Foldable Display Rigid Plate and Leveler Stress Management
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Solution Overview
Problem
Display devices face deterioration in display quality when switched between folded and unfolded states due to deformation and uneven light reflection characteristics in foldable and non-foldable regions.
Innovation Solution
A display device design incorporating first and second rigid plates, coupling layers, and levelers to maintain uniformity and prevent deformation, ensuring consistent display quality by spacing levelers apart and using anti-fouling coatings and adhesive films to manage stress and light reflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the display device is made foldable to provide a large screen, then the display area is increased, but the display panel deforms and light reflection becomes uneven when switched between folded and unfolded states
Solution Approach 1:
The support structure is divided into multiple rigid plates (first rigid plate, second rigid plate, third rigid plate, fourth rigid plate) positioned at different locations on the display panel. Each rigid plate provides localized support to prevent deformation in its respective region, allowing the entire foldable display to maintain uniformity while enabling large screen area through folding.
2Stability of the object's composition
If rigid plates are added to prevent deformation, then display panel stability is improved, but device complexity increases
Solution Approach 1:
The rigid plates serve multiple functions simultaneously: they provide structural support to prevent display panel deformation, maintain uniform light reflection characteristics, and enable the foldable mechanism to work properly. The coupling layers also serve dual purposes by both adhering the rigid plates to the display panel and providing stress distribution. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity.
3Strength
If coupling layers are used to attach rigid plates, then display panel support is improved, but stress concentration may occur at attachment points
Solution Approach 1:
The coupling layers are designed with specific thickness parameters (first thickness for coupling between display panel and rigid plate, second thickness for coupling between rigid plate and back cover) to optimize both attachment strength and stress distribution. By carefully controlling these thickness parameters, the coupling layers can provide sufficient bonding strength while distributing mechanical stress evenly across the attachment interface, preventing stress concentration that would lead to failure.
Data Source
AI summary
A display device includes: a display panel including first and second regions and a middle region between the first and second regions; a first rigid plate overlapping with the first region of the display panel; a second rigid plate overlapping with the second region of the display panel; a first coupling layer arranged between the display panel and the first rigid plate to be coupled with the first rigid plate and the first region of the display panel; a second coupling layer arranged between the display panel and the second rigid plate to be coupled with the second rigid plate and the second region of the display panel; and a first leveler between the middle region of the display panel and the first rigid plate and attached to the first rigid plate.