How to Distinguish a LED Screen Quality
The quality of a full-color LED display can be mainly distinguished from the following aspects:
The flatness of the surface of a LED display should be within ±1mm to ensure that the display image does not distort, and the local bulge or indentation can 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
Indoor LED full-color screen brightness to 800cd//m2 above, outdoor LED full-color screen brightness to 1500 cd//m2 or more, in order to ensure the normal operation of the LED display, otherwise, it will be too low to see the brightness is not clear Image. The brightness is mainly determined by the quality of the LED die.
The size of the viewing angle directly determines the number of 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 a 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 slightly deviates, 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 white balance is mainly determined by the control system of the LED display. The die also influences the reducibility of color.
4. Reducibility of color
The reduction of color refers to the reduction of the color of the LED display screen, and the color of the display screen of the LED display must be highly consistent with the color of the playback source, so as to ensure the realism of the image.
5. Is there a mosaic or dead point phenomenon?
Mosaic refers to the light or dark four squares appearing on the LED display screen. It is not only the quality of the connectors used in the LED display but the quality of the connectors.
The dead point refers to the single point of the light or darkness that appears on the LED display. The number of dead spots is mainly determined by the quality of the die.
6. There is no color block
The color patches refer to the obvious color difference between adjacent modules. The color transition is based on the module. The color patching phenomenon is mainly caused by the poor control system, low gray level, and low scanning frequency.