LED display screenA full color LED display is good or bad can be identified from the following aspects:

1 flatness LED display screen surface flatness to within ± 1mm ??to ensure that the displayed image is not distorted, partial raised or recessed will lead to the display viewing angle of dead ends. The quality of flatness is determined mainly by the production process.

2, brightness and viewing angle indoor full color brightness in 800cd/m2 above, outdoor full color led display brightness to 1500cd/m2 above in order to guarantee the normal work of the screen, otherwise it will not because the brightness is too low clear the displayed image. Size of the brightness of the LED die is good or bad decision.

Directly determine the size of the viewing angle display the number of audience, and therefore the bigger the better. The size of the viewing angle is mainly determined by the die package.

3, the white balance white balance effect is one of the display of the most important indicators. School taken in the proportion of red, green and blue colors will show 1:4.6:0.16 pure white, if the actual proportion of point deviation occurs the white balance bias, and generally pay attention to whether the white bluish, partial yellow-green phenomenon. The white balance is good or bad by the display control system, the die also have an impact on the reduction of color.

Restore the color of the color reduction means the reduction of the display of color, which indicates not only the led display screen color to be highly consistent with the color of the source, so as to ensure realism of the image.

5, with or without mosaic, dead phenomenon mosaic lit or normally black display four boxes, both modules necrosis, mainly due to access plug-ins used for the display quality, but off.

The dead appear on the LED display screen lit or normally black single point, how much of the dead die is good or bad.

6, with or without color color refers to the obvious color difference between adjacent modules, the color of the transition module, cause the color phenomenon mainly by poor control system, the gray level is not high lower scanning frequency caused.