With everyone's enthusiastic investment, more led display problems have different opinions. When the LED is soldered to the product, it works normally at the beginning, but after a period of time, there will be dark light, flickering, failure, intermittent lighting and other phenomena, which will cause serious damage to the product. In the previous section, we talked about the simple process of making LED billboards, and this chapter is about how to prevent the aging of led display products, for your reference. Aging is an important guarantee for the reliability of electronic products, and it is the last essential step in product production. LED products can improve performance after aging, and help to stabilize the performance of later use. LED aging test is a very important link in product quality control, but it is often overlooked in many cases, and it is impossible to perform correct and effective aging. The LED aging test is a countermeasure based on the characteristics of the product failure rate curve, that is, the bathtub curve, in order to improve the reliability of the product, but this method is not necessary, after all, the aging test is to sacrifice the life of a single LED product for the price. LED aging methods include constant current aging and constant voltage aging. A constant current source means that the current is constant at any time. If there is a frequency problem, it is not a constant current. That is alternating or pulsating current. An AC or pulsating current source can be designed so that the effective value is constant, but this kind of power supply cannot be called a "constant current source". Constant current aging is the most scientific LED aging method in line with the working characteristics of hd led display panel current; over-current impact aging is also the latest aging method adopted by manufacturers, and this type of aging is carried out by using a constant current source with adjustable frequency and current. , in order to judge the quality and expected life of LEDs in a short time, and can pick out many hidden dangers of LEDs that cannot be picked out by conventional aging.