With the improvement of LED display safety and quality requirements, more and more LED display engineers and dealers will choose LED display with high IP protection level. Therefore, in today’s increasingly fierce competition, if LED display products want to gain a competitive advantage in the market, it is necessary to carry out IPXX protection level test.
Want to buy qualified waterproof, moisture-proof, dust-proof LED display. We first have to understand what is IPXX protection level, second we have to understand LED display production process is how to do waterproof, moisture-proof and dust-proof process, third we install LED display and use LED display to do what measures to ensure waterproof, moisture-proof and moisture-proof treatment.
What is IPXX protection level
The I1.P dust and Water protection rating is a standard developed by the International Electrotechnical Commission (IEC) to assess the protection of electrical equipment against dust and water. The IP protection rating consists of two numbers, the first indicating the dust protection rating and the second indicating the water resistance rating. The higher the number, the better the protection. Here, I organize a waterproof level for customers digital map, very intuitive display
The function of the number in the dust-proof grade.
IPX4: protective water splash, can withstand the flow of water sprayed from all directions, simulate the rain sputtering situation.
IPX5: protects the low-pressure water column and can withstand the 6.3mm inner diameter of the water column emitted from the nozzle.
IPX6: Protects the strong water column, can withstand the strong water column of 12.5mm inner diameter from the nozzle.
IPX7: protection against temporary immersion, can withstand immersion in water according to the specified time and pressure.
IPX8: Protected continuous immersion, the equipment can be continuously submerged and maintain normal operation.
IPX9: Protects against high pressure/high temperature cleaning and can withstand the intense and powerful water flow of the high pressure washer.
Outdoor/indoor LED display with dust and water resistance rating has the following advantages:
Ensure the safety of the LED display: IP65 protection level testing can help ensure that the product will not be damaged by dust and water during use, so as to ensure the safety of the product.
Prolong the life of the product: IP65 protection level testing can help extend the service life of the product. When the product is damaged by dust and water, it will accelerate the wear and aging of the LED display product, thereby shortening the service life of the outdoor LED display.
Improve the quality of outdoor/indoor LED display: IP anti-65 protection level test can help improve the quality of products. When the LED display has a high IP protection level, it can prove that the manufacturing process and material quality of the LED display is high, thus improving the quality of the product.
Meet the market threshold: Obtain the protection level certification, meet the market entry threshold, and improve the competitiveness of products.
Reduce after-sales costs: When the product fails, if the LED display is not tested for IP65 protection level, it may not be possible to determine the cause of the failure, resulting in an increase in the after-sales cost of the product.
It can be said that IP protection testing can fully verify and guarantee the dustproof and waterproof performance of the product, making the product more reliable and more competitive, thus enhancing the trust of users. This is an essential testing means in the process of product development and production.
What are the common dust and waterproof tests of LED display?
Our common outdoor LED display heat protection level is IP65
– Dust resistance: completely dust resistant, no particles enter.
– Waterproof ability: protect against low-pressure water jet.
– Advantages: absolute dust, can also withstand strong water flow, wide range of use.
There are 5 kinds of waterproof, moisture-proof and dust-proof processes commonly used by LEGIDATECH in the production process.
In view of the advantages and disadvantages of 5 different protection processes, I have made the following arrangement for you LED display manufacturers, brands and processing manufacturers to do LED protection process reference:
Advantages: excellent water resistance (immersion waterproof), cheap unit price, often used in outdoor LED display;
Disadvantages: acid and alkali resistance, salt spray corrosion; Poor moisture-proof effect, resulting in short service life, with 3-5 years of repair rate is very high, high moisture area life even shorter; Thicker coating, not suitable for small pitch LED display; High maintenance cost: the product is a “lifetime” product, difficult to remove, can not achieve the replacement of components, and the repair cost is higher for cross-regional multinational sales brands.
Three anti-corrosion paint
Advantages: excellent water resistance, better moisture resistance, the unit price is cheaper, can meet the general waterproof and moisture-proof needs;
Disadvantages: poor corrosion resistance, higher requirements for salt spray resistance (such as: salt spray resistance for 72 hours), three anti-paint can not reach the standard, and the material is not environmentally friendly, there is a very heavy harsh smell, unfriendly to the operator.
Nano coating agent
Advantages: good water resistance, excellent moisture and corrosion resistance (acid and alkali resistance, salt spray 96 hours without change); Convenient operation process: no shielding, soaking for 3 seconds can reach IPX6, IPX7 waterproof grade; Low cost: no OEM, back and forth transportation and equipment input cost; Ultra-thin: nanometer thickness (0.1-3 microns); No harmful substances such as VOC; Odorless: friendly to the environment and friendly to the human body. It is very suitable for LED small pitch and COB display which have high requirements for performance and quality;
Disadvantages: water-resistant bare board long-term immersion, not suitable for outdoor LED display, can be used with three anti-paint or potting glue.
Four LED display box adopts sealed box. Adopts the box structure: the display box is equipped with a display module in front of the box, and the display drive circuit board is fixed inside the box. The switching power supply is installed on the back cover of the box. In the back cover of the box is also installed with exhaust fans, stamping window and so on. The internal and external surface of the box is sprayed with plastic treatment, with anti-corrosion, moisture-proof, anti-oxidation, flame retardant and other functions, to provide security for the work of the display body. As far as the structure of the display is concerned, the first module should be outdoor waterproof module, the back of the second module should be brushed with three anti-paint, third, the box should be waterproof box, sealing is better, you can do waterproof test, sprinkler test on the surface of the display. After a number of tests, the IP protection level of the outdoor LED display waterproof box must reach IP65 in order to achieve the true sense of waterproof.
The waterproof level of the five indoor LED modules is generally IP20,IP30,IP31, we only need to apply three anti-paint on the back of the circuit board in the production of conventional indoor modules, and in the production of rental LED modules, our modules generally use IP31 plastic bottom shell and moisture-proof three anti-paint on the circuit board. The role of the three anti-paint is waterproof, moisture-proof and dustproof. For the indoor LED display module with smaller spacing, we generally use the HOB process.
There is no perfect process, only a more suitable comprehensive solution. LEGIDATECH focuses on the development and manufacture of fluorine-modified polyester nano-coating materials and the supply of integrated solutions for electronic protection. PiQNano nano coating agent is a new type of micro electronic /LED display protection treatment agent, excellent waterproof, moisture, salt spray and moisture and heat resistance, thickness is less than 1μm, make up for the lack of traditional three anti-paint, to achieve 360° full protection, including LED module display.
More interesting is: according to many customer feedback before the use of potting glue directly sealed to do waterproof treatment, the beginning effect is not bad, generally can be used 3-5 years, but 3-5 years of repair rate increased significantly, the majority of corrosion; The use of three anti-paint customer feedback, condensate phenomenon has a great impact, and can not meet the higher protection requirements such as 72 hours of salt spray resistance.
With the development of the industry, LED modules and other more and more fine, there are ordinary LED, usually used for outdoor and small pitch LED display, and even COB small pitch, usually used indoors, COB small pitch LED display protection, the traditional protection process: potting glue and three anti-paint can not meet the needs. Our cooperation with customers, nano coating agent passed the test, meet its performance requirements, and even more corrosion resistant, ultra-thin, convenient maintenance of the pursuit of COB small pitch LED display protection program a process, and even with three anti-paint or potting glue combined to become a new protection program.
We in the installation and use of LED display in the process of precautions
1, indoor LED display should pay attention to ventilation and humidity
For indoor display, first of all, moderate ventilation. Proper ventilation can help the water vapor attached to the display to evaporate quickly and reduce the relative humidity of the indoor environment. However, avoid ventilation in some windless and humid weather, which will increase the indoor humidity; Secondly, place desiccant in the room to reduce the moisture in the air by physical hygroscopic methods; Or open the air conditioning for dehumidification, if the display installation space is installed with air conditioning, you can open the air conditioning for dehumidification in humid weather.
2, outdoor LED display focus on waterproof
The outdoor LED display itself in the environment is more complex than the indoor, moisture can take indoor methods, but the outdoor screen should not only consider the problem of humidity, but also do a good job of waterproof and other daily maintenance work, especially in the rainy season, so a good sealing installation can help the display to reduce the risk of water, regularly clean the dust attached to the display inside and outside, It can also help the display to better heat dissipation and reduce the attachment of water vapor.
3, moisture into the LED display may cause dead lights
So the most important thing is that the waterproof outdoor full-color LED display is the most important prevention in the production and construction process.
In the process of use, excessive humidity caused by LED display PCB board, power supply, power line and other zero devices are relatively easy to be oxidized corrosion, resulting in failure. Therefore, this requires us to make LED display, the PCB board to do a good job of anti-corrosion treatment, such as surface coating three anti-paint, etc., power and power line to choose high-quality accessories. The selection of waterproof box, good sealing, screen body must reach IP65. The welding place is the most easily corroded place, pay attention to do a good job of protection, especially the frame, easy to rust, do a good job of anti-rust treatment.
Secondly, for different unit board materials, you need to use professional waterproof coating, here the user outside P10 full-color outdoor LED display as an example. First of all, confirm that the P10 full-color outdoor unit board is magnet adsorption or screw (screw effect is good, the magnet is slightly worse); Secondly, there is no sink on the unit board kit, if there is, then the front waterproof is basically not a big problem, even if the unit board is fixed with a magnet. Finally, we also need to pay attention to the backplane waterproof problem of outdoor LED display, because, in the process of using the display, the backplane LED display is not only heat dissipation treatment, but also in the treatment of waterproof performance, there is great convenience. When dealing with the waterproof coating on the back, pay more attention to the waterproof performance of the small strip display aluminum-plastic board on the back, and use an electric drill to design rows of water ports under the aluminum-plastic board, which is conducive to the waterproof display screen and the heat dissipation of the display screen. It is the best display processing method.
4, and the other part needs to be implemented in the specific construction site
In the structural design of the combination of prevention and drainage; After the structure is determined, according to the characteristics of the structure, the sealing strip material with the performance of hollow bubble tube structure, small compression permanent deformation rate and large elongation at break can be considered; After selecting the sealing strip material, it is necessary to design the appropriate contact surface and contact force according to the characteristics of the sealing strip material, so that the sealing strip is squeezed into a dense shape. In some installation, anti-sink and other positions, do key protection to ensure that there will not be any water inside the display screen. In this way, when the display is used in the rainy season, there will not be any quality problems caused by human factors.
- LED display in high temperature and high humidity areas needs to be opened frequently to dehumidify
Finally, whether it is an indoor screen or an outdoor screen, the most effective way to avoid moisture damaging the function of the display is to use it frequently, and the display itself in the working state will generate some heat, which can evaporate some water vapor, which greatly reduces the possibility of short-circuit caused by humidity. Therefore, the display screen that is often used has much less influence on the humidity than the display screen that is not commonly used. Industry insiders suggest that the LED screen display should be used at least once a week in the plum rain season, and the screen should be turned on at least once a month for more than 2 hours.
Summary: LED display whether outdoor or indoor LED display, in the process of production and use need to do a good job of waterproof, moisture-proof and dust-proof work, to extend the service life of LED display, the perfect display of video and pictures.