LED display advertising media also has the characteristics of high effective arrival rate. Compared with media placement forms such as TV and newspaper, the price of LED display screen 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, full-color LED display is not only pure outdoor media. It also has the characteristics and advantages of television and other media. It has greater creative space and broad space for interaction and communication with consumers. It is a unique form of screen, which can meet personal needs, and has the communication concept of the digital age.
We often encounter such problems when using LED display. The LED display screen can work normally at the beginning of the product, but after a period of time, there will be dim lights, flickers, faults, intermittent lighting, etc., which will seriously damage the product. According to the introduction of Shenzhen LED display manufacturer Dayuan intelligent, the reasons for this phenomenon are as follows:1. When using LED display screen, the welding process has the problems of high welding temperature, long welding time and inability to prevent static electricity. More than 95% of these problems are caused by the packaging process.2. There is a problem with the quality of the LED display itself or the production process.
Preventive methods1. Control the welding process.2. Conduct aging test on the product.
Aging is not only an important guarantee to ensure the reliability of electronic products, but also an essential step in product production. LED products can improve the performance after aging and help to maintain stable performance in future use. The aging test of LED display is a very important link in product quality control, but it is often ignored and can not be aged correctly and effectively. Led aging test is a countermeasure taken according to the characteristics of product failure rate curve to improve product reliability, but this method is not necessary. After all, aging testing sacrifices the life of a single LED product. pay the price.
Led aging methods include constant current aging and constant voltage aging. A constant current source means that the current is constant at all times. There is a frequency problem, not a constant current. That is, AC or pulsating current. An AC or pulsating current source can be designed to have a constant RMS, but this power source cannot be called a constant current source. Constant current aging is not only the feature of LED current operation, but also a scientific led aging method. Overcurrent impact aging is also a new aging method adopted by Shenzhen LED display manufacturers. This aging is carried out by using a constant current source with adjustable frequency and adjustable current, so as to judge the quality and expected life of LED in a short time, and identify many hidden dangers that cannot be found by traditional aging.