Five main factors affecting the quality of LED Screen

The quality of an LED display can be mainly identified from the following aspects:

1. Flatness

The flatness of the surface of the display should be within ±1mm to ensure that the displayed image is not distorted. Local protrusions or recesses will causes a blind spot in the viewing angle of LED display. The quality of flatness is mainly determined by the production technique.

2. Brightness and viewing angles

The brightness of the indoor full-color LED display must be above 800cd/m² and the brightness of the outdoor full-color screen must be above 1500cd/m² to ensure the normal work. Otherwise the displayed image will be invisible because of the low brightness. The brightness is mainly determined by the quality of the LED die.

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

3. White balance

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 there is a slight deviation in the actual ratio, there will be a deviation in the white balance. Generally, paying attention to whether the white is blue or yellow Green phenomenon. The quality of the white balance is mainly determined by the control system of the display, and the die also has an impact on the color reproduction.

4. Color reduction

Color reproduction refers to the reproduction of the color of LED screen, that is, the color displayed must be highly consistent with the color of back source, so as to ensure the realism of the image.

5. Whether there is mosaic or dead spots

Mosaic refers to the small four squares that are always bright or black that appear on the display. It is the phenomenon of module necrosis. The main reason is that the quality of the connectors used in the display is not good enough.

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

6. Whether there are 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 low scanning frequency.