Flexible Display Supporting Layer Segmentation for Bending Stress
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Solution Overview
Problem
Flexible display panels, such as foldable or rollable displays, often suffer from poor display performance due to issues with stress accumulation and dislocation of supporting layers during bending, leading to potential collapse or damage.
Innovation Solution
Incorporating an isolation groove in the supporting layer of the display module, perpendicular to the bending axis, which disconnects the supporting layer on both sides of the groove and reduces stress transport to the edge, thereby minimizing dislocation and preventing collapse or damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a supporting layer is disposed on the flexible display panel to improve support performance, then the support performance is improved, but stress accumulation and dislocation occur during bending causing poor display
Solution Approach 1:
The supporting layer is segmented by introducing isolation grooves that extend through the layer in the first direction, dividing it into multiple isolated sections. This segmentation prevents stress accumulation and dislocation during bending while maintaining support performance in the active area, resolving the contradiction between support strength and display reliability
2Strength
If the supporting layer is made thicker to improve support performance, then the support performance is improved, but the flexibility and bendability of the display panel deteriorates
Solution Approach 1:
By segmenting the supporting layer through isolation grooves, the effective bending length is reduced, allowing the layer to flex more easily despite maintaining sufficient thickness for support performance. The segmented structure bends in smaller segments rather than as a single rigid unit
Solution Approach 2:
The supporting layer is designed with different properties in different regions: the active area maintains full support performance with adequate thickness, while the bending area incorporates isolation grooves to enhance flexibility. This local differentiation resolves the contradiction between support strength and flexibility
Data Source
AI summary
A display module and a display device. The display module includes: a flexible display panel (61), wherein the flexible display panel (61) includes an active area (AA) and a bending area (BB) located at a periphery of the active area (AA); a supporting layer (62) disposed on one side of the active area (AA), and the supporting layer (62) is disposed away from a light-emitting side of the flexible display panel (61); wherein, the supporting layer (62) is provided with an isolation groove (63) extending through the supporting layer (62) in a first direction, and the isolation groove (63) is disposed close to the bending area (BB) for isolating the supporting layer (62) on both sides of the isolation groove (63), and the first direction is perpendicular to a thickness direction of the supporting layer (62) and a bending axis (X) of the bending area (BB).