1, flatness LED display surface smoothness within ± 1mm, in order to ensure that the display image does not distort, the local raised or recessed will lead to the display of the viewing angle appears dead. The quality of flatness is mainly determined by the production process.
2, brightness and viewing angle Indoor full color brightness to 800cd / m2 above, outdoor full color screen brightness above 1500cd / m2, in order to ensure the normal operation of the display, or because of the brightness is too low and can not see clearly Displayed 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 number of display audience, so the bigger the better. The size of the viewing angle is mainly determined by the die package.
3, white balance effect White balance effect is one of the most important indicators of the display. Color science and technology when the ratio of red, green and blue primary colors is 1: 4.6: 0.16 will show a pure white, if the actual proportion of a little deviation will appear white balance deviation, the general should pay attention to whether the white blue, yellowish Green phenomenon. The quality of the white balance is mainly determined by the control system of the display screen. The die also has an effect on the color reproducibility.