In the current wave of smart city construction, LED light pole screen is gradually becoming a new highlight of urban landscape and intelligent interaction. Unlike traditional large LED display screens, LED pole screens are small, flexible and easy to install.
They have been widely used in public places such as road lighting poles, bus stops, commercial blocks, etc. However, for pole screens, it requires higher quality. Especially in terms of high temperature resistance, it has become a technical difficulty that manufacturers must overcome. We will explore in depth the details.
Special challenges and requirements of pole LED screens
LED pole display screens, as the name suggests, are small LED display screens installed on street light poles. Due to the particularity of its installation location, LED pole screens face more severe environmental tests than ordinary display screens.
First, the light pole screen usually adopts an all-metal structure with extremely limited internal space, which limits the flexibility of heat dissipation design.
Secondly, the pole LED display screen is mostly installed outdoors and directly exposed to the natural environment, especially in the hot summer afternoon under direct sunlight. Even without power, its internal temperature may quickly rise to more than 80℃. For electronic devices including CPU main control chips, such a high temperature environment is undoubtedly a huge challenge.
High temperature will not only cause the performance of electronic components to decline, or even cause failures, but may also cause physical damage, such as melting of resistors and capacitors, deformation of plastic connectors, etc., which are often irreversible. Therefore, how to effectively control the internal temperature of the pole video screen? It is not only the key to its stable operation, but also a necessary condition for extending the life of the equipment and reducing maintenance costs. So how can we reduce the temperature?
Control temperature from the source
When facing the high temperature problem of pole LED screen displays, our first and core strategy is to effectively reduce the generation of heat from the source. To achieve this goal, it depends on the fine design and optimization of multiple key links such as power efficiency, drive technology, and hardware selection. :
Use high-efficiency power supply
Using a power supply with high conversion efficiency is the first step to reduce the heating of LED pole screens. High-efficiency power supplies can significantly improve the utilization efficiency of electrical energy by optimizing circuit design. Adopting advanced power factor correction (PFC) technology and synchronous rectification technology, and directly convert more electrical energy into light energy output rather than heat energy.
Common cathode technology:
Compared with the traditional common anode driving method, the common cathode (4.2V) driving technology shows a higher efficiency in energy utilization. Under the common cathode architecture, the negative pole (cathode) of the LED lamp beads is uniformly grounded, and the positive pole (anode) is controlled by the driving circuit. This design reduces unnecessary current loss and reduces power consumption, thereby effectively reducing heat generation. In addition, the common cathode technology also facilitates more precise brightness control and grayscale adjustment, improving the display effect.
Power supply margin
Using a power supply with a margin of more than 30% is an important measure to prevent the pole screen from overheating. The existence of the margin allows the power supply to work stably without overloading, and even in the face of instantaneous load fluctuations or increased ambient temperature, it can maintain the stability of the output voltage and avoid additional heat caused by overload operation.
- Prolong the service life of the power supply
- Improve the stability of the entire system
- Improve reliability.
Energy-saving driver IC
We should Select energy-saving driver ICs such as 2153. It is another key to reducing the heating of the pole display. We use these low-power driver ICs, which can accurately control the driving current of LED lamp beads and achieve high efficiency and energy saving by adopting advanced PWM (pulse width modulation) control technology, intelligent dimming algorithm, etc.
- With over-temperature protection
- Short-circuit protection and other safety functions
- Further improve the reliability and safety of the system.
Large chip LED lamp beads
- Although the use of a brightness of up to 7000nit large chip LED lamp beads may theoretically bring slightly higher power consumption, its excellent luminous efficiency and low heat generation per unit area make it an ideal choice for LED light pole screens.
- Brighter and clearer visual effects
- Optimize chip structure and packaging technology
- Effectively reduce thermal resistance
- Improve heat dissipation efficiency
- Reduce heat accumulation.
Photoresistor controls brightness
In addition, we use photoresistors to sense the intensity of ambient light and automatically adjust the brightness of the LED light pole screen. Photoresistors can adjust the brightness level of LED lamp beads in real time according to changes in external light. While ensuring the display effect, it can minimize unnecessary energy consumption and heat generation.
- Improve user experience
- Extend the service life of the device.
Temperature-controlled fan
In addition, we will also install a temperature-controlled fan. The temperature-controlled fan can automatically adjust the speed according to the changes in internal temperature:
- When the temperature rises, the speed is increased to enhance the heat dissipation effect;
- when the temperature drops, the speed is slowed down to save energy. Effectively reduce the temperature of the equipment
- Balance energy consumption and heat dissipation requirements
- Maximize overall energy efficiency.
Remote hard power off
Timed or on-demand power off of the equipment through a remote control system is an effective way to prevent the LED light pole screen from accumulating heat due to long-term operation. Our remote hard power off mechanism design allows administrators to remotely shut down the equipment when necessary, giving it sufficient rest time to avoid overheating problems caused by continuous operation.
- Extend the service life of the equipment and
- Ensure its normal operation at critical moments.
Innovative structural design improves heat dissipation efficiency
In the process of solving the high temperature problem of the pole LED screen, in addition to reducing the heat source, we also optimize the structural design to improve the heat dissipation efficiency. We conduct in-depth research and innovation in many aspects such as box structure, ventilation design, material selection, and internal layout.
Large air inlet design
In order to achieve rapid heat dissipation, we have the largest air inlet at the bottom of the box. These air inlets can not only ensure that there is enough fresh air flowing into the cabinet, providing sufficient airflow supply for heat dissipation, but also effectively reduce the temperature inside the cabinet.
In order to prevent dust and other impurities from entering the box and affecting the heat dissipation effect, we will also install dust screens or other filtering measures at the air inlet.
Efficient air outlet and fan layout
In order to ensure that the heat can be quickly discharged from the cabinet, the air outlet should be designed to be large enough, and a sufficient number of fans should be installed to form an effective convection heat dissipation system. We use a careful fan layout to ensure maximum heat dissipation and consider redundant design.
All-aluminum structure cabinet
The LED cabinet material also has a direct impact on the heat dissipation efficiency. In order to improve the heat dissipation efficiency, we use aluminum alloy materials with excellent thermal conductivity to make the cabinet.
Aluminum alloy not only has good mechanical properties and corrosion resistance, but more importantly, its high thermal conductivity can quickly transfer internal heat to the surface of the box. In this way, the heat can be quickly dissipated by natural convection or fan forced convection.
Optimize internal layout
In addition, the wiring layout inside the cabiet also has an important impact on the heat dissipation efficiency. In order to avoid air circulation obstruction caused by disordered wiring, we rationally plan the wiring path to ensure smooth air flow.
At the same time, the spacing between electronic components should also be appropriately increased, which is conducive to the natural dissipation of heat.
When designing the layout, we will also consider the location of heat-sensitive components and try to place them in areas with better heat dissipation to reduce the risk of performance degradation or failure due to overheating.
Material selection and design for high temperature resistance
In the process of solving the high temperature problem of LED light pole screens, less heat generation and rapid heat dissipation are the basis, but these measures alone are not enough to ensure the stable operation of the equipment in extreme environments.
Therefore, in order to enable the LED pole video screen to have the ability to withstand high temperatures, we will also consider material selection and design more comprehensively.
Single-chip microcomputer main control card
In order to reduce system costs and improve reliability, we usually choose single-chip microcomputers with simple and stable functions and small memory requirements. This type of single-chip microcomputer not only has a high cost-effectiveness, but also has a low sensitivity to temperature changes. So,It is more suitable for working in high temperature environments.
When choosing a single-chip microcomputer, we pay great attention to its high temperature resistance. We use some high-performance MCUs that have been specially processed to maintain stable operation under extremely high temperature conditions. These MCUs usually have a wide operating temperature range. They can operate stably for a long time in high temperature environments without failure.
Military-grade components
In addition to the MCU master control card, our LED light pole screen master control card also uses military-grade resistors, capacitors and other key components. These components have higher reliability and stability, and can work normally in harsh environments such as high temperature, low temperature, and humidity without failure due to environmental changes.
Although the cost of military-grade components is high, it is necessary to ensure the long-term stable operation of the Pole LED display in a high temperature environment.
High-temperature resistant wire
In addition to the MCU master control card and military-grade components, the connecting wires inside our cabinet are also made of special materials that can withstand high temperatures.
In a high temperature environment, the insulation layer of ordinary wires is prone to aging, hardening, or even cracking, resulting in a decrease in insulation performance, which in turn causes electrical problems such as short circuits. High-temperature resistant wires can maintain stable insulation performance under high temperature conditions to prevent electrical failures caused by high temperatures.
Our high temperature resistant wires are made of special materials, such as fluoroplastics, silicone rubber, etc. These materials have high high temperature resistance and excellent insulation performance. They can operate stably for a long time in high temperature environments without failure.
In addition, with the advancement of technology and innovation of materials, we have more efficient and environmentally friendly heat dissipation solutions in the future. We will continue to pay attention to industry trends, actively introduce new technologies and new materials, and continuously improve the high temperature resistance of LED light pole screens.
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Conclusion
We have introduced solutions for LED pole screens to operate in high temperature environments. In addition, we will also customize the design according to the actual application. We will make the LED light pole screen can still operate stably in harsh environments. If you need an LED light pole screen, please feel free to contact us.
