red, green and blue primary colors is 1:4.6:0.16. If the actual ratio is a little bit deviated, there will be a deviation of white balance. Generally, we should pay attention to whether the white is bluish or yellowish. green phenomenon. The quality of the white balance is mainly determined by the control system of the screen, and the die also has an impact on the reproducibility of the color.
6. 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 1500cd/m2 to ensure the normal operation of the screen, otherwise the display will be unclear because the brightness is too low Image. The size of the brightness is mainly determined by the quality of the LED die. The size of the viewing angle directly determines the size of the screen audience, so the bigger the better. The size of the viewing angle is mainly determined by the packaging method of the die.