Foldable Display Support Layer Lattice for Repeated Bending
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Solution Overview
Problem
Display devices with foldable panels are prone to damage due to repeated folding and unfolding operations, particularly affecting the support layer that folds and unfolds with the panel.
Innovation Solution
A display device design featuring a support layer with a lattice pattern containing a plurality of holes, arranged in specific dimensions and orientations to reduce stress and enhance durability, including a metal material with specific width ranges for the holes and branches, and additional support layers to manage stress distribution during folding and unfolding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a solid support layer is used to maintain structural integrity, then strength is improved, but the support layer becomes damaged by repeated folding and unfolding operations
Solution Approach 1:
The support layer is designed with a lattice pattern containing multiple holes, creating a porous structure that allows the material to flex and deform during folding and unfolding operations. This porous configuration reduces stress concentration and prevents damage while maintaining sufficient structural support for the foldable display panel.
Solution Approach 2:
The support layer combines a lattice pattern structure with appropriate material selection to create a composite design that balances structural strength with flexibility. The lattice configuration integrated with the base material provides both the necessary support and the ability to withstand repeated mechanical stress from folding operations.
2Ease of operation
If the support layer is made flexible to accommodate folding, then ease of operation is improved, but the support layer lacks sufficient strength to maintain structural integrity
Solution Approach 1:
The support layer features a lattice pattern with varying hole distributions and branch thicknesses in different regions. Areas requiring greater flexibility have different lattice configurations compared to areas needing stronger support, allowing each local region to have optimized properties for its specific functional requirements.
Solution Approach 2:
The support layer is divided into multiple lattice cells through the pattern of holes and branches. This segmentation creates a structure that can locally deform and flex during folding while the overall network maintains structural integrity, combining flexibility with strength through distributed modular units.
Data Source
AI summary
A display device includes: a display module having a first non-foldable area, a foldable area, and a second non-foldable area, which are arranged in a first direction in a unfolded state; and a first support layer disposed under the display module and having a lattice pattern including a plurality of first holes overlapping the foldable area, wherein the first holes are arranged in the first direction and a second direction intersecting the first direction, and wherein: each of the first holes has a first width in the second direction and a second width in the first direction, the first width is in a range from about 2,000 μm to about 9,000 μm, and the second width is in a range from about 100 μm to about 250 μm.