Reasons for LED Failure in Full Color LED Display

For LED failure issues. First of all, we should choose the proper circuit from the design, reduce the static threat from the circuit interface, and prevent the high current pulse from damaging the working state of the LED. It is necessary to design a reasonable structure to protect the sealed LED and prevent the external force from pulling the LED tube pin.

Secondly, pay attention to the details of the reasonable use of LED in production: pay attention to the reasonable control of material feeding, anti-moisture treatment for expired materials; pay attention to the strict control of anti-static measures, LED display assembly factory should have good anti-static measures, special anti-static ground, anti-static floor, anti-static soldering iron, anti-static mat, anti-static ring, anti-static clothing, humidity control, equipment grounding (especially cutting machine) are basic requirements, and use static electricity regular inspection. The temperature of the wave furnace and the furnace time must be strictly controlled. The recommended temperature is: preheating temperature 100 °C ± 5 °C, maximum not exceeding 120 °C, and the preheating temperature rise is required to be stable, the welding temperature is 245 °C ± 5 °C, the welding time is recommended not to exceed 3 seconds, avoid vibration or impact after the LED through furnace until it returns to normal temperature.

The temperature parameters of the wave furnace should be checked regularly, which is determined by the characteristics of the LED. Overheating or fluctuating temperature will directly damage the LED or cause LED quality hazard, especially for small and thin LEDs, such as 3mm round and oval LED. Full color LED display When the LED does not light up, there are often more than 50% probability of various types of solder joints, such as LED pin cold solder joint, IC pin cold solder joint, pin header cold solder joint, etc. Improvements in these problems require rigorous improvements in the process and enhanced quality inspections. High temperature and normal temperature aging test and vibration test before leaving the factory are also a good test method.

The effective control of LED product failure is an important part of packaging, LED display design, production and LED display engineering that requires attention to preventive control. The effective protection of these steps will lead to more excellent enterprises born in our industry, and implements a stricter quality management system. The quality of products is designed from the aspects of design, procurement, production, quality inspection, packaging, transportation, pre-sales and after-sales tracking. Monitoring to ensure that the product "zero defects in quality service" promotes healthy and orderly growth of the entire industry.

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