Auxetic Stretchable Substrate for Distortion-Free Multidimensional Deformation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Stretchable displays face distortion issues during deformation due to the lack of a fixed axis or direction of deformation, requiring a substrate that can be freely deformed without distortion under low stress with low resistance, high flexibility, and high stability.
Innovation Solution
A transparent stretchable substrate is developed using a mechanical metamaterial with a negative Poisson's ratio, achieved by creating an auxetic structure with a plurality of unit structures that deform in response to external forces along one axis, controlling strain in another axis through a printing process and curing techniques, ensuring the substrate and auxetic materials have the same elastic properties and curing agents in specific ratios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional flexible substrate is used for stretchable displays, then the substrate can be deformed in one direction, but distortion occurs during multidimensional deformation
Solution Approach 1:
The substrate is divided into multiple unit structures (e.g., re-entrant honeycomb, chiral, or rotating rigid body structures) that can independently deform. Each unit structure is designed to accommodate strain in specific directions, enabling multidimensional stretching while maintaining overall structural integrity and preventing display distortion.
Solution Approach 2:
The invention transitions from conventional 2D planar substrates to 3D auxetic structures with negative Poisson's ratio. These three-dimensional unit structures enable the substrate to expand in multiple directions simultaneously when stretched, providing true multidimensional deformation capability without distortion.
2Adaptability or versatility
If the substrate structure is made complex to enable multidimensional deformation, then deformation freedom increases, but manufacturing difficulty increases
Solution Approach 1:
The invention varies key parameters of the unit structures (such as cell size, wall thickness, orientation angles, and geometric configurations) to optimize mechanical properties for multidimensional deformation. By adjusting these parameters, the substrate achieves desired Poisson's ratios and strain distribution patterns without requiring overly complex structures.
Solution Approach 2:
The substrate combines multiple materials with different mechanical properties (e.g., elastomers, polymers, or composite materials) to achieve the desired auxetic behavior and mechanical performance. This allows complex deformation characteristics to be achieved through material composition rather than purely structural complexity.
3Adaptability or versatility
If the substrate is made more flexible to allow free deformation, then mechanical variability increases, but structural stability decreases
Solution Approach 1:
The substrate employs dynamic unit structures that can adapt their stiffness and deformation characteristics in response to applied forces. The auxetic structures remain stable at rest but become highly flexible during deformation, allowing the substrate to transition between stable and flexible states as needed for different operating conditions.
Solution Approach 2:
The unit structures are pre-designed and pre-configured with specific geometric patterns and material properties that anticipate and prepare for deformation forces. This preliminary structuring ensures that when external forces are applied, the substrate deforms in controlled, predictable ways that maintain structural stability while achieving the desired mechanical variability.
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 maintains mechanical stability and high transmittance, allowing for multidimensional deformation without distortion, enhancing the degree of design freedom and mechanical stability under external forces, thereby reducing screen distortion in stretchable displays.
Implementation Method 1
generating an elastic substrate containing a mechanical metamaterial having a negative Poisson ratio
Implementation Method 2
generating a substrate part formed of an elastic material
Implementation Method 3
performing first curing and performing second curing
Data Source
AI summary
Disclosed is a method of manufacturing a transparent stretchable substrate according to various embodiments of the present disclosure. The method may include generating a substrate part formed of an elastic material, generating an auxetic including a plurality of unit structures on the substrate part, and generating a fixing part on the substrate part on which the auxetic is generated.