Foldable Display Elastic Member With One-Sided Stress-Relief Grooves
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Solution Overview
Problem
Existing flexible or foldable display devices face issues with substrate reliability and thickness due to repeated folding, leading to cracks and increased thickness, which affects visibility and folding size.
Innovation Solution
A display device with an elastic member featuring grooves on one surface and a panel on the opposite surface, eliminating the need for additional layers to disperse stress and reduce thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If grooves are formed in the substrate for display to disperse stress, then reliability is improved, but an additional layer is required to prevent pattern transfer, increasing thickness
Solution Approach 1:
The grooves are formed only on one surface of the substrate rather than through the entire thickness, creating a dimensional distinction between the folded surface (with grooves) and the opposite surface (without grooves). This allows the display panel to be disposed on the smooth surface, preventing pattern transfer while maintaining stress dispersion functionality on the folded surface.
Solution Approach 2:
The substrate surface is segmented into two distinct surfaces: one surface with grooves for stress dispersion in the folding region, and the other surface without grooves for display panel attachment. This segmentation allows each surface to serve its specific function without compromising the other.
2Illumination intensity
If additional layers are disposed between the substrate and display panel to prevent pattern transfer, then visibility is improved, but device complexity and thickness increase
Solution Approach 1:
Instead of adding layers in the vertical dimension to prevent pattern transfer, the solution uses surface-dimensional segmentation where grooves are formed only on one surface. This eliminates the need for additional protective layers, reducing structural complexity while maintaining display visibility.
3Temperature
If additional heat dissipation layers are disposed between the substrate and display panel, then heat dissipation is improved, but thickness increases
Solution Approach 1:
The substrate serves multiple functions simultaneously: it provides structural support, disperses stress through grooves on one surface, and acts as a heat dissipation layer through its inherent thermal conductivity. By eliminating the need for separate heat dissipation layers, the device thickness is reduced while maintaining effective heat dissipation.
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
Improves visibility by preventing pattern transfer and reduces thickness, weight, and enhances folding characteristics by eliminating the need for additional heat dissipation layers.
Implementation Method 1
it is possible to prevent such cracks by forming grooves for dispersing stress in the substrate for display
Implementation Method 2
the panel is disposed on the other surface of the elastic member through an adhesive layer
Data Source
AI summary
A display device according to an embodiment comprises: an elastic member; and at least one panel from among a display panel and a touch panel which are arranged on the elastic member, wherein the elastic member includes one surface and the other surface opposite to the one surface, the elastic member includes a first area and a second area, the first area is defined as a folding area, the second area is defined as an unfolding area, the elastic member has a plurality of first grooves arranged on the one surface in the first area thereof, and the panel is arranged on the other surface of the elastic member via an adhesive layer.