Stretchable Substrate Spatial Crosslinking for Deformation Uniformity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Stretchable substrates with auxetic structures face challenges in achieving uniform stretching deformation due to nonuniform stress distribution, leading to deformation deviations and potential image distortion in large-area displays.
Innovation Solution
A method of manufacturing a stretchable substrate with improved deformation uniformity by controlling the spatial crosslinking degree of the matrix, involving the formation of an auxetic structure with a different Young's modulus than the substrate and fixing part, and using a filler with varying crosslinking density across regions through controlled light irradiation or heat absorption patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a stretchable substrate with auxetic structure is stretched based on external stress application, then the substrate can be deformed, but nonuniform stress distribution occurs at each position leading to deformation deviation
Solution Approach 1:
The patent applies local quality by creating regions with different crosslinking densities within the substrate. The first region has a first crosslinking density and the second region has a second crosslinking density different from the first. This spatial variation in material properties allows different parts of the substrate to respond differently to applied stress, compensating for the nonuniform stress distribution and achieving uniform deformation across the entire substrate when stretched.
2Area of stationary object
If the substrate area is increased for large-area displays, then the display coverage is improved, but stress tailoring effect causes different stress magnitudes at different positions
Solution Approach 1:
For large-area substrates, the patent divides the substrate into multiple regions with spatially varying crosslinking densities. This gradient or stepped variation in crosslinking density across different areas of the substrate compensates for the stress tailoring effect that occurs in large-area structures, ensuring that stress is more uniformly distributed across the entire large area when the substrate is stretched.
3Adaptability or versatility
If the auxetic structure is introduced to achieve negative Poisson's ratio, then mechanical variability is improved, but nonuniform induced stress hinders Poisson's ratio control effect
Solution Approach 1:
The patent introduces spatial variation in crosslinking density within the auxetic structure to compensate for nonuniform induced stress. By creating regions with different crosslinking densities, the material properties are locally adjusted to ensure that the auxetic effect (negative Poisson's ratio) is uniformly controlled across the entire substrate, preventing deformation deviations and maintaining precise Poisson's ratio control.
4Ease of manufacture
If uniform crosslinking density is used throughout the substrate, then manufacturing simplicity is maintained, but deformation deviation occurs in different regions during stretching
Solution Approach 1:
The patent implements local quality by creating regions with different crosslinking densities in the substrate. The first region has a first crosslinking density and the second region has a second crosslinking density different from the first. This spatial variation in crosslinking density compensates for nonuniform stress distribution during stretching, ensuring uniform deformation across different regions while maintaining reasonable manufacturing complexity through controlled regional differentiation.
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 approach ensures uniform stress distribution and deformation across the substrate, minimizing deformation deviations and image distortion, while maintaining mechanical stability and flexibility.
Implementation Method 1
a fixing part on the substrate part on which the auxetic is formed, wherein the fixing part has a different crosslinking density in each region
Implementation Method 2
a stretchable substrate in which a crosslinking degree of a matrix is differently controlled for each region to reduce a deviation in induced stress generated during stretching of a substrate
Data Source
AI summary
Provided is a method of manufacturing a stretchable substrate having improved stretching deformation uniformity through control of a spatial crosslinking degree according to various embodiments of the present disclosure to implement the above object. The method includes forming a substrate part of an elastic material, forming an auxetic including a plurality of unit structures on the substrate part, and forming a fixing part on the substrate part on which the auxetic is formed, wherein the fixing part has a different crosslinking density in each region.