How to prevent LED screen from aging
LED screen advertising media has the characteristics of high effective arrival rate at the same time. Compared with TV, newspapers and other media delivery forms, the price of LED 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, outdoor LED screen is not only a simple outdoor media, but also combines the characteristics and advantages of TV and other media. It has a larger creative space and a broader three-dimensional space for space-time interaction and communication with consumers. It can meet personalized needs, has the communication concept of the digital era, and is a unique screen form.
When we apply LED screens, we often have such problems. LED screens work normally at the beginning of the product, but after being lit for a period of time, there will be dark light, flicker, failure, intermittent lighting and other phenomena, which will cause serious damage to the product.
The causes of this phenomenon are as follows:
- When applying the product, there are problems in the welding process, such as too high welding temperature, too long welding time, and failure to do a good job in anti-static work. More than 95% of these problems are caused by the packaging process.
- Led quality or production process.
- Control the welding process.
- Conduct aging test on products
Aging is an important guarantee for the reliability of electronic products and the last essential step in product production. LED products can improve efficiency after aging, and help to stabilize efficiency in later use. Aging test of LED screen screen is a very important link in product quality control, but it is often ignored in many cases, and it is impossible to carry out correct and effective aging. Led aging test is a countermeasure taken according to the characteristics of the failure rate curve of the product, that is, the bathtub curve, so as to improve the reliability of the product. However, 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 frequency problem, not a constant current. That is alternating current or pulsating current. The AC or pulsating current source can be designed to have a constant effective value, but this power source cannot be called a constant current source. Constant current aging is the working characteristic of LED current and a scientific led aging method; Over current impact aging is also a new aging method adopted by LED screen manufacturers. By using a constant current source with adjustable frequency and current, such aging can be carried out in order to judge the quality and expected life of LED in a short time, and can pick out many hidden LED that cannot be picked out by conventional aging.
OBVIOUS is one of the leading Manufacturer of outdoor LED screen, LED signage, LED poster, LED floor tiles in China. Whether indoor led screen, outdoor led screen or dance floor led screen, transparent led screen, poster led screen, curved led screen, all have high cost performance, quality and service is our advantage.OBVIOUS is also a high-tech enterprise integrating R & D, manufacturing and sales.certificates are complete.
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