What is Optical Bonding ?
Optical bonding is the process of laminating touchscreens, glass or plastic cover lenses, EMI filters, and other display enhancements to an LCD. A layer of adhesive is integrated between the cover layer and display to fill the air gap left behind in a typical perimeter or gasket bond. Once the adhesive is cured, the final product has better optical and ruggedization properties.
Reduced Reflections – Surface reflections can be a minor nuisance to a safety hazard depending on the application. When operating any vehicle, watercraft, or aircraft instrument panels and navigation displays must be glare free and easy to read. Environments with high ambient lighting can cause internal and external reflections that impair the visual quality of the screen. External light reflections decrease with anti-glare and anti-reflective top surface enhancements without additional power consumption. Air gaps cause internal reflections between the display and touch panel. Optical bonding fills the gap and eliminates the inner light reflection.
Dust, Moisture, and Condensation – Air gaps are also susceptible to contaminants such as dirt, dust, moisture, and condensation. Chances of environmental contamination increase in rugged-use instrumentation such as agricultural equipment or military devices. Presence of contaminants increases the risk of failure in the adhesive tape or other material used in the perimeter bond. Optical bonding eliminates the potential of contamination and condensation, protecting and extending product life.