介绍
The rainy season has become a headache for many users. Some users will find that their LED显示屏 frequently malfunctions during the rainy season.
Either the lamp beads are not lit, the circuit board is short-circuited, or the display effect is greatly reduced. Why is this so?
This article will take you to the reasons for the frequent failures of LED display screens in the rainy season environment, and provide practical prevention and solution measures to help you easily cope with the challenges of the rainy season.
目录
1. The impact of environmental factors in the rainy season on LED display screens
1.1). Impact on lamp beads
The air is humid in the rainy season, just like there are many small water droplets in the air. These water droplets can easily condense into water on the surface and inside the LED display screen.
The lamp beads are the key components of the display screen. Once damp, the luminous efficiency will be “discounted” and become less bright.
Moreover, the humid environment will accelerate the ageing of the electronic components in the lamp beads and shorten their lifespan.
What’s worse, if the water droplets penetrate into the circuit of the lamp beads, it is easy to cause the lamp beads to short-circuit and directly “scrap”.
1.2). Impact on the circuit board
The circuit board is the “brain” of the display screen, which is covered with various electronic components and conductive circuits.
In a humid environment, the circuit board is like being placed in “humid air”, and the metal wires will accelerate oxidation, just like iron rusts, and the conductivity will deteriorate.
The insulating material of the circuit board will also be “eroded” by moisture, the insulation performance will decrease, and it is easy to short-circuit.
In addition, the solder joints and components on the circuit board will also loosen and be damaged due to moisture, just like things are more likely to break in a humid environment, which will cause various faults on the display screen, such as sudden failure to light up or abnormal display.
2.1). Impact on the structure of the display screen
The temperature changes greatly during the rainy season, and the display screen cabinet, circuit board, and other components are made of different materials, which have different degrees of thermal expansion and contraction.
Just like when it is hot in summer, things will expand; when it is cold in winter, things will shrink. When the temperature changes, the display screen’s cabinet may deform and crack.
For example, the connection between the outer shell of the cabinet and the circuit board may loosen due to different expansion and contraction, affecting the structural stability of the display screen.
This is just like the unstable foundation of a house. The display effect of the display screen will also deteriorate, and there may even be safety hazards.
2.2). Impact on the performance of electronic components
The normal operation of the display screen is inseparable from various electronic components, such as capacitors and resistors in the power module.
The performance of these components is also affected by temperature changes.
For example, when the temperature changes, the electrolyte inside the capacitor will “get angry”, the capacity will decrease, and the leakage current will increase.
The resistor will also change its resistance value due to temperature changes.
When the parameters of these components change, the power supply of the display screen will be unstable, and there may be problems such as unstable brightness, flickering, or partial area non-display.
Moreover, temperature changes will also make electronic components age faster and shorten their lifespan.
3.1). Physical damage to internal components
If rainwater directly falls on the display screen, it is easy to penetrate through the gaps in the outer shell, vents, etc.
Once rainwater penetrates, it will be a “disaster” for components such as lamp beads, circuit boards, and power modules.
When lamp beads touch water, they are easy to short-circuit; when circuit boards are soaked in water, oxidation corrosion will accelerate.
Components of the power module may also be burned. If these parts are broken, the display screen will not work properly.
3.2). Impact on heat dissipation and optical performance
There are many impurities and pollutants in rainwater, and this dirt will adhere to the surface or inside of the display screen.
They will block the heat dissipation channel, making the display screen’s heat dissipation worse and raising the temperature inside.
When the temperature is high, electronic components are more likely to break.
Moreover, these impurities will make the display screen look blurry, the light will be blocked, the brightness and contrast will decrease, and the display effect will be greatly reduced.
2. The unqualified factors of the LED display screen itself lead to frequent failures in the rainy season
1). Insufficient protection level
The protection level is the dust and water resistance of the display screen, which is expressed by IP numbers.
For example, IP54 can only prevent dust and small splashes of water, which is suitable for indoor use. If it is placed outdoors in the rainy season, it will not be able to withstand it.
IP65 is much more powerful; it can prevent spraying water and is suitable for outdoor use, but if it encounters heavy rain, it will still be a bit difficult.
IP67 is even more powerful; it can be soaked in water for a short time without any problem, and it is especially suitable for outdoor use in the rainy season.
However, some display screens are not designed to have the right protection level. For example, they are clearly designed for outdoor use, but only IP54 is used.
Once the rainy season comes, they will definitely not be able to withstand it.
Some display screens, although marked as IP65 or IP67, actually do not meet that standard at all.
For example, the cabinet is not tightly sealed, the ventilation holes are not well protected, and the waterproof strips are aged after long-term use, which becomes the “entrance” for rainwater and moisture.
Take the cabinet seal, for example. If the sealing strips are aged, deformed, or not installed properly, rainwater will get in through the gaps.
The same is true for the ventilation holes. If the protective net is of poor quality or there is no waterproof film, rainwater will also get in from there.
If the waterproof strips are exposed to the outside for a long time, they will easily age and crack, and the waterproof function will be gone.
These small problems will cause big trouble for the display screen in the rainy season.
2). Poor material quality
The components, such as the lamp beads, circuit boards, and power modules of the LED display screen, are of poor material quality and are easily damaged in the rainy season.
Lamp beads are the key to the display screen’s lighting. If the quality is poor, it is easy to have light decay (that is, the brightness becomes dim) or dead light (does not light up directly) after being damp.
Some low-quality lamp beads are poorly waterproofed. Once they encounter a humid environment, the internal circuit will short-circuit.
Some bad manufacturers use low-quality lamp beads to save money, and these lamp beads are particularly easy to break in the rainy season.
The same is true for circuit boards. If the substrate and copper coating are of poor quality, they are prone to moisture absorption and oxidation corrosion.
In a humid environment, the conductivity of the circuit board will deteriorate, and even short-circuit or break.
If the electrolytic capacitor in the power module is of poor quality, it is easy to leak liquid when the temperature and humidity change, causing the power module to fail.
In order to reduce costs, these bad manufacturers cut corners in material procurement and production processes.
They use inferior materials and do fewer processes, resulting in a significant reduction in the reliability of the display screen in the rainy season.
Therefore, when buying a display screen, you must choose materials of good quality and find a regular manufacturer, so that there will be fewer problems in the rainy season.
3). Installation and maintenance are not in place
If there are problems in the installation and maintenance process, the display screen is also prone to failure in the rainy season.
During installation, if the location is not chosen well, such as installing the display screen in a place where water easily accumulates or is humid, problems will definitely occur when the rainy season comes.
If the installation is not carried out according to the specifications, such as the protective shell is not sealed well and the line connection is loose, rainwater and moisture will take advantage of the opportunity to enter.
Maintenance is also very important. If the display screen is not cleaned for a long time, dust will accumulate on the surface and inside, and the heat dissipation and protection performance will deteriorate.
Dust blocks the heat dissipation channel, the internal temperature rises, and the electronic components are more prone to breaking.
If the damaged protective parts, such as waterproof strips and sealing pads, are not replaced in time, rainwater will also seep in from there.
If waterproof and moisture-proof testing and maintenance are not performed regularly, potential problems will not be discovered, and the display screen will easily get into big trouble when the rainy season comes.
In short, to reduce the failure of the display screen in the rainy season, the protection level must be selected correctly during the design, the material quality must be up to standard, and the installation and maintenance must not be sloppy.
3. Prevention and solution measures for damage to LED display screens during the rainy season
1). Improve the protection level
In simple terms, you have to choose the right “protective clothing” for the display screen. If the display screen is placed indoors, the protection level of IP54 may be sufficient, because the indoor temperature is generally not too humid.
However, if it is placed outdoors, especially in places with heavy rain, at least IP65 should be selected. If you often encounter heavy rain, you must use IP67, so that you can withstand the “attack” of rain.
When manufacturing the display screen, you must use good materials. For example, the sealing strips must be of good quality, so that they are not easily aged and deformed, and can effectively block rain and moisture.
The design of the box is also very important. The smaller the gap, the better, and the tighter, the better, so rainwater has no chance to get in.
The ventilation holes cannot be sloppy. A layer of waterproof and breathable membrane must be added, so that it can dissipate heat and prevent rain.
2). Choose high-quality materials
When buying a display screen, you can’t just look at the price. The material quality of key components must be up to standard.
For example, lamp beads must be selected with good waterproofing performance so that they are not easy to break after being damp.
The same is true for circuit boards. They must be made of corrosion-resistant and moisture-proof materials so that they are not easily oxidised in a humid environment.
The capacitors and other components in the power module must be selected with strong anti-ageing ability. Otherwise, they will easily break down when the temperature and humidity change.
It is also important to understand the performance of the materials. For example, some materials are particularly moisture-proof, and some are corrosion-resistant.
If the right materials are selected, the reliability of the display screen in the rainy season can be greatly improved. In short, don’t go for cheap; quality is the key.
3). Standardised installation and enhanced maintenance
When installing the display screen, you must find a professional to do it, and the location is also critical.
Try to avoid places that are prone to water accumulation and moisture, such as low-lying areas or places near water sources.
During installation, the protective shell must be sealed well, and the line connection must be firm and not loose. Otherwise, rain and moisture will take advantage of the opportunity to enter.
Maintenance is also very important. Clean the display screen regularly and clean up all the dust so that the heat dissipation and protection performance can be maintained well.
It is also necessary to check regularly to see if the waterproof strips and sealing pads are damaged. If they are broken, they should be replaced in time.
At the same time, regular waterproof and moisture-proof tests are carried out to detect potential problems in advance and solve them in time, which can greatly reduce the probability of failures during the rainy season.
4). Technological improvement and innovation
Now, there are many new technologies and new materials available.
For example, the new waterproof and moisture-proof coating can form a dense protective film on the surface of the display, just like putting a “raincoat” on the display, which can effectively prevent the intrusion of rain and moisture.
There is also an intelligent monitoring system that can monitor the temperature, humidity, current and other parameters of the display screen in real time if an abnormality is found.
For example, if the temperature suddenly rises or the humidity exceeds the standard, the system will warn in advance and remind you of possible failures so that measures can be taken in time to prevent small problems from becoming big failures.
These new technologies can provide great help for the stable operation of LED display screens in the rainy season.
4. Other points worth noting
1). Power protection
The power cord is like the “lifeline” of the display screen. If it is soaked in rain, it is easy to have problems.
Therefore, you must use a waterproof power cord or put a waterproof cover on the interface, just like putting on a “raincoat” to block rain.
In addition, it is best to install a leakage protector in the power supply system.
In case of leakage, it can immediately cut off the power supply to prevent the equipment from being burned and protect people’s safety.
Although these small measures are simple, they can save lives at critical moments.
2). 散热管理
Heat dissipation is very important, especially in the rainy season. It is best to drain the outdoor display cabinet. Otherwise, rainwater will accumulate inside, just like soaking in water, and it is easy to break.
In addition, the cooling fan must also be waterproof, otherwise the humid air will damage the fan or bring in moisture from outside.
If the fan is broken, the display will easily “fever”, so it is important to choose a waterproof and moisture-proof fan.
3). Environmental monitoring
Install a humidity sensor next to the display, just like having a “weather forecaster” who can know how humid the surrounding area is at any time. If the humidity is too high, turn off the display quickly or use a dehumidifier to remove the moisture.
Temperature is also critical. It is not good to be too hot or too cold.
Install a temperature sensor and check the temperature at any time so that problems can be discovered in advance and prevent the display from “getting sick” in harsh environments.
4). Emergency measures
The weather changes quickly during the rainy season, and the power may go out at any time.
At this time, it is very useful to prepare a UPS (uninterruptible power supply), which can “extend the life” of the display screen during a power outage to prevent sudden power outages from burning the equipment.
In addition, it is best to prepare a simple emergency plan, such as how to quickly check whether the display screen has water ingress and how to deal with sudden failures in case of heavy rain.
In this way, when you encounter problems, you can solve them calmly.
5). Regular inspection
Regularly inspecting the display screen is like giving it a “physical examination”. Check for cracks, deformations, or poor sealing.
These small problems may become big troubles if not handled in time.
In addition to the appearance, check the inside to see if there are signs of water accumulation or moisture.
If you find any problems, use desiccant or dehumidification equipment to deal with them immediately.
Although regular inspections are a bit troublesome, they can detect problems in advance and avoid equipment damage.
6). User training
If the display screen is used by multiple people, be sure to give the operators simple training.
For example, tell them not to turn the machine on and off frequently in a humid environment during the rainy season, because this can easily damage the equipment.
Also, remind everyone not to splash water near the display screen, and don’t touch the wet display screen with your hands.
If the operation is standardised, the display screen will be used for a long time, and it will be safer.
5. Waterproof effect of BIBILED's outdoor LED display screen
BIBILED‘s 户外LED显示屏 has a protection level of IP65, which is amazing! We are very serious about each outdoor display screen.
They must undergo waterproof testing before leaving the factory, just like giving them a “physical examination” to ensure that there are no problems before shipping.
As long as you follow the requirements during installation, you don’t have to worry about heavy rain, and the display screen will definitely be stable.
六，结论
Although the rainy season is a “difficult hurdle” for LED displays, as long as you master the correct method, you can easily resolve the crisis.
I hope that the analysis and suggestions in this article can inspire you and help you keep the display screen running stably and achieve the best results in the rainy season.
最后，如果您想了解更多关于LED显示屏的知识， 请与我们联系.
