LED screen technology continues to advance, with pixel densities decreasing dramatically, making individual LEDs so small that they are difficult to see with the naked eye. With such high pixel densities, it becomes essential to implement systems that protect and enhance the durability of the LEDs. AOB (Admixture On Board) is one such solution that provides additional resistance and improves the handling of LED panels.

AOB Technology (Admixture On Board)

AOB stands for "Admixture On Board," which refers to an adhesive resin applied to strengthen the bond between the LED and the PCB (Printed Circuit Board). This resin layer does not interfere with the display quality and adds protection to the LEDs, ensuring greater durability.

Key Features of AOB:

 -  Improved Impact Resistance:The application of AOB resin enhances the connection between the LED and PCB, making it six times more resistant to damage. This protection reduces the risk of scratches, impacts, and abrasions that may occur during handling, installation, or use.
 
 -  Enhanced Sealing:AOB protects the soldering points of the LED modules from water and dust, improving the front sealing and making the modules more durable in harsh environments.
 
 -  Supports Smaller Pixels and Wider Viewing Angles:AOB technology allows for the use of smaller LEDs with improved viewing angles, making it suitable for high-density displays.
 
 -  Improved Color Consistency and Contrast:By applying resin to the sides and soldering legs of the LEDs, AOB slightly enhances the color consistency and contrast, providing a clearer and more vibrant display.
 
 -  Reduced Defect Rate:The increased durability of the joints with AOB resin helps reduce defects during manufacturing, ensuring more reliable LED modules.

Application of AOB Resin

AOB is applied as the final step in the SMD (Surface Mount Device) process during electronic board manufacturing. After the components are placed and soldered, the LED module undergoes a 72-hour performance testing phase to ensure good color balance and uniformity. Any defects are corrected before the resin is applied.
 
Once the module passes the performance tests, a layer of polymer resin is applied to reinforce the LEDs' connection to the PCB and offer extra protection. The resin builds up between the LEDs, ensuring they remain securely attached to the board.

Visual Impact of AOB

When viewing an AOB-protected module, you will notice a matte, translucent black resin layer between the LEDs and the PCB. This resin layer enhances the display’s contrast and reflectivity, providing improved visual performance. The matte black effect increases the contrast of the display, similar to using black-front SMD LEDs. Additionally, the resin's reflectivity improves the screen's viewing angles by reducing color consistency loss when viewed from wide angles.

Conclusion

AOB technology is an excellent choice for protecting LED displays, particularly for modules with smaller pixels. It provides reliable protection against impacts, scratches, and environmental factors without significantly affecting the quality of the display. By enhancing durability and color consistency, AOB technology contributes to better long-term performance and a more robust display. For smaller pixel modules, such as those with P2.5 or smaller, AOB is highly recommended to ensure your investment is protected while keeping costs manageable.

If you need more information or would like assistance with choosing the right protection for your project, feel free to contact us for customized solutions.