Foldable Display Panel Support Structure for Thin EM Wave Absorption
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Solution Overview
Problem
Existing display devices, particularly bendable and foldable ones, face challenges in reducing thickness while effectively blocking and absorbing electromagnetic waves.
Innovation Solution
A display device design incorporating a panel support layer with a specific structure comprising layers of fibers extending in different directions and a lower functional layer containing magnetic metal powder, which includes a lattice or stripe pattern to enhance electromagnetic wave absorption, maintaining equal thickness across folding and non-folding areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional panel support structure is used, then structural integrity is maintained, but the device thickness cannot be reduced and electromagnetic wave absorption is insufficient
Solution Approach 1:
The panel support layer is constructed as a composite material incorporating magnetic metal powder particles dispersed within a polymer matrix containing carbon fibers. This composite structure enables the layer to simultaneously provide structural support, electromagnetic wave absorption, and flexibility without increasing overall device thickness
Solution Approach 2:
The magnetic metal powder is specifically concentrated in the lower functional layer adjacent to the folding portion, creating localized electromagnetic wave absorption capability where it is most needed. The polymer matrix with carbon fibers provides structural integrity throughout the panel support layer
2Length of stationary object
If the panel support layer is made thinner to reduce device thickness, then portability is improved, but electromagnetic wave absorption performance deteriorates
Solution Approach 1:
By combining magnetic metal powder with high-permeability properties and carbon fiber-containing polymer in a composite structure, the invention achieves enhanced electromagnetic wave absorption per unit thickness. The synergistic effect of these materials allows thin layers to provide superior absorption performance
Solution Approach 2:
The invention optimizes the concentration and particle size distribution of magnetic metal powder within the thin panel support layer, adjusting material parameters to maximize electromagnetic wave absorption efficiency while maintaining structural integrity and flexibility
3Object-affected harmful factors
If magnetic metal powder is added to enhance electromagnetic wave absorption, then absorption performance is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The invention merges multiple functions into a single integrated panel support layer: structural support from the polymer-cotton fiber matrix, electromagnetic wave absorption from magnetic metal powder, and flexibility from the fabric construction. This eliminates the need for separate electromagnetic shielding layers, simplifying overall device structure
Solution Approach 2:
The lower functional layer serves multiple purposes simultaneously: it provides structural support as part of the panel assembly, acts as an electromagnetic wave absorber through magnetic metal powder, and maintains flexibility for foldable applications. This multi-functionality reduces the number of separate components needed
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 achieves reduced thickness and superior electromagnetic wave blocking and absorption performance, particularly in folding areas, without compromising structural integrity or flexibility.
Implementation Method 1
a lower functional layer containing magnetic metal powder
Implementation Method 2
lower functional layer containing magnetic metal powder
Implementation Method 3
the first fiber and the second fiber are polymers each containing carbon fiber or glass fiber
Data Source
AI summary
A display device includes: a display panel including an emission material layer and a touch sensor layer on the emission material layer and including a digitizer; and a panel support layer under the display panel, wherein the panel support layer includes: a first layer including a first fiber extending in a first direction, a second layer on the first layer and including a second fiber extending in a second direction different from the first direction, a third layer on the second layer and including the first fiber extending in the first direction, and a lower functional layer including a magnetic metal powder.