How to distinguish between good and bad full-color LED display screen?

　　1. Brightness comparison

　　Fix the acrylic board on the same number of modules and increase the distance little by little. In the process, we can see whether the brightness of the lamp beads meets the requirements. Naturally, it is more direct to put the module directly in the text. The higher the brightness, the higher the requirements for lamp beads and the higher the cost. A clean indoor environment can use a low-brightness environment, but if it is a full-color LED display or LED glass curtain wall screen, it must be a high-brightness full-color LED display.

　　2. Whether the brightness of the lamp beads is uniform.

　　While observing the brightness, pay attention to whether the light of the lamp beads is uniform, and pay attention to whether there is chromatic aberration when observing the white light (this is very important). Covering on thin white paper may not be visible, so use a certain thickness of acrylic. No color difference is the most important part of the quality difference, and it is also one of the main reasons for the price difference of the full-color LED display.

　　3. Wire identification

　　The high-quality wire has passed the UL certification, and the instructions of the unqualified LED clearing board manufacturer are not reliable, so the most direct way is to remove the outer shell and count the number of inner cores. Line modules with fifteen, seventeen, and nineteen cores, or even more than twenty or thirty cores, should not be inferior to those with fourteen or eleven cores. on the contrary.

　　4. Lamp bead temperature

　　After lighting for a while, touch the LED lamp bead with your hand, the temperature is high, and the burned person must be low in temperature and unstable.

　　5. Solder joint quality.

　　It is proved that full nugget is good for welding process, and high brightness is good for welding. Temporary installation is serious, poor contact is likely to occur, and later maintenance is troublesome.

　　6. The production method of full-color LED display.

　　At present, there are two methods for making full-color LED displays: front light and side light. The side light transmittance is very high, and the positive light lamp beads use the previous LED display lamp beads, and the quality is stable after market inspection.

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