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Introducción:
As we all know, SMT surface mount technology has become very mature in the LED display market and has become the mainstream technology in the market. At present, SMD surface mount display has a market share of up to 95%. However, with the wide application of this technology, in some special environments, surface mount displays often face problems such as abnormal lamp beads, lamp beads damage, water vapor infiltration, dust accumulation, surface scratches, physical collisions, etc. Therefore, improving the protection level of lamp panels, reducing the failure rate of lamp beads, and improving the display effect have become the focus of many industrial enterprises.
AOB technology: a new solution to the LED lamp bead problem
The essence of these problems is to solve the damage caused by scratching and scrapping of the lamp plate during the installation and use of the surface mount screen, as well as the problem of being eroded by the cold air and water vapor of the air conditioner during long-term use. By improving these problems, the safety of installation and maintenance is improved, especially when major conferences and key images are displayed, there will be no color or brightness problems due to lamp bead defects. The overall lamp bead defect rate has been reduced to less than 5PPM. In order to solve these problems, AOB (plus plate) technology came into being.
What is AOB technology? What are its manifestations?
So, how does AOB technology solve these problems? AOB (plus board) is the last step in the production of LED surface mount displays. After the SMT process is completed, a film of polymer material is coated on the surface of the light plate. The display has gone through 72 hours of constant temperature aging of the white balance of the lamp panel and 24 hours of video aging of the entire screen, eliminating various defects caused by the production process and components. The isolation protection of AOB nano-coating reduces the LED failure rate to less than 5PPM, greatly improving the screen’s yield and reliability.
AOB technology has the following three main characteristics
Physical protection characteristics
The physical protection of AOB is achieved through the bottom layer filler, which has bonding properties similar to solder paste and is also an insulating material. The filler wraps the bottom of the LED as a whole, enhancing the LED’s ability to contact the bottom PCB. Laboratory tests show that the lateral thrust strength of conventional SMT welding is 1kg, while the lateral thrust strength of AOB products is 6kg, effectively solving the problem that the light board cannot be repaired due to bumps or even pads falling off during installation.
Chemical protection characteristics
The chemical protection of AOB is achieved by a matte transparent protective layer surrounding the LED. The protective layer is composed of a polymer material made of nano-scale coating technology, which completely seals the LED, blocks contact with the outside world, prevents water vapor from entering the LED, and is not affected by the environment during use. At the same time, the hardness of the material is HRC8, which makes the screen surface less prone to scratches.
Improved protection characteristics
Improved Viewing Angles: The matte transparent protective layer acts like a lens, increasing the LED’s light emission angle from 140° to 170°.
Reduced Graininess: AOB reduces the graininess of the light, decreasing the moiré effect and enhancing light mixing characteristics.
Consistent PCB Colors: AOB technology addresses the issue of inconsistent PCB ink colors, improving the visual consistency of the display.
Increased Contrast: The nano-coating can be finely controlled to enhance the black level of the screen background, increasing contrast and improving display quality.
The AOB process makes up for the lack of protection performance of SMD LEDs without affecting the ecology and cost performance of the original supply chain, thus improving the display effect and maintenance convenience. The advent of AOB undoubtedly provides a better choice for indoor display solutions, which will become an important highlight of the development of LED display technology.
Difference between AOB technology and GOB technology:
Although the two technologies are similar in application methods, the resin formulations used are different. GOB technology coat a uniform layer of resin on the LED surface, protecting the entire screen surface. GOB costs much more than AOB, but provides better protection because the LED is completely covered with resin. Although AOB provides less protection, it still protects the LED to some extent. During the assembly and transportation of the display, even with AOB protection, the LED module needs to be handled with care.
Conclusión
In conclusion, AOB technology has shown significant benefits in the protection and performance improvement of LED displays. By adding polymer material films and nano-coating in the production process, AOB technology has effectively reduced the failure rate of LED lamp beads and improved the physical and chemical protection performance of the display screen. At the same time, it also improved the display effect and increased the contrast and viewing angle of the screen. These technological advances have not only improved the reliability and durability of the display screen, but have also provided the market with more high-quality indoor display solutions. In the future, with the further development and improvement of technology, AOB technology is expected to continue to play an important role in the field of LED display and promote the continuous development of the industry.