Tips to prevent quality problems on LED displays

   LED display advertising media also has the advertising characteristics of high effective reach. Compared with TV, newspapers and other media, the price of LED display is relatively low. These unique values make full-color LED advertising screen media a natural choice for outdoor media. Unlike traditional outdoor media, full-color LED display is not just a simple outdoor media. It also has the characteristics and advantages of TV and other media. It has a larger creative space and a wider three-dimensional space for interaction and communication with consumers in time and space. It can meet personalized needs and has the communication 

concept of the digital age. It is a unique screen form.

    When we apply LED display screens, we often encounter such problems. The LED display screen works normally on the product at the beginning, but after lighting for a period of time, there will be dim light, flashing, failure, intermittent lighting, etc., which will cause serious damage to the product. The reasons for this phenomenon are roughly:

1. When applying the product, there are problems with the welding process, such as too high welding temperature, too long welding time, and no anti-static work. 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

1. Do a good job of controlling the welding process.

2. Perform aging test on the product

Aging is an important guarantee for the reliability of electronic products and is an indispensable step in product production. LED displays can improve their performance after aging, and help stabilize the performance of later use. LED display aging test is a very important link in product quality control, but it is often overlooked in many cases and cannot be properly and effectively aged. LED aging test is a countermeasure taken based on the characteristics of the product's failure rate curve, namely the bathtub curve, to improve the reliability of the product, but this method is not necessary. After all, aging test is at the expense of the life of a single LED product.

LED aging methods include constant current aging and constant voltage aging. Constant current source means that the current is constant at any time. There is a problem of frequency, not constant current. That is AC or pulsating current. AC or pulsating current source can be designed to have a constant effective value, but this power supply cannot be called a constant current source. Constant current aging is a characteristic of LED current operation and is a scientific way of LED aging. Overcurrent impact aging is also a new aging method adopted by LED display manufacturers. This type of aging is performed using a constant current source with adjustable frequency and current, in order to judge the quality and life expectancy of the LED in a short period of time, and to pick out many LEDs with hidden dangers that cannot be picked out by conventional aging.