Foldable Display Reinforcing Structure for Unfolded Flatness
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Solution Overview
Problem
Display devices with foldable panels can provide distorted images when a folded area is visible, due to the varying flatness of the display panel.
Innovation Solution
A display device with a foldable display panel featuring a reinforcing member composed of multiple layers, including a first and second reinforcing member layer with open areas and an auxiliary layer, supported by a cushion layer and digitizer, to maintain a flat surface while unfolded.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a foldable display panel is used to enable folding functionality, then adaptability is improved, but the display flatness deteriorates when unfolded
Solution Approach 1:
The reinforcing member is constructed with nested layers where the second reinforcing member layer is inserted into the first reinforcing member layer or at least partially surrounds it. This nested structure provides enhanced structural support to maintain display flatness while preserving foldable functionality.
Solution Approach 2:
The reinforcing member comprises multiple layers with different material properties - one layer includes metal, glass reinforced fiber, or carbon reinforced fiber for structural strength, while the other layer includes silicon-based polymer, urethane-based polymer, aramid-based polymer, or elastomer for flexibility. This composite structure balances rigidity and flexibility to maintain flatness while enabling folding.
2Device complexity
If a single-layer reinforcing member is used to support the display panel, then device complexity is reduced, but structural support effectiveness deteriorates
Solution Approach 1:
The second reinforcing member layer is inserted into the first reinforcing member layer or at least partially surrounds it, creating a nested configuration that enhances structural support effectiveness while maintaining relatively simple overall device architecture.
Solution Approach 2:
The reinforcing member transitions from a single-layer two-dimensional structure to a multi-layer three-dimensional nested structure, adding structural depth and complexity that significantly enhances support effectiveness for maintaining display flatness.
Data Source
AI summary
A display device includes a foldable display panel, a reinforcing member disposed in one surface of the display panel and that supports an entire surface of the display panel, and a a cushion layer disposed in one surface of the reinforcing member. The reinforcing member includes a first reinforcing member layer and a second reinforcing member layer that is inserted into the first reinforcing member layer or at least partially surrounds the first reinforcing member layer, and one of the first reinforcing member layer or the second reinforcing member layer has an open area that is at least partially open.