Foldable Display Screen Layer Weave Pattern for Separation Space Protection
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Solution Overview
Problem
Foldable display devices face challenges in maintaining reliability due to vulnerability to foreign substances and damage from repeated folding and unfolding, particularly at the separation spaces between components.
Innovation Solution
A foldable display device design featuring a screen layer with a weave pattern of steel and synthetic fibers, covered by thermoplastic polyurethane elastomer coatings, which overlaps the separation space between upper plates, preventing foreign substances and enhancing durability by distributing stress evenly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display device is designed with separation spaces between upper plates to enable folding, then portability and space utilization are improved, but the device becomes vulnerable to foreign substances and damage at the separation spaces
Solution Approach 1:
The patent applies a flexible screen layer made of woven fibers (steel and synthetic) covered with thermoplastic polyurethane elastomer coatings to seal the separation space between upper plates. This thin film structure prevents foreign substance entry while accommodating the folding motion, resolving the contradiction between enabling folding and preventing damage.
Solution Approach 2:
The screen layer combines multiple materials: steel fibers for strength, synthetic fibers for elasticity, and thermoplastic polyurethane elastomer coatings for protection and flexibility. This composite structure provides both mechanical strength and flexibility, allowing the device to fold while resisting foreign substances and damage.
2Object-affected harmful factors
If the screen layer uses only strong materials, then resistance to foreign substances is improved, but flexibility and ability to withstand repeated folding deteriorates
Solution Approach 1:
The screen layer uses a composite structure where steel fibers provide strength against foreign substances, while synthetic fibers provide elasticity for repeated folding. The thermoplastic polyurethane elastomer coatings bind these materials together and provide additional flexibility and protection, enabling the layer to withstand both foreign substance intrusion and repeated folding cycles.
Solution Approach 2:
The patent changes the physical parameters of the screen layer by using thermoplastic polyurethane elastomer coatings with specific glass transition temperatures and molecular weights. These parameter changes optimize the balance between strength and flexibility, allowing the screen layer to resist foreign substances while accommodating repeated folding without degradation.
3Object-affected harmful factors
If the screen layer is made thicker to prevent damage, then protection against foreign substances is improved, but flexibility and smooth folding operation deteriorates
Solution Approach 1:
The patent uses a thin film structure for the screen layer rather than a thick barrier. The thermoplastic polyurethane elastomer coatings provide sufficient protection against foreign substances while maintaining extreme flexibility. The woven fiber structure allows the thin film to bend and fold smoothly without creating resistance or interfering with the folding operation.
Solution Approach 2:
The composite structure of woven fibers with elastomer coatings creates a thin yet protective barrier. The elastomer coatings provide the necessary thickness for protection while the woven fiber architecture maintains flexibility, allowing the screen layer to be both protective and compliant with the folding motion.
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 design significantly improves the reliability of foldable display devices by preventing damage from foreign substances and external impacts, ensuring smooth folding and unfolding operations while maintaining display quality.
Implementation Method 1
Each of the upper coating layer and the lower coating layer may include a thermoplastic polyurethane elastomer
Implementation Method 2
the lower coating layer covering a lower portion of the first lines and the second lines
Data Source
AI summary
A display device includes a display panel including a first non-folding area, a second non-folding area, and a folding area, a first upper plate disposed under the display panel and overlapping the first non-folding area, a second upper plate disposed under the display panel, overlapping the second non-folding area, arranged to be spaced apart from the first upper plate, a separation space being disposed therebetween and overlapping at least a portion of the folding area in an unfolded state, and a screen layer disposed under the first upper plate and the second upper plate. The screen layer includes first lines, second lines arranged in a weave pattern with the first lines, and a lower coating layer covering a lower portion of the first lines and the second lines and overlaps the separation space.