Support Member Joint Recesses for Foldable Display Adhesion Control
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Solution Overview
Problem
Foldable display devices face challenges in maintaining the integrity of the folding region, as existing designs can lead to deformation due to unintentional attachment of adhesive members, which can cause the display module to be pulled downward when folded and unfolded.
Innovation Solution
The implementation of a support member system with specific joint units and hinge members that include recesses and asymmetric shapes to prevent adhesive attachment to unintended areas, ensuring the folding region remains intact during folding and unfolding operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If adhesive members are used to attach the display module to the support member, then the display module is securely fixed, but the adhesive may unintentionally attach to unintended areas causing deformation of the folding region
Solution Approach 1:
The support member features asymmetric joint units with designated attachment areas that have different surface properties. Specific regions are designed to be adhesive-friendly while other regions are adhesive-resistant, creating local quality variations that control where the adhesive member attaches. This ensures strong attachment at intended locations while preventing unwanted attachment that would deform the folding region.
Solution Approach 2:
The joint unit is divided into multiple distinct regions: a first region designed for adhesive attachment and a second region that is adhesive-resistant. This segmentation allows the adhesive member to be confined to specific areas, preventing it from spreading to the folding region and causing deformation while maintaining secure attachment where needed.
2Ease of manufacture
If the support member structure is simplified, then manufacturing is easier, but the ability to prevent adhesive deformation is reduced
Solution Approach 1:
The joint unit employs an asymmetric design where one side features a first region optimized for adhesive attachment and the other side features a second region that is adhesive-resistant. This asymmetric configuration achieves reliable prevention of adhesive deformation without requiring complex additional components, maintaining ease of manufacture while ensuring folding region stability.
Data Source
AI summary
A display device includes first and second support members arranged along a first direction, a joint part therebetween, a hinge member adjacent to facing sides of the first and second support members that extends in a second direction crossing the first direction, and that includes two rotation axes, and a flexible display module on the first and second support members and the joint part. The joint part includes a first joint unit that extends in the second direction and a plurality of second joint units arranged in the first direction, where the first joint unit is interposed between the plurality of second joint units. The second joint units extend in the second direction, and each of the second joint units has recesses between side and top surfaces thereof and that extend in the second direction.