How to distinguish LED display
How do we identify the quality of LED display is good or bad, we should from what to detect today we teach you to identify from the following aspects:
How to distinguish LED display
1. Flatness: the display surface roughness of ± 1mm or less, in order to ensure that the display image does not distort, the local bulge or recess will lead to the display of the viewing angle appear dead. The quality of flatness is mainly determined by the production process.
2. Brightness and viewing angle: indoor full-color screen brightness to 800cd / m2 above, outdoor full-color screen brightness in more than 5500cd / m2, in order to ensure the normal operation of the display, or because the brightness is too low and can not see The image displayed. 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 is one of the 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 white balance is mainly determined by the display control system, the die also has an impact on the color reproduction.
4. Color reduction: color reproduction refers to the display of color reproduction, both the color of the display screen and the source color to maintain a high degree of consistency, so as to ensure the authenticity of the image.
5 with or without mosaic, dead phenomenon: Mosaic refers to the display appears often bright or often small black box, both the phenomenon of module necrosis, the main reason for the quality of the display connector used, but off.
Dead point refers to the display appears often bright or often a single black point, the number of dead spots mainly by the quality of the die to decide.
6 with or without color blocks: color block refers to the more obvious color difference between adjacent modules, the color of the transition to the module as a unit, causing the color phenomenon is mainly caused by the control system is poor, the gray level is not high, Low scan frequency.
