Technology | Efficient application LED display cleverly “anti-aging”

684 views admin 2020-07-27

LED advertising screen media also has the advertising characteristics of high effective reach rate. Compared with media placement forms such as TV and newspapers, the price of LED display screens is relatively low. These unique values make the full-color LED advertising screen media naturally become the upstart of outdoor media. Different from traditional outdoor media, the full-color LED advertising screen is not just a pure outdoor media. It also has the characteristics and advantages of TV and other media. It has a larger creative space and a broader three-dimensional space for interaction and communication with consumers. It is a unique screen form that meets individual needs and has the concept of communication in the digital age. LED aging methods

We often encounter such problems when using LEDs. The LED display screen works normally at the beginning of the product, but after a period of time, there will be dim light, flickering, malfunction, intermittent lighting, etc. The product caused serious damage. The reasons for this phenomenon are roughly as follows:

1. When applying the product, there are problems in the welding process, such as high welding temperature and long welding time, failure to do anti-static work, etc. More than 95% of these problems are caused by the packaging process.
2. The quality of the LED itself or the production process.

Prevention methods are: 1. Do a good job of controlling the welding process. 2. Carry out aging test on the product.

Aging is an important guarantee for the reliability of electronic products, and is the last essential step in product production. LED products can improve performance after aging and contribute to stable performance in later use. LED advertising screen aging test is a very important link in product quality control, but it is often overlooked and cannot be properly and effectively aging. The LED aging test is a countermeasure taken according to the characteristics of the product’s failure rate curve, that is, the bathtub curve, to improve the reliability of the product, but this method is not necessary. After all, the aging test sacrifices the life of a single LED product. At the cost.

LED aging methods include constant current aging and constant voltage aging. 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 current or pulsating current. AC or pulsating current source can be designed to have a constant effective value, but this kind of power source cannot be called a constant current source. Constant current aging is the most scientific LED aging method in line with the characteristics of LED current. Overcurrent impact aging is also the latest aging method adopted by LED display manufacturers. It is performed by using a constant current source with adjustable frequency and adjustable current. This kind of aging is expected to judge the quality and life expectancy of the LED in a short time, and can pick out many hidden LEDs that cannot be singled out by conventional aging.