Foldable Display Holding Structure for Tensile Stress Management
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Solution Overview
Problem
Foldable display devices face issues with tensile stress when transitioning from a spread to a folded state, leading to potential separation or damage of the flexible display panel due to inadequate adhesive force and stress concentration.
Innovation Solution
A holding structure with a soft outer housing, inner housings, supporting stages, hinges, and spring elements that allow the display panel to absorb tensile stress through elastic forces, reducing the risk of separation and damage by distributing stress evenly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the flexible display panel is made foldable to enable spreading and folding states, then the adaptability and versatility of the device is improved, but tensile stress concentrates on the display panel during folding transitions, causing potential separation or damage
Solution Approach 1:
The supporting stages are designed to move relative to the inner housing during folding transitions, dynamically adjusting their position to accommodate the display panel's bending. This movement reduces stress concentration by allowing the supporting stages to follow the panel's deformation rather than resisting it rigidly
Solution Approach 2:
The spring elements are introduced as intermediary components between the supporting stages and the inner housing. These springs absorb and distribute the tensile stress generated during folding, preventing direct stress transmission to the display panel and thereby protecting it from damage while maintaining foldable functionality
2Strength
If adhesive force between the display panel and supporting stages is increased to prevent separation, then the strength of bonding is improved, but stress concentration at the adhesive interface may still damage the display panel
Solution Approach 1:
Spring elements are positioned between the supporting stages and the inner housing to act as stress-absorbing intermediaries. During folding, these springs compress and expand, absorbing tensile forces before they can concentrate at the adhesive interface between the display panel and supporting stages
Solution Approach 2:
The spring elements provide preemptive stress absorption by being pre-installed in a compressed or relaxed state that allows them to immediately cushion tensile forces during folding transitions, preventing stress concentration before it can damage the display panel
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 holding structure effectively reduces the impact of tensile stress on the flexible display panel, preventing separation and damage by utilizing elastic forces from spring elements and movable supporting stages, ensuring stable operation across different states.
Implementation Method 1
a first spring element connected to a side of the first inner housing adjacent to the first gap, and a side of the first supporting stage adjacent to the second gap
Data Source
AI summary
A foldable display device includes a holding structure and a flexible display panel. The holding structure includes a soft outer housing, a first inner housing, a second inner housing, a first supporting stage, a second supporting stage, a first hinge, a first spring element, a second hinge, and a second spring element. The first hinge is connected to a same side of the first inner housing and the first supporting stage. The first spring element is connected to another same side of the first inner housing and the first supporting stage. The second hinge is connected to a same side of the second inner housing and the second supporting stage. The second spring element is connected to another same side of the second inner housing and the second supporting stage. The flexible display panel is located on the first and second supporting stages.