Lenticular Sheet Adhesion via Pre-Stretch Coating

The patent applies preliminary action by forming the ink receiving layer on the transparent resin substrate before stretching the substrate. This sequence ensures that the ink receiving layer is properly adhered to the substrate in its unstretched state, preventing adhesion problems that would occur if the layer were formed after stretching. The ink receiving layer is prepared in advance on the flat substrate, ensuring reliable bonding before the substrate undergoes dimensional changes.

The patent utilizes parameter changes by controlling the stretching process parameters - specifically stretching the substrate in a direction perpendicular to the lenticular lens arrangement. By carefully controlling the stretching ratio and direction, the patent maintains adhesion between layers while achieving the desired optical effects for stereoscopic display. The parameter control ensures that stress is distributed in a way that preserves layer bonding.

The patent applies local quality by creating different functional zones with distinct properties. The ink receiving layer is positioned specifically on the substrate with controlled local adhesion characteristics. The lenticular lens layer is arranged in a specific orientation perpendicular to the stretching direction, creating localized optical effects while maintaining overall structural integrity. This spatial differentiation allows viewing angle enhancement without compromising layer adhesion.

The patent resolves the contradiction by introducing dimensional consideration - stretching the substrate in a direction perpendicular to the lenticular lens arrangement. This orthogonal relationship creates a geometric configuration where stretching enhances viewing angle performance in one dimension while the perpendicular lens arrangement maintains adhesion in another dimension. The dimensional separation of functions allows both requirements to be satisfied simultaneously.