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Liquid Optically Clear Adhesive Bonding

Liquid optically clear adhesive (LOCA) bonding is a specific type of optical bonding technique used to join display components together. It involves the application of a special optically clear adhesive between the display panel and the cover glass or touch sensor layer. The adhesive is in liquid form during the bonding process and cures or solidifies afterward.
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  • LOCA bonding technology

  • Reshine Display

What is Liquid optically clear adhesive bonding?

Liquid optically clear adhesive (LOCA) bonding is a specific type of optical bonding technique used to join display components together. It involves the application of a special optically clear adhesive between the display panel and the cover glass or touch sensor layer. The adhesive is in liquid form during the bonding process and cures or solidifies afterward.



The benefits of LOCA bonding include:

l Optical Clarity: LOCA adhesives are designed to have excellent transparency, ensuring minimal impact on the optical properties of the display. They have a high refractive index, closely matching that of glass, which helps reduce reflections and increase contrast, resulting in improved visual quality.


l Bond Strength: LOCA adhesives create a strong bond between the display panel and the cover glass or touch sensor layer. This enhances the overall durability and mechanical strength of the display assembly, making it more resistant to impact, vibrations, and environmental stresses.


l Elimination of Air Gap: Like other optical bonding methods, LOCA bonding eliminates the air gap between the layers, minimizing internal reflections and increasing the amount of light that reaches the viewer's eyes. This leads to improved readability, especially in bright ambient conditions.


l Touch Sensitivity: LOCA bonding can enhance touch sensitivity and accuracy by reducing the parallax effect, which is the misalignment between the touch input and the actual display content. With a reduced air gap and tighter alignment, LOCA bonding ensures more precise touch response and a better user experience.


l Moisture Resistance: The adhesive used in LOCA bonding can provide a moisture barrier, helping to prevent the ingress of water or moisture into the display assembly. This is particularly beneficial in outdoor or high-humidity environments where moisture can damage the internal components and cause fogging or image distortion.


l Easy Repairability: LOCA bonding allows for relatively easier repair or replacement of components compared to some other bond.








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