Foldable Display Functional Layer Using MXene for Thin EMI Shielding
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Solution Overview
Problem
Existing display devices face challenges in reducing thickness and improving folding characteristics, particularly in devices with active regions of various shapes.
Innovation Solution
Incorporating a display device structure that includes a display panel with non-folding and folding regions, a digitizer with coils, and a functional layer containing MXene, which is free of magnetic metal powder and copper, to enhance folding capabilities and reduce thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional functional layers containing magnetic metal powder or copper are used, then electromagnetic shielding is achieved, but device thickness increases and folding characteristics deteriorate
Solution Approach 1:
The patent changes the material composition of the functional layer from traditional magnetic metal powder or copper to MXene, which has superior electromagnetic shielding properties per unit thickness. This material substitution enables achieving the same shielding effectiveness with reduced thickness, directly resolving the contradiction between shielding reliability and device thickness.
Solution Approach 2:
The patent employs MXene as a composite material in the functional layer, combining it with other materials to create a multi-component structure that achieves effective electromagnetic shielding at reduced thickness. The composite nature of MXene-based functional layers allows optimized balance between shielding performance and thickness for foldable devices.
2Reliability
If traditional functional layers containing magnetic metal powder or copper are used, then electromagnetic shielding is achieved, but folding characteristics deteriorate
Solution Approach 1:
The patent changes the material composition from rigid traditional metals to MXene, which has flexible properties that maintain structural integrity during folding. MXene's material parameters (flexibility, tensile strength) are optimized for foldable applications, enabling the functional layer to withstand repeated folding cycles while maintaining electromagnetic shielding effectiveness.
Solution Approach 2:
The patent implements the functional layer as a flexible thin film containing MXene, which can bend and deform with the display panel during folding operations. This thin-film structure with MXene maintains flexibility and durability required for foldable devices, unlike traditional rigid metal-based functional layers.
3Reliability
If multiple separate layers are used for different functions, then each function is optimized, but device thickness and complexity increase
Solution Approach 1:
The patent designs the functional layer with MXene to perform multiple functions simultaneously: electromagnetic shielding, heat dissipation, and structural support. This multi-functional approach eliminates the need for separate dedicated layers for each function, reducing overall device complexity and thickness while maintaining all required performance characteristics.
Solution Approach 2:
The patent merges multiple functional requirements into a single integrated functional layer containing MXene, rather than using separate stacked layers for shielding, thermal management, and structural support. This consolidation reduces the number of interfaces and layers, simplifying the overall device structure while achieving comprehensive functional performance.
Data Source
AI summary
A display device includes: a display panel including a first non-folding region, a second non-folding region, and a folding region disposed between the first non-folding region and the second non-folding region; and a lower member disposed below the display panel. The lower member includes: a digitizer disposed below the display panel and including a base layer and a plurality of coils disposed on one surface of the base layer; and a functional layer disposed below the digitizer, where the functional layer contains MXene.