Foldable Display Panel Shock Absorber Segmentation
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Solution Overview
Problem
Foldable displays face a tradeoff between impact resistance and foldability due to the conflicting requirements of a thin, low-stiffness cover window and a high-stiffness shock absorber, which can lead to damage or failure during deformation.
Innovation Solution
A shock-absorbing display panel design with discontinuities in the shock absorber and adhesive layer, allowing for reduced stress and improved folding performance by creating air gaps and varying adhesive thickness, while maintaining robustness against impacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a high stiffness shock absorber layer is used to improve impact resistance, then impact resistance is improved, but the display cannot deform properly during folding leading to shock absorber failure or layer delamination
Solution Approach 1:
The shock absorber is divided into multiple layers with different stiffness characteristics. A first shock absorber layer provides initial impact absorption, while a second shock absorber layer with different mechanical properties provides additional protection. This segmentation allows the shock absorber to accommodate both impact resistance and folding deformation requirements.
Solution Approach 2:
Different regions of the shock absorber are designed with different mechanical properties. The first and second shock absorber layers have different stiffness, strength, and elasticity characteristics tailored to their specific functions. This local differentiation enables the shock absorber to provide high stiffness where needed for impact resistance while maintaining flexibility where needed for folding.
2Adaptability or versatility
If a thin cover window with low stiffness is used to enable folding, then foldability is improved, but impact resistance deteriorates due to large deformations during impact
Solution Approach 1:
The display structure uses a composite configuration combining a thin cover window layer with multiple shock absorber layers. The cover window provides flexibility for folding, while the multi-layer shock absorber structure provides impact resistance. This composite approach allows the system to achieve both foldability and impact resistance simultaneously.
3Adaptability or versatility
If the shock absorber is made thinner to reduce stress during folding, then foldability is improved, but impact resistance deteriorates
Solution Approach 1:
The shock absorber function is segmented across multiple layers rather than relying on a single thick layer. The first shock absorber layer handles initial impact and deformation, while the second shock absorber layer provides additional protection. This segmentation allows thinner individual layers to collectively provide the same protection as a single thick layer, reducing stress during folding while maintaining impact resistance.
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 design reduces stress on the display layers during folding and enhances impact resistance by minimizing the interaction between the shock absorber and display panel, preventing delamination and failure, and allowing for flexible folding without compromising robustness.
Implementation Method 1
The adhesive layer is disposed between the shock absorber and the non-viewing surface
Implementation Method 2
the shock absorber configured to reduce the stress on the display panel in response to an impact
Data Source
AI summary
A shock-absorbing display panel apparatus for folding flat screen displays, the shock-absorbing apparatus includes a planar display layer comprising a viewing surface and an opposing non-viewing surface, the display layer further comprising at least one folding region and at least one non-folding region for folding along at least one axis of rotation; a shock absorber in co-planar peripheral contour with the display layer, the shock absorber having at least one first discontinuity sub-dividing the shock absorber into physically separate regions; an adhesive layer disposed between the shock absorber and the non-viewing surface; and wherein the adhesive layer has at least one second discontinuity between the shock absorber and the display panel in the at least one folding region of the display layer.