1: Whether there is mosaic or dead spots: mosaic refers to the effect of uneven color of the unit module on the display. The small four squares that are always bright or black are the phenomenon of necrosis of the module. The main reason is the phenomenon of module necrosis. The quality of the connectors used is not good enough. Dead point refers to a single point that is always bright or black that appears on the display. The number of dead points is mainly determined by the quality of the die.
2: With or without color block Color difference: Color block refers to the obvious color difference between adjacent modules, the color transition is based on the module, and the color block phenomenon is mainly caused by the poor control system and low gray level , Caused by the lower scanning frequency.