介绍
As an important tool for modern information dissemination, outdoor LED displays have been widely used in various fields.
However, in high altitude areas, they face extreme climate challenges such as low temperature, low pressure, high humidity, strong wind and strong ultraviolet radiation. How to ensure that outdoor LED displays can operate stably under these harsh conditions? The article tells you the answer.
1. What effects may high altitude areas have on LED display screens?
1). Temperature rise and heat dissipation issues
- Temperature rise:
As the altitude increases, the air becomes thinner, and the ability of air convection heat transfer weakens, causing the temperature inside the LED display screen to rise easily.
- Heat dissipation difficulties:
The temperature in high altitude areas is usually lower, but the LED display screen will generate heat when working. Due to the thin air, the natural convection heat dissipation effect decreases.
If the heat dissipation design is unreasonable, it may cause the internal temperature of the display screen to be too high, affecting the service life and display effect of the LED lamp beads.
2). Degraded electrical performance
- Degraded insulation performance:
The air in high altitude areas is thin, and the air density and the strength of the insulating medium are reduced, which may cause the insulation performance of the LED display screen to decrease and increase the risk of leakage.
- Reduced electrical gap breakdown voltage:
As the altitude increases, the air pressure decreases, which may cause the breakdown voltage of the electrical gap inside the LED display screen to decrease, increasing the risk of a short circuit.
- Corona and discharge phenomena:
In a high altitude and low-pressure environment, corona and discharge phenomena are prone to occur, which may cause damage to the circuit system of the display screen.
3). Abnormal display
Colour distortion:
Changes in air pressure and temperature at high altitudes may affect the colour performance of LED displays, resulting in colour distortion or screen flickering.
Brightness reduction:
As the altitude increases, the air becomes thinner, which may cause the brightness of the LED display to decrease, affecting the visual effect.
4). Damage to physical structure
- Accelerated material ageing:
The intensity of ultraviolet radiation in high altitudes is high, and long-term exposure to ultraviolet rays will accelerate the ageing of the LED display housing and internal electronic components.
- Degraded sealing performance:
Due to the increase in the internal and external pressure difference, the sealing performance of the LED display may be reduced, and dust and moisture may easily enter the interior of the display, affecting its normal operation.
5). Other effects
- Voltage fluctuations:
The power supply at high altitudes may be unstable, and the voltage fluctuations may be large, which may cause damage to the circuit system of the LED display.
- Difficult installation and maintenance:
The complex terrain and harsh climate in high altitudes put forward higher requirements for the installation and maintenance of LED displays.
2. Measures for outdoor LED display screens to cope with extreme climates in high-altitude areas
1). Rainproof, waterproof and moisture-proof
1.1). Use modular design to make LED display screens:
- 高防水等级：
Ensure that the modules and cabinets of the LED display screens reach IP65 or higher IP68 waterproof level.
This means that the display screen can withstand strong water jets and long-term water immersion, effectively preventing moisture from invading the internal circuit and ensuring the normal operation of the display screen.
- 模块化设计：
The modular design makes the LED display screen easy to disassemble and repair, and it is also conducive to improving the waterproof performance because each module can be waterproofed independently.
1.2). Module glue encapsulation and waterproof cabinet:
- Module glue encapsulation:
Glue encapsulation is performed inside the LED module, and glue is brushed on the back to enhance its waterproof performance. Glue can fill the gaps inside the module to prevent moisture penetration.
- Waterproof cabinet:
Choose a waterproof cabinet with good sealing to install the LED module. The cabinet should be made of waterproof material, and the joints should be sealed with waterproof rubber rings to ensure the dryness inside the cabinet.
1.3). Regular cleaning and maintenance of LED display screens:
- Improve heat dissipation efficiency:
Regularly cleaning the dust attached to the inside and outside of the LED display screen can significantly improve the heat dissipation efficiency of the screen.
Dust will hinder the dissipation of heat, causing the temperature of the display screen to rise, which in turn affects its performance and life.
- Reducing water vapor adhesion:
Cleaning dust can also reduce the adhesion of water vapor and prevent malfunctions caused by moisture. In a high-humidity environment, water vapor easily condenses on the surface of the display screen, causing short circuits or damage.
2). Wind load and earthquake resistance
2.1). Select load-bearing steel structure steel to install LED display screens:
According to different installation methods (such as wall installation, hoisting, rooftop installation, column installation, etc.), select suitable load-bearing steel structure steel to support the LED display screen. The steel should have sufficient strength and rigidity to resist wind loads and vibrations.
2.2). Strictly implement wind load and earthquake resistance standards:
When designing and installing LED display screens, they must be strictly implemented in accordance with wind load and earthquake resistance standards.
This includes requirements for the calculation of structural strength, inspection of connection firmness, implementation of shock reduction measures, etc. Ensure that the display screen will not fall or be damaged in bad weather, and ensure the safety of personnel and equipment.
3). High-temperature resistance and heat dissipation
3.1). The LED display screen adopts a macro-permeable design:
The macro-permeable design allows the heat inside the LED display screen to be dissipated more effectively. At the same time, the use of high-density and high-precision circuit boards can also reduce the circuit load and reduce heat generation.
3.2). Ensure that the LED display screen is well-ventilated:
When installing the LED display screen, ensure that the environment in which it is located is well ventilated. If necessary, heat dissipation equipment such as air conditioners or fans can be installed to maintain the normal operating temperature of the display screen.
High temperature will accelerate the aging of LED lamp beads, affecting the display effect and life.
3.3). Select high-efficiency power supply and driver IC:
A high-efficiency power supply and driver IC can reduce the rise in temperature in the system and improve the stability and reliability of the LED display screen.
Selecting power supplies and driver ICs with low power consumption and high efficiency can reduce energy loss and heat generation and extend the service life of the display screen.
4). Improved weather resistance
4.1). Top-quality materials for LED display accessories:
All accessories of the display, such as lamp beads, circuit boards, boxes, etc., should be made of top-quality materials. These materials should have high weather resistance and be able to maintain stable performance in extreme climates, such as high temperature resistance, low temperature resistance, and moisture resistance.
4.2). Special testing and treatment of key components of LED display:
Special testing and treatment of key components such as power boards and driver ICs, such as high voltage resistance test, high-temperature resistance test, and low-temperature resistance test.
Ensure that these components can work normally under various harsh conditions and will not be damaged or fail due to environmental changes.
5). Lightning protection
5.1). Install lightning rods and other lightning protection equipment to protect the LED display:
Lightning rods and other lightning protection equipment are installed on the supporting structure of the LED display to guide the lightning current safely into the ground.
This can prevent lightning from directly hitting the display or entering the inside of the display through other means, causing damage.
5.2). Install a power lightning arrester in the distribution box to protect the electrical safety of the LED display:
Installing a power lightning arrester in the distribution box can effectively prevent lightning from entering the LED display through the power line.
The power lightning arrester can absorb or disperse the lightning current, protect the electrical safety of the display, and prevent it from being damaged by lightning.
6). Comprehensive measures recommended
6.1). Regular maintenance and inspection of the LED display:
Regular maintenance and inspection of the LED display include waterproof performance, structural stability, heat dissipation efficiency, electrical safety, and other aspects.
Timely detection and handling of potential problems to ensure the long-term stable operation of the display.
6.2). Select a professional installation team to install and maintain the LED display:
Select an installation team with rich experience and professional qualifications to install and maintain the LED display. They are familiar with the climate characteristics and installation requirements of high-altitude areas and can ensure the installation quality and reliability of later maintenance.
6.3). Equipped with an intelligent monitoring system to monitor the operating status of the LED display:
Consider equipping an intelligent monitoring system to monitor the operating status and environmental parameters of the LED display in real-time, such as temperature, humidity, wind speed, etc. When an abnormal situation occurs, the system can issue an alarm in time and take measures to protect the display from damage.
3. Specific case analysis
1). Outdoor LED display project of the Obelisk in Buenos Aires, Argentina
The Obelisk is a landmark building in Buenos Aires, the capital of Argentina. This project was completed by the world’s largest beverage company, Coca-Cola, and the local government. A 576-square-meter outdoor LED display was installed near the obelisk, which is the largest outdoor LED display in Latin America.
1.1). Analysis of success factors
1.1.1). Technical features of the display:
- Innovative products:
The project uses innovative LED display products with light, thin, and transparent characteristics. Compared with conventional box-type displays, this display is 65% lighter, which greatly reduces the load requirements of the screen on the building.
- High-definition and bright display effect:
The display has a high-definition and bright display effect, which can show amazing visual power and image clarity even in the sun.
1.1.2). Installation measures:
- Integration with the building:
The LED display is cleverly integrated with the obelisk and its surrounding buildings, which does not affect the appearance of the building and makes full use of the traffic and attention of the landmark building.
- 高透明度：
The high transparency of the LED display screen makes the ventilation and natural lighting inside the building unaffected, and at the same time enhances the coordination between the display screen and the surrounding environment.
1.2). Case experience summary and reference
1.2.1). Summary of successful experience:
- Technological innovation and product selection:
When applying outdoor LED display screens in high-altitude areas, technological innovation and product selection are the key. Selecting innovative products with characteristics such as light, thin, and transparent can not only meet the requirements of display effects, but also reduce the load requirements on buildings.
- Combining with landmark buildings:
Combining outdoor LED display screens with landmark buildings can make full use of the traffic and attention of landmark buildings, and increase the exposure and commercial value of the display screen.
1.2.2). Reference suggestions:
- Consider local climate and environmental factors:
Although specific climate and environmental factors are not directly mentioned, high altitude areas are often accompanied by special climate and environmental conditions, such as low temperature, strong wind, etc.
When designing and installing display screens, these factors should be fully considered to ensure the stable operation of the display screen.
(The video comes from YouTube user: blunt action)
4. Future prospects for outdoor LED display screens
With the advancement of technology and the continuous growth of market demand, the application of outdoor LED display screens in high-altitude areas will show the following development trends:
- 更广泛的应用场景：
In the future, outdoor LED display screens will not only be limited to traditional fields such as commercial advertising and information release but will also penetrate into cultural tourism, urban landscapes, sports events, and other fields.
In high-altitude areas, such as snow-capped mountains, plateaus, and other special attractions, outdoor LED display screens will become an important window for displaying local culture, scenery, and tourism information.
- Higher technical requirements:
The climatic conditions in high-altitude areas put forward higher technical requirements for outdoor LED display screens.
In the future, outdoor LED display screens will need to have stronger weather resistance, wind load resistance, earthquake resistance, high temperature resistance and heat dissipation capabilities, as well as better lightning protection performance to adapt to the challenges of extreme climate environments.
- More intelligent management:
With the continuous development of technologies such as the Internet of Things, big data, and artificial intelligence, the management of outdoor LED display screens will become more intelligent.
Through remote monitoring, intelligent scheduling, and fault warning, real-time management, and maintenance of outdoor LED display screens can be achieved to improve their operating efficiency and reliability.
结论
In summary, outdoor LED displays face many challenges in high altitude areas, but through technological innovation and quality improvement, we are able to overcome these difficulties.
From rain and water resistance, wind load resistance, high temperature resistance, weather resistance to lightning protection, we can take effective measures to ensure the stable operation of the display.
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