Application and Advantages of AOB Technology in LED Screen

With the wide application of LED screen in various fields, how to improve the protection performance of LED display, reduce the failure rate and improve the display effect has become a hot topic in the industry. Although the traditional SMT (surface mount technology) technology has been very mature, but in some special application environments, often encountered does not light, column lights, dead lights and so on. To solve these problems, the emergence of AOB technology provides a new solution.

What is AOB technology?

AOB literally means “Adhesive-On-Board-Blend” and refers to adhesive resin, AOB technology provides additional protection for LED beads by coating a film of polymer material on the surface of the board after the SMT process is completed during the production of the LED display.

Main advantages of AOB technology

Physical protection properties:
AOB’s underfill has adhesive properties similar to solder paste and is also an insulating material. This filler wraps around the bottom of the LED as a whole, increasing the contact between the LED and the bottom of the PCB, improving impact resistance and durability.PCB contact ability, through the laboratory test, the side push strength of conventional SMT soldering is 1kg, the side push strength of AOB products is 6kg, which can solve the problem of bumping during the installation process, and even the light board can’t be repaired due to the spacer falling off.

Chemical protection:
AOB’s chemical protection feature is achieved through nanoscale coating technology. This matte transparent protective layer completely isolates the LED from the outside world, preventing water vapor and dust from entering the particles and improving scratch resistance.

Increased viewing angle:
The matte transparent protective layer is equivalent to adding a lens in front of the LED, increasing the angle of illumination of the LED bead, increasing the angle of illumination of the LED bead from 140° to 170°.
Light Mixing Characteristics:
AOB is equivalent to adding a piece of transparent glass to SMD LEDs, after reflection and refraction, the granularity of light is greatly reduced, reducing the moire effect and improving light mixing characteristics.
Black screen consistency:
AOB technology effectively solves the problem of PCB ink color inconsistency through coating thickness and color control, without loss of viewing angle, perfectly solves the problem of sharing PCB light panels in different batches, and improves shipping efficiency.
Contrast increase:
Nanoscale coating realizes the fine control and controllable material composition, increases the blackness of the LED display background and improves the contrast.

Comparison between AOB technology and GOB technology

In the LED screen field, AOB (Admixture On Board) technology and GOB (Glue On Board) technology are both advanced technologies used to improve the reliability and durability of displays. Although their application methods are somewhat similar, they are very different in terms of process, effect, cost and application scenarios.

Difference in process: GOB (Gel On Board) is to completely coat the surface of the LED light board with a uniform resin layer to form an overall package. AOB (On Board Blending) is to coat a polymer material film on the surface of the LED light board after the SMT process is completed.

Conclusion

The creation of AOB technology marks an important step in technological innovation and product upgrading in the LED display industry, providing an effective solution to the shortcomings of traditional displays in complex application environments. With the continuous improvement and promotion of AOB technology, the application fields of LED display will be further expanded, and the display effect and service life will be significantly improved.