Porous Anodized Support Layer for Foldable Display Weight Reduction
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Solution Overview
Problem
Foldable display devices face challenges in balancing weight reduction with enhanced impact resistance and preventing appearance defects like bright spots and scratches due to external forces, as increased rigidity of support members can make them difficult to fold and heavy.
Innovation Solution
Incorporating a porous layer with multiple holes in the support members, made of anodized metal, which reduces weight while maintaining rigidity and impact resistance by creating air gaps and distributing external forces effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the rigidity of the support member is increased to improve pressing and structural stability, then the display device gains better support and reduced appearance defects, but the support member becomes heavier and more difficult to fold
Solution Approach 1:
The support member incorporates a porous layer with multiple holes formed through anodization of a metal base layer. This porous structure reduces the overall weight and material density while maintaining structural integrity. The holes create air gaps that distribute external forces across the support member, preventing concentration of stress that would otherwise require heavier materials for equivalent protection.
Solution Approach 2:
The support member is constructed as a composite structure with a metal base layer and an oxide film layer formed through anodization. This composite material provides enhanced mechanical strength and rigidity while the porous structure of the oxide film reduces weight. The combination of metal and oxidized metal layers creates a material system that achieves both strength and weight reduction goals.
2Reliability
If the rigidity of the support member is increased to improve impact resistance, then the display device gains better protection against external forces, but the support member becomes heavier
Solution Approach 1:
The porous layer with multiple holes acts as a shock-absorbing structure that distributes impact forces across the support member. The air gaps within the porous structure provide cushioning effect, reducing the transmission of external forces to the display panel while maintaining lightweight construction. This eliminates the need for heavier solid materials to achieve equivalent impact resistance.
Solution Approach 2:
The porous oxide film layer serves as an intermediary between the metal base layer and external environmental forces. It absorbs and distributes impact energy, protecting the underlying metal layer and display panel from direct force concentration. This intermediary porous structure provides impact resistance without requiring increased weight.
3Weight of moving object
If a porous layer with multiple holes is incorporated to reduce weight, then the support member becomes lighter, but the structural integrity and rigidity may be compromised
Solution Approach 1:
The porous layer is formed through controlled anodization of the metal base layer, creating a structured oxide film with uniform holes rather than random voids. This controlled porosity reduces weight while the oxide film maintains structural continuity. The anodization process creates a hard, protective oxide layer that compensates for the reduced material density.
Solution Approach 2:
The composite structure of metal base layer and oxidized porous layer provides synergistic properties. The metal base layer provides structural strength and continuity, while the porous oxide film provides weight reduction and surface protection. Together, they achieve both weight reduction and maintained structural integrity.
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 solution provides a foldable display device with increased reliability, reduced weight, and improved impact resistance by using porous support layers that distribute external forces and prevent defects, enhancing both functionality and appearance.
Implementation Method 1
the porous layer may include multiple holes disposed on at least one side... distribute external forces effectively
Implementation Method 2
Incorporating a porous layer with multiple holes in the support members, made of anodized metal, which reduces weight while maintaining rigidity
Data Source
AI summary
A display device including a display panel including a folding area and a non-folding area, and a first support member disposed under the display panel and supporting the display panel, the first support member including a first support layer including a porous layer including multiple holes disposed on at least one side, the porous layer overlaps the non-folding area.