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OPTICAL BONDING / LOCA
LOCA Optical Bonding
for Industrial Displays
LOCA optical bonding uses liquid optically clear adhesive between cover glass, touch panel and LCD to create an integrated optical stack.
Product references. Bonding stack shown schematically.
Why consider LOCA optical bonding?
LOCA replaces the air gap with a clear adhesive whose refractive index is closer to glass, reducing reflections inside the display.
More light, less reflection
Reduces internal reflection losses so more display light reaches the viewer.
Higher perceived contrast
Less reflected ambient light helps blacks look deeper and images appear clearer.
Better bright-light readability
Text and graphics are easier to read in bright surroundings.
Results depend on the optical stack, adhesive and cover-surface treatment.
Before selecting LOCA optical bonding, provide the layer drawings, bonding area, cover treatment and intended viewing conditions. Review adhesive compatibility and curing access for the proposed stack. The material choice and bond-line requirements must suit the agreed assembly; the process name alone does not define the finished display performance.
The LOCA optical bonding process
Dispensing → Lamination → Leveling / Debubbling → UV Curing
01 / LOCA DISPENSING
A controlled start to the optical bond
Apply liquid optical adhesive to the bonding surface. The dispense pattern and volume are matched to the panel and bonding area.
02 / COVER GLASS / TOUCH LAMINATION
Align the layers.
Bring them together.
Align the cover glass and touch panel, then bring the surfaces together to spread the adhesive across the bonding interface.
03 / LEVELING / DEBUBBLING
An even layer, with fewer trapped bubbles
Allow the adhesive to level and carry out the debubbling stage to reduce trapped air before curing.
04 / UV CURING
Cure the adhesive.
Secure the bond.
UV exposure cures the liquid adhesive into a transparent bonding layer. Curing conditions are matched to the adhesive and product structure.
Let’s discuss your optical stack.
Share your display size, layer structure and application requirements. For a film adhesive process, explore Incollaggio ottico OCA.
Define alignment, visible-area inspection and any functional checks before production. Record how bubbles, contamination and edge appearance will be assessed under agreed viewing conditions. Coordinate those criteria with garanzia della qualità and the HMI test plan. Numerical limits and environmental tests remain project-specific.