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LED display life is affected by four factors

LED display screens are increasingly used for outdoor advertising. Some display screens, however, will suffer from problems such as blurred screens and color distortion after half a year or a year. Without timely action, it can cause a chain reaction and cause more problems. LED display life is affected by four factors, according to Sostron.

LED display service life is affected by four factors

1.Performance of LEDs

In a display screen, the LED light emitting devices are the most critical and life-critical components. We pay attention to LED attenuation characteristics, water vapor permeability characteristics, and UV resistance.

LEDs are characterized by light attenuation. For a display screen with a design life of 5 years, if the brightness attenuation of the LED used is 50% in 5 years, then the attenuation margin should be considered in the design, otherwise the display performance cannot meet the standard after 5 years; attenuation index stability is also important. The life of this screen will be prematurely ended if the attenuation exceeds 50% in 3 years.

Outdoor display screens are eroded by moisture in the air. In the presence of water vapor, LED light-emitting chips will undergo stress changes or electrochemical reactions that will lead to the failure of the device. It is normal for LED light-emitting chips to be enclosed in epoxy resin, which does not corrode. Whenever a LED device has design or manufacturing defects, water vapor can easily enter the device through the pin gap or the gap between the epoxy resin and the shell interface, resulting in rapid failure.

UV light will change the properties of LED colloid and support material, resulting in cracking and shortened LED life. UV resistance of LEDs used outdoors is also an important indicator.

Process and market inspection are necessary for LED device performance improvement. SMD outdoor waterproofing is not guaranteed by Japan and some Taiwan-funded enterprises at present. There are, however, some domestic manufacturers who are eager to launch new products, and blindly promise excellent outdoor performance without passing the test. In the application of the SMD5050 for outdoor use, many manufacturers have experienced quality problems, some of which have lost tens of millions of yuan.

2.Parts that are external

A display screen also uses many other peripheral components, such as circuit boards, plastic shells, switching power supplies, connectors, chassis, etc. If any component fails, the display screen’s life may be reduced. Therefore, it is no exaggeration to state that the longest life of the display screen is determined by the life of the component with the shortest lifespan. As an example, LEDs, switching power supplies, and metal shells are selected according to the 8-year standard, but the circuit board’s protective process can only support its work for two years. Corrosion will damage it after 2 years, so we can only get a 2-year display.

 - LED display life is affected by four factors

3.Product anti-fatigue performance

Display products’ anti-fatigue performance is determined by their production process. Poor three-proofing treatment makes it difficult to guarantee anti-fatigue performance of the module. Temperature and humidity changes will cause the circuit board’s protective surface to crack, resulting in a loss of protection.
A display screen’s life is also determined by the production process. Processes involved in the production of display screens include storage and pretreatment of components, furnace welding, three-prevention treatment, and waterproof sealing. Selection and proportion of materials, parameter control, and operator skill determine the effectiveness of the process. A factory with many years of experience will be able to control the production process more efficiently.

4.The working environment

Depending on the purpose of the display screen, the working conditions vary greatly. The indoor temperature difference is small, and there is no rain, snow or ultraviolet influence; the outdoor temperature difference can reach 70 degrees, plus wind, sun, and rain. A poor working environment will accelerate the aging of the display screen, and the working environment affects the display screen’s life.

Electronic products such as LED displays are relatively expensive. On weekdays, if it is not carefully maintained, its service life will be greatly reduced, and various problems will occur, which not only impacts its use, but also costs a lot of money. On weekdays, the editor reminds everyone to pay attention to LED display screen maintenance.

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