Stretchable Substrate With Holes For Display Apparatus
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Solution Overview
Problem
Current display substrates with bendable, foldable, or stretchable characteristics lack sufficient stretchability in all directions, leading to potential fracture when subjected to forces parallel to the substrate, as the existing holes do not effectively distribute deformation strains.
Innovation Solution
A substrate design featuring a hole region with penetrating holes and a non-hole region comprising pixel regions and connection portions, where a straight line parallel to the substrate passes through the hole region, allowing for enhanced deformation and stretchability in any direction by ensuring that forces applied parallel to the substrate pass through at least one hole, thereby increasing strain beyond material characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If holes are added to the substrate to improve stretchability, then the substrate can accommodate deformation strain, but the substrate may become weaker and more prone to fracture
Solution Approach 1:
The substrate is segmented into multiple isolated holes distributed across the substrate. Each hole acts as an independent deformation accommodation unit, allowing the substrate to stretch without creating continuous weak paths that would lead to fracture. The segmentation of deformation strain across multiple discrete holes maintains structural integrity while enabling stretchability.
Solution Approach 2:
Different regions of the substrate have different hole densities or configurations optimized for local requirements. The hole distribution is non-uniform, with higher density in regions requiring greater stretchability and lower density in regions requiring higher strength. This local optimization allows the substrate to achieve both stretchability and fracture resistance in different areas simultaneously.
2Strength
If more holes are added to increase deformation capacity, then the substrate can handle greater strain, but the manufacturing complexity increases
Solution Approach 1:
The patent optimizes key parameters such as hole diameter, hole spacing, and hole depth to achieve the required deformation capacity with a practical number of holes. By carefully selecting these parameters, the substrate can accommodate greater strain without requiring an excessive number of holes, thus maintaining manufacturing simplicity while increasing deformation capacity.
3Adaptability or versatility
If the substrate material is made more flexible to enable stretching, then the substrate can bend and fold, but the material becomes weaker and more prone to damage
Solution Approach 1:
The holes are positioned and sized to anticipate and cushion the deformation forces that will be applied during bending and folding. The holes absorb and distribute the mechanical stress before it can concentrate and cause material failure, thereby protecting the flexible substrate from damage while enabling the desired flexibility for bending and folding operations.
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 substrate achieves improved stretchability in all directions, reducing the likelihood of fracture during stretching, while maintaining a simple manufacturing process and avoiding excessive material usage, thus enhancing the substrate's durability and functionality.
Implementation Method 1
The plurality of holes comprise at least two holes having different deformation degrees
Implementation Method 2
the components can be fabricated on a substrate with stretchable characteristics, which can provide the strain required when the display device is stretched
Data Source
AI summary
A substrate and a display device. The substrate includes: a hole region including a plurality of holes penetrating the substrate; and a non-hole region including a plurality of connection portions and a plurality of pixel regions separated from each other. Each connection portion is between adjacent pixel regions to connect the adjacent pixel regions, wherein a straight line in any direction parallel to the substrate passes through the hole region and the plurality of holes include at least two holes having different deformation degrees.