Composite Support Layer for Lightweight EMI-Shielded Display Modules
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Solution Overview
Problem
Existing OLED display devices face issues with heavy support layers that are difficult to shield against electromagnetic interference, leading to display abnormalities and increased weight.
Innovation Solution
A display module with a support layer composed of a composite material, including a resin matrix and fiber material, which is lighter than traditional stainless steel, and optionally doped with electromagnetic shielding materials, providing enhanced shielding and stress buffering capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If stainless steel or nickel-plated stainless steel plates are used as flexible support layers, then electromagnetic shielding ability is improved, but weight increases
Solution Approach 1:
The patent uses composite material layers combining resin matrices with electromagnetic shielding materials (metal powders, conductive fillers) to create support layers that provide both electromagnetic shielding and mechanical support with reduced weight compared to solid metal plates
Solution Approach 2:
The patent modifies the composition and structure of the support layer by changing material parameters - using composite materials with specific ratios of resin to conductive filler, adjusting particle size distribution, and optimizing layer thickness to achieve optimal balance between shielding effectiveness and weight reduction
2Strength
If stainless steel plates are used as support layers, then structural strength is maintained, but weight increases
Solution Approach 1:
The composite support layer combines resin matrices (providing flexibility and base strength) with reinforcement materials (glass fibers, carbon fibers, or metal meshes) to achieve structural strength comparable to metal plates while significantly reducing weight
Solution Approach 2:
The patent applies different material compositions and fiber orientations in different regions of the support layer to optimize strength where needed while minimizing material usage elsewhere, achieving weight reduction without compromising overall structural integrity
3Weight of moving object
If composite material layers are used as support layers, then weight is reduced, but electromagnetic shielding ability may be insufficient
Solution Approach 1:
The patent incorporates electromagnetic shielding materials (metal powders such as nickel, copper, or aluminum; conductive carbon materials; or ferromagnetic particles) directly into the composite resin matrix to provide intrinsic electromagnetic shielding capability while maintaining the weight advantages of composite materials
Solution Approach 2:
The composite support layer is designed to perform multiple functions simultaneously: mechanical support, electromagnetic shielding, and stress buffering, eliminating the need for separate metal shielding layers and achieving weight reduction while maintaining shielding effectiveness
4Stability of the object's composition
If rigid metal support layers are used, then structural stability is maintained, but stress buffering capability is reduced
Solution Approach 1:
The patent changes the mechanical parameters of the support layer by using resin matrices with appropriate viscoelastic properties and fiber reinforcement configurations that provide both structural stability and stress buffering capability, unlike rigid metal plates that are brittle and cannot absorb stress
Solution Approach 2:
The combination of resin matrix (providing flexibility and stress absorption) with fiber reinforcement (providing structural stability) creates a composite material that exhibits both stability and stress buffering characteristics, resolving the contradiction between rigidity and stress absorption
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 composite material support layer reduces weight and maintains structural integrity while effectively shielding electromagnetic interference, preventing display abnormalities and reducing overall module weight.
Implementation Method 1
the composite material layer is doped with an electromagnetic shielding material... the electromagnetic field generated by devices is easy to interfere with the display layer
Implementation Method 2
the composite material comprises at least a resin matrix and a fiber material... provides enhanced shielding and stress buffering capabilities
Data Source
AI summary
Examples of the present disclosure disclose a display module and a terminal device. The display module includes a support layer, a backplane, and a display panel, wherein the display panel is disposed on one side of the backplane away from the support layer. The support layer includes a composite material layer which plays a supporting role, and the composite material layer includes at least a resin matrix and a fiber material. The weight of the support layer is reduced by preparing the composite material layer from a composite material with a density less than that of a SUS material.