Led display in led failure is likely to be what reason?
Application design, first need to choose the appropriate circuit, reduce electrostatic threat from interface circuit, put an end to large current pulse damage the led working condition, the structure of the protective seal led, put an end to led tube the injury may force phenomenon.
Second in the production of the rational use of the details of the led control: pay attention to material feeding, use reasonable control for expired materials must do moistureproof processing;
Pay attention to the strict control of anti-static measures display assembly plant should have a good anti-static measures, special anti-static, anti-static floor, antistatic soldering pen, static radio pad, anti-static, anti-static clothing, humidity control, equipment grounding (
Especially cut foot machine)
Are the basic requirements, and to use static all tested periodically;
Must strictly control the wave crest welding temperature and furnace time.
Recommended for: preheat temperature 100 ℃ + / - 5 ℃, the highest do not exceed 120 ℃, and the requirement of preheating temperature increasing is smooth, the welding temperature is 245 ℃ + 5 ℃, welding time suggest no more than 3 seconds, after furnace vibration or shock led of avoid by all means, until the normal temperature state.
Crest welder regularly test the temperature of the parameters, this is determined by the characteristics of leds, overheat or fluctuations in temperature will directly damage the led or led quality hidden trouble, especially for small sizes such as 3 mm round and oval led;
Full color led display
when the led is not bright, often more than 50% probability for the various types of virtual welding, such as led tube feet virtual welding, IC pin virtual welding, welding and row needle row, etc.
The improvement of these issues need to improve process strictly and strengthen the quality inspection to solve.
Before delivery of the high temperature and room temperature ageing test, vibration test also can yet be regarded as a kind of good test method.
Led products to effectively control the failure problem is encapsulation, display design, production and display project need to pay attention to the important link of the prevention and control.
Effective guarantee and these links, we need to industry produce more excellent enterprise, to implement more strict quality management system, from design, procurement, production, quality inspection, packaging, transportation, pre-sale and after-sale tracking process for product quality monitoring, ensure that the product 'quality zero defect', promote healthy and orderly growth of the industry as a whole.
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