LED display advertising media also has the advertising characteristics of high effective reach rate. Compared with media placement forms such as television and newspapers, LED display screens are relatively low-priced. These unique values make full-color LED advertising screen media a natural upstart in outdoor media. Different from traditional outdoor media, the full-color LED display is not just an outdoor media. It also has the characteristics and advantages of television and other media. It has a larger creative space and a broader three-dimensional space for interacting and communicating with consumers in time and space. It can It is a unique screen form that meets personalized needs and has a communication concept in the digital age.
We often encounter such problems when applying LED displays. The LED display screen works normally at the beginning of the product, but after being lit for a period of time, dark light, flickering, malfunctions, and intermittent lighting will appear. , causing serious damage to the product. The reasons causing this phenomenon are roughly:
1. When applying the product, there are problems with the welding process, such as the welding temperature is too high, the welding time is too long, anti-static work is not done well, etc. More than 95% of these problems are caused by the packaging process.
2. It is caused by the quality of the LED itself or the production process.
Prevention methods
1. Control the welding process well.
2. Conduct aging test on the product
Aging is an important guarantee for the reliability of electronic products and is the last indispensable step in product production. LED products can improve their performance after aging and help stabilize their performance in later use. LED display aging test is a very important link in product quality control, but it is often ignored in many cases and cannot perform correct and effective aging. The LED aging test is a countermeasure taken based on the characteristics of the product's failure rate curve, that is, the bathtub curve, in order to improve the reliability of the product. However, this method is not necessary. After all, the aging test sacrifices 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. There is a frequency problem, not constant current. That's AC or pulsating current. AC or pulsating current sources can be designed to have a constant effective value, but this power supply cannot be called a constant current source. Constant current aging is the working characteristic of LED current and is a scientific way of aging LED. Overcurrent impact aging is also a new aging method adopted by LED display manufacturers. This type of aging is carried out by using a constant current source with adjustable frequency and adjustable current. , in order to judge the quality and life expectancy of LEDs in a short time, and to pick out many hidden dangers of LEDs that cannot be picked out by conventional aging.
