Outdoor LED display should be equipped with ventilation and cooling device to keep the internal temperature of the screen between -10℃~40℃. The axial flow fan on the back of the screen discharges heat; the outdoor LED display itself generates a certain amount of heat when it is working. If the ambient temperature is too high and the heat dissipation is poor, the integrated circuit may not work properly or even be burned, making the LED display system unable to normal work.
The electronic components for lightning protection and grounding on outdoor LED displays are highly integrated, and the requirements for susceptibility to countermeasure interference are getting higher and higher. Lightning strikes can harm the exposure system in many ways. Under normal circumstances, it can directly hit the screen and then leak to the ground through the grounding device. Overcurrent during lightning strikes causes mechanical, electrical, and thermal damage. The solution is equipotential connection, that is, the metal shell without grounding or poor grounding, the metal shell of the cable, the metal frame in the display and the grounding device are firmly welded to prevent objects from entering due to the induction of high voltage or the lightning strike of the grounding device The high potential transmission caused by the ground causes the internal insulation of the equipment and the overvoltage of the cable core to strike back. Outdoor LED display screens are also subject to strong electric and strong magnetic attacks caused by lightning strikes. In order to enable the large currents caused by lightning strikes to be discharged in time, reduce the overvoltage appearing on the equipment and limit the intrusion waves generated by lightning strikes. Generally, lightning protection devices should be installed on displays and buildings.
