Fluid-Filled Flexible Display Support Structure for Wrinkle-Free Bending
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Solution Overview
Problem
Flexible display modules suffer from unrecoverable wrinkles and film debonding due to poor coordination between the support structure and the display panel during bending, primarily caused by the high elastic modulus of the steel plate support layer and the adhesive layer, leading to reduced usage effect and service life.
Innovation Solution
A display module design featuring a support structure with a first and second encapsulation layer, support plates arranged at intervals, and an accommodation space filled with a lubricating fluid material in the bending region, along with an elastic sheet between support plates to reduce friction and enhance deformation coordination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a steel plate support layer is used to provide supporting and restoring function, then the structural strength is improved, but the coordination with adhesive layer deformation deteriorates due to high elastic modulus
Solution Approach 1:
The steel plate support layer is segmented into multiple support plates arranged at intervals rather than a continuous plate. This segmentation reduces the overall elastic modulus of the support structure while maintaining local strength where needed, allowing better coordination with the adhesive layer's deformation during bending without causing unrecoverable wrinkles or debonding
Solution Approach 2:
The support structure transitions from uniform steel plate to a non-uniform structure with support plates at specific intervals and an elastic sheet in the bending region. This creates local differences in mechanical properties - rigid support where needed and flexible coordination in the bending region - resolving the contradiction between strength and deformation coordination
2Adaptability or versatility
If multiple times of bending and flattening are performed, then the flexibility and adaptability are improved, but unrecoverable wave-shaped wrinkles or debonding occur due to poor coordination
Solution Approach 1:
An elastic sheet is introduced as an intermediary component between the support plates and the display panel in the bending region. This elastic sheet acts as a mediator that can deform with the bending motion while maintaining coordination between the rigid support structure and the display panel, preventing wrinkle formation and debonding during repeated bending cycles
Solution Approach 2:
The support structure becomes a composite system combining rigid support plates (for strength) with a flexible elastic sheet (for deformation coordination). This composite structure enables both bending flexibility and reliable restoration to the original flat state by allowing the elastic sheet to accommodate reversible deformation
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively reduces shear stress and friction between the support structure and the display panel, preventing unrecoverable wrinkles and film debonding, thereby improving the bending performance and extending the service life of the display module.
Implementation Method 1
a fluid material is arranged in the accommodation space, and the fluid material is a lubricating material
Data Source
AI summary
A display module is provided, which includes a display panel and a support structure. The display panel includes a bending region, and the support structure includes a first encapsulation layer, support plates, and a second encapsulation layer sequentially disposed on the display panel. An accommodation space is defined among the first encapsulation layer, the support plates, and the second encapsulation layer, the accommodation space is positioned corresponding to the bending region, and a fluid material is arranged in the accommodation space.