1, the surface smoothness of the flat LED display should be less than ± 1mm to ensure that the display image is not distorted, the local projection or concave surface will lead to the dead angle of the display perspective. Smoothness mainly depends on the production process.
2, the brightness of the full-color screen in brightness and viewing angle is above 800cd/m2, and the brightness of the outdoor full-color screen is above 1500cd/m2 to ensure the normal operation of the display, otherwise, the displayed image cannot be seen clearly because the brightness is too low. The size of the brightness mainly depends on the quality of the LED mold. The size of the viewing angle directly determines the audience of the display, so the bigger the better. The size of the viewing angle depends mainly on the way the core is packaged.
3, white balance effect is one of the most important indicators of the display. In color science, when the ratio of red, green and blue is 1 ≤ 4.6 ≤ 0.16, it is pure white. If there is a slight deviation from the actual ratio, white balance deviation will occur. In general, attention should be paid to whether the white is blue or not. Yellow-green phenomenon. White balance is mainly determined by the control system of the display, and the core also affects the color reproducibility.
4, color reproducibility refers to the display of the color can be about, not only the color of the display should be highly consistent with the color of the playback source to ensure the authenticity of the image.
5, if there is a mosaic or no mosaic, dead spot phenomenon is the display screen appears on the small square block, usually bright or usually black, which is mainly because the display uses the quality of the external connection program is not qualified. Dead spot is the appearance of a single point on the LED display, the number of dead spots depends mainly on the quality of the core.
6, the presence or absence of color blocks refers to the obvious color differences between adjacent modules. The color conversion is based on the module. The color block phenomenon is mainly due to poor control system, low grayscale, low scanning frequency and other reasons.
