Flexible Display Insulating Layer Chamfered Engraved Patterns

The insulating layer is divided into multiple segments through engraved patterns (first, second, and third patterns) that create separated regions. These segmented structures prevent crack propagation by interrupting continuous stress paths, allowing the display to bend without developing catastrophic cracks while maintaining the necessary flexibility for folding applications

Different regions of the insulating layer are given different structural qualities through selectively applied engraved patterns. The bending region receives specific pattern configurations (including curved portions and varying densities) that locally enhance crack resistance, while other regions maintain their original structure, thus providing targeted protection where it is most needed without compromising overall flexibility

The harmful interaction between the rigid cover window and the flexible display is addressed by extracting or removing material from the insulating layer to create engraved patterns. These patterns reduce the contact area and stress concentration points between the cover window and the underlying structures, thereby eliminating the crack-generating interference while preserving the cover window's protective function

The structural parameters of the insulating layer are changed by introducing engraved patterns with specific geometries, depths, and distributions. These parameter changes modify the mechanical properties of the insulating layer in the bending region, reducing stress concentration and preventing crack initiation from external interference while maintaining adequate mechanical protection