One years when this period of time for outdoor LED screen challenges the largest, humid and high-temperature weather let led screen moisture and heat this to the natural contradictions head-on confrontation. How to do a good job in rainy weather, at the same time in the high-temperature environment to keep the heat well, become the outdoor LED screen difficult problems.
Moisture and heat, a pair of natural contradictions
LED display internal devices belong to MSD components (humidity sensitive devices), once there is moisture into the lamp bead, PCB board, power supply, power line, such as 0 devices oxidation corrosion, and then produce a dead light failure. Therefore, the LED screen module, internal structure and external chassis need to do a comprehensive and rigorous moisture, waterproof design.
At the same time, LED screen internal devices are also the most calorific electronic components, such as LED lamp beads, drive IC, switching power supply. Poor thermal design will cause the screen material to oxidize, affecting the quality and longevity. If the heat gathers and does not disperse, will cause the LED internal device overheating to damage, causing failure. Therefore, the good heat dissipation requirements of permeability, convection structure, which is inconsistent with the requirements of moisture.
First, reducing power consumption and reducing heat loss are the effective ways to improve the heat dissipation ability. Take Shanghai as a representative of the well-known led enterprises, from the source selection of high-quality LED chip optimization design, pay attention to efficient, high-quality driving power of independent development, outstanding raw material quality and excellent performance parameters for heat dissipation, moisture laid a firm foundation.
Furthermore, the improvement of module production process is also the most important. It is understood that Shanghai think twice on the PCB board electronic components of structural optimization, the simplification of the simple, reasonable arrangement, and the use of conductivity coefficient of material potting sealing, at the same time to meet the water vapor seamless and components of the heat demand.
Finally, the rational optimization of box structure can play a key role. In the chassis material to consider the heat dissipation and antioxidant selection of high-quality aluminum, the chassis internal use of multi-layer space structure, the formation of a comprehensive convection of the heat dissipation structure, will be able to make full use of natural air convection cooling, both the heat dissipation and sealing, but also improve the reliability and service life.