LED display repair identification method
The quality of LED full-color display can be mainly signed from the following aspects:
1.Flatness.
The flatness of the surface of the LED display should be within ±1mm to ensure that the displayed image is not distorted, and the local raised or recessed portion may cause a blind angle in the viewing angle of the display. The flatness is mainly determined by the production process.
2. Brightness and viewing angle.
The brightness of indoor full-color screen should be above 800cd/m2, and the brightness of outdoor full-color screen should be above 1500cd/m2 to ensure the normal operation of the display screen. Otherwise, the displayed image will not be seen because the brightness is too low. The brightness is mainly determined by the quality of the LED lamp beads.
The size of the viewing angle directly determines the number of LED display audiences, so the bigger the better. The size of the viewing angle is mainly determined by the packaging method of the die.
3. White balance effect.
White balance effect is one of the most important indicators of LED display. In color science, when the ratio of the three primary colors of red, green, and blue is 1:4.6:0.16, pure white is displayed. If the actual ratio is slightly deviated, there will be a white balance deviation. Generally, it should be noted whether the white color is bluish or yellowish. Green phenomenon. The quality of the white balance is mainly determined by the control system of the LED display, and the lamp beads also have influence on the reproducibility of the color.
