Flexible Display Panel Groove Structure for Crack-Resistant Bending

The patent introduces grooves that segment the back plane into multiple regions, allowing stress to be distributed across different segments rather than concentrated in a single thin structure. This segmentation enables the thin display panel to maintain structural integrity while achieving the desired thinness.

The patent employs a flexible substrate with integrated grooves that creates a thin yet resilient structure. The grooved design in the back plane provides flexibility and bendability while maintaining sufficient strength to prevent cracks during bending operations.

The grooves segment the multiple film layers into controlled regions, preventing crack propagation across the entire structure. By dividing the back plane into segments separated by grooves, the patent reduces the continuous stress paths that would otherwise lead to fractures in bending areas.

The patent converts the potential harm of multiple film layers (which can delaminate and crack) into a benefit by introducing grooves that control stress distribution. The grooves transform the rigid multi-layer structure into a more flexible configuration that accommodates bending stresses without fracturing.

The grooves segment the back plane structure, creating discrete regions that reduce stress concentration on metal routings. This segmentation allows the thin back plane to flex without subjecting the metal routings to excessive tensile stresses that would cause fractures.

The grooves act as pre-designed stress relief features that cushion the metal routings against bending-induced stresses. By incorporating these grooves in advance during manufacturing, the patent provides protective stress distribution before the device is subjected to bending operations.