For LED failure. First of all, the application design, the need to select the appropriate circuit, from the circuit interface to reduce the static threat, to prevent the occurrence of large current pulse damage LED work, the need to design a reasonable structure to protect the sealed LED, to prevent the possibility of external force pull LED tube leg phenomenon The
Second, pay attention to the use of the details of the control of the use of LED control: pay attention to the use of materials, reasonable control, for the expired materials must be done moisture-proof process; pay attention to the strict control of anti-static measures, display assembly factory should have good anti- Measures, special anti-static, anti-static floor, anti-static iron, anti-static pad, anti-static ring, anti-static clothing, humidity control, equipment grounding (especially cut foot machine) are the basic requirements, and use static Regular testing; must strictly control the wave front welding temperature and furnace time. Recommended: preheating temperature of 100 ℃ ± 5 ℃, the maximum does not exceed 120 ℃, and the preheating temperature rise requires a smooth, welding temperature of 245 ℃ ± 5 ℃, welding time is not recommended for more than 3 seconds, after the furnace should not vibration or shock LED, until the resumption of room temperature.
The temperature parameters of the wave soldering machine to be regularly tested, which is determined by the characteristics of the LED, overheating or fluctuations in the temperature will directly damage the LED or cause LED quality hazards, especially for small size, such as 3mm round and oval LED; LED display in the absence of LED is not bright, there are often more than 50% probability for all types of Weld caused by, such as LED pin Weld, IC pin Weld, Pai Pai mother Weld and so on. The improvement of these problems requires a rigorous improvement in the process and the strengthening of the quality inspection. The factory before the high temperature and room temperature aging test, vibration test is also a good test method.
LED product failure is the effective control of the packaging, display design, production and display projects need to pay attention to prevention and control of an important part. And the effective protection of these links requires our industry to breed more like Bai lions, national star, Lehman, Li Yade, such as outstanding enterprises, the implementation of more stringent quality management system, from design, procurement, production, quality testing, Packaging, transportation, pre-sale and after-sale tracking the entire process of product quality monitoring to ensure that the product "quality service zero defect" to promote the healthy and orderly growth of the industry.