4 factors affecting the life of LED display
4 factors affecting the life of LED display
Nowadays, more and more companies use LED display screen for outdoor advertising, However, after half a year or a year, some display screens will have problems such as blurred screen and color distortion, If not handled in time, it will cause chain reaction and lead to more problems. Summarizes 4 factors affecting the life of LED display and Ways to maintain the LED screen.
4 factors affecting the life of LED display
1. LED performance:
LED light emitting devices are the most critical and life-related components of the display screen, For LED, we pay attention to the following indicators: attenuation characteristics, water vapor permeability characteristics, and UV resistance.
Luminance attenuation is an inherent characteristic of LED. For a display screen with a design life of 5 years, if the brightness attenuation of the LED used is 50% in 5 years, the attenuation margin should be considered in the design, and otherwise the display performance cannot meet the standard after 5 years; The stability of the attenuation index is also very important.
If the attenuation has exceeded 50% in 3 years, it means that the life of this screen will end ahead of time. The display screen used outdoors is often eroded by moisture in the air. The LED light-emitting chip will cause stress change or electrochemical reaction to cause device failure when it is exposed to water vapor.
Under normal circumstances, LED light-emitting chips are wrapped by epoxy resin and are not corroded, Some LED devices with design defects or material and process defects have poor sealing performance, and water vapor easily enters the device through the pin gap or the gap between the epoxy resin and the shell interface, resulting in rapid device failure, which is called “dead light” in the industry.
Under the irradiation of ultraviolet light, the properties of LED colloid and support material will change, which will lead to device cracking and affect the life of LED, Therefore, the ultraviolet resistance of LED used outdoors is also one of the important indicators.
The performance improvement of LED devices needs process and market inspection. At present, Japan and some Taiwan-funded enterprises are very cautious and do not promise SMD outdoor waterproofing.
However, some domestic manufacturers are eager to launch new products to occupy the market, and blindly promise excellent outdoor performance without passing the evaluation, In the application of the SMD5050 for outdoor use, many manufacturers have had a lot of quality accidents, some of which have lost tens of millions of yuan, which is shocking.
2. External parts:
Led display screen module – 4 factors affecting the life of LED display
One of 4 factors affecting the life of LED display, In addition to LED light emitting devices, the display screen also uses many other peripheral components, including circuit boards, plastic shells, switching power supplies, connectors, chassis, and so on, The life of the display screen may be reduced if any component fails.
Therefore, it is no exaggeration to say that the longest life of the display screen is determined by the life of the key component with the shortest life.
For example, LED, switching power supply and metal shell are selected according to the 8-year standard, while the protective process performance of the circuit board can only support its work for 2 years, After 2 years, it will be damaged due to corrosion, so we can only get a 2-year display.
3. Performance of products:
One of 4 factors affecting the life of LED display, The anti-fatigue performance of display products depends on the production process. It is difficult to guarantee the anti-fatigue performance of the module made by the poor three-proofing treatment process.
When the temperature and humidity change, the protective surface of the circuit board will crack, leading to the decline of the protective performance, Therefore, the production process is also the key factor to determine the life of the display screen.
The production processes involved in the production of display screen include: storage and pretreatment of components, furnace welding process, three-prevention treatment process, waterproof sealing process, etc.
The effectiveness of the process is related to the selection and proportion of materials, parameter control and operator quality, The accumulation of experience is very important, so a factory with many years of experience will be more effective in controlling the production process.
4. Working environment:
Due to different purposes, the working conditions of the display screen vary greatly, In terms of environment, the indoor temperature difference is small, and there is no rain, snow and ultraviolet influence; The outdoor temperature difference can reach up to 70 degrees, plus wind, sun and rain.
Bad environment will aggravate the aging of the display screen, and the working environment is an important factor affecting the life of the display screen.
LED display screen is a relatively expensive electronic product. If it is not carefully maintained on weekdays, its service life will be greatly reduced, and various problems will often occur, which not only affects the use, but also costs a lot of money, So the editor reminds everyone to pay attention to the maintenance and maintenance of LED display screen on weekdays.
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Ways to maintain the LED screen
1-Keep the humidity of the environment where the LED display is used, and do not let anything with the nature of moisture enter your LED display, Power on the display screen containing humidity will lead to corrosion of full-color display screen components, thus causing permanent damage.
2- To avoid touching the LED display screen, we can choose passive protection and active protection, try to keep the objects that may cause damage to the full-color display screen away from the screen, and wipe the screen as gently as possible to minimize the possibility of injury when cleaning the screen.
3- The LED display screen has the closest relationship with our users, so it is necessary to do a good job of cleaning and maintenance, It is easy to show dirt when exposed to wind, sun and dust for a long time in the outdoor environment, After a period of time, the screen must be full of dust, which needs to be cleaned in time to wrap the surface with dustproof soil for a long time to affect the viewing effect.
4- It is required that the power supply is stable and the grounding protection is good, It should not be used in severe natural conditions, especially in strong lightning weather.
5- It is strictly prohibited to enter water, iron powder and other metal objects that are easy to conduct electricity in the screen, LED display screen shall be placed in a low dust environment as far as possible, Large dust will affect the display effect, and excessive dust will damage the circuit.
If there is water ingress due to various reasons, please immediately cut off the power and contact the maintenance personnel, and use the display panel in the screen until it is dry.
6- Switching sequence of LED display:
A: First turn on the control computer so that it can operate normally, and then turn on the large LED display screen.
B: Turn off the LED display before turning off the computer.
7- When playing, do not stay in the full white, full red, full green, full blue and other full bright images for a long time, so as to avoid excessive current, excessive heating of the power line, damage to the LED beads, and affect the service life of the display screen. Do not disassemble or splice the screen at will.
8- It is recommended that the rest time of LED screen should be more than 2 hours every day, and the large LED screen should be used at least once a week in the rainy season, Generally, the screen should be turned on at least once a month for more than 2 hours.
9- The led screen surface can be wiped with alcohol, or dusted with a brush or vacuum cleaner, instead of directly wiping with a damp cloth.
10- One of the most important 10 ways to maintain LED display LED screen shall be checked regularly for normal operation and circuit damage, If it does not work, it shall be replaced in time. If the circuit is damaged, it shall be repaired or replaced in time. Nonprofessionals are not allowed to touch the internal circuit of the large LED display screen to avoid electric shock or damage to the circuit.https://egyled.info/en/products/
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