UV Cured Resin Layer for Image Display Adhesion

The patent divides the curing process into two separate stages: a first curing process that achieves partial curing with initial adhesion, and a second curing process that completes the curing after bonding. This segmentation allows the resin to cure in controlled steps, preventing excessive shrinkage from occurring all at once and causing image distortion, while still achieving the required adhesive strength through the complete curing process.

The patent applies a preliminary action by performing the first curing process before the final bonding step. The resin composition is partially cured to establish initial adhesion and prevent resin removal, then the complete bonding is performed, followed by a second curing process to achieve full strength. This preliminary curing action ensures the resin remains in place while allowing controlled shrinkage that doesn't distort the image.

The patent segments the curing process into two stages to overcome the light-blocking effect of the light-shielding layer. The first curing process applies UV irradiation to achieve partial curing and initial adhesion. The second curing process completes the curing after the cover member is bonded to the image display member. This segmentation ensures that even with the light-shielding layer present, sufficient curing occurs to prevent delamination and moisture entry while maintaining high image quality.

The patent applies partial curing action in the first curing process, achieving enough adhesion to prevent resin removal and delamination, even if complete curing is not yet achieved. The second curing process then completes the curing. This partial action approach ensures reliable bonding and prevents moisture entry, while the light-shielding layer remains intact for optimal image quality.

The patent extracts the thermal polymerization initiator from the resin composition, using only a photo-curable resin composition without thermal initiators. The curing is achieved entirely through UV irradiation in two stages. This extraction maintains the preservation stability of the resin composition during storage and transport, while still achieving complete curing through the optimized two-stage photopolymerization process.

The patent substitutes the thermal curing mechanism with a photopolymerization mechanism. Instead of using heat and thermal initiators to cure the resin, the patent uses UV light irradiation in two stages. This substitution eliminates the need for thermal initiators, maintaining resin stability, while achieving complete curing through the controlled photopolymerization process that adapts to the light-shielding layer configuration.