Foldable Display Misalignment Compensation via Elastic Fiber
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Solution Overview
Problem
Current foldable display devices face challenges in maintaining durability and display quality due to misalignment issues between support plates and misalignment compensation members, which affect the surface flatness and image quality when folded or unfolded.
Innovation Solution
Incorporating a misalignment compensation member with an elastic fiber, supported by rigid support plates and frames, to compensate for misalignments and maintain surface quality by using adhesive members to secure these components, ensuring the display module's durability and image quality across folding and non-folding regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a foldable display module is used to enable flexible folding, then portability and user convenience are improved, but misalignment between support plates and display surfaces occurs, degrading display quality and surface flatness
Solution Approach 1:
A misalignment compensation member is introduced as an intermediary component between the support plate and the display module. This member includes a bending compensation portion that can deform elastically to absorb misalignment between the folding region and non-folding region, and a filling portion that fills gaps to maintain surface flatness. This intermediary structure resolves the alignment precision issue while preserving folding capability.
Solution Approach 2:
The misalignment compensation member is designed with specific material properties (elastic modulus, density) and geometric parameters (thickness of 30-300 μm, bending compensation portion shape) to optimize its ability to compensate for misalignment. By carefully controlling these parameters, the member can effectively absorb misalignment while maintaining structural integrity and display quality.
2Strength
If support plates are made rigid to maintain structural stability, then durability is improved, but misalignment between the folding region and non-folding region increases, affecting surface flatness
Solution Approach 1:
The support structure is segmented into multiple components: rigid support plates for structural stability, and a separate misalignment compensation member for maintaining surface flatness. The support plate provides rigidity and strength, while the compensation member (with bending compensation portion and filling portion) addresses surface flatness by deforming to accommodate the folding geometry.
Solution Approach 2:
The misalignment compensation member uses composite construction with a bending compensation portion made of elastic material and a filling portion made of gap-filling material. This composite approach allows different regions of the same component to serve different functions: the bending portion maintains flexibility to absorb misalignment, while the filling portion ensures surface flatness by filling voids.
3Stability of the object's composition
If adhesive members are used to secure components, then assembly stability is improved, but manufacturing complexity increases due to additional bonding steps
Solution Approach 1:
Adhesive members are introduced as intermediary bonding elements between the misalignment compensation member and the support plate, and between the misalignment compensation member and the display module. These adhesives provide stable bonding while allowing for controlled application during assembly, balancing assembly stability with manufacturing feasibility.
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 enhances the durability and display quality of foldable display devices by effectively compensating for misalignments, maintaining a flat surface and improving image quality, even when the device is folded or unfolded, through the use of a high-density, high-elasticity fiber and adhesive members.
Implementation Method 1
a misalignment compensation member including an elastic fiber
Data Source
AI summary
A display device includes a display module which displays an image, the display module including: a folding region at which the display module is foldable and unfoldable, and a first non-folding region and a second non-folding region facing each other along a first direction with the folding region therebetween; a misalignment compensation member including an elastic fiber; a first support plate facing the first non-folding region of the display module with the misalignment compensation member therebetween; and a second support plate separated from the first support plate along the first direction and facing the second non-folding region of the display module with the misalignment compensation member therebetween.