Stretchable Cover Window With Interwoven Modulus Layers
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display devices with flexible or stretchable display panels face challenges in achieving satisfactory elongation and recovery rates due to limitations in the materials used for the cover window, particularly when stretched beyond conventional limits.
Innovation Solution
The cover window is constructed with interwoven first and second materials, where the first material has a modulus ranging from 0.1 Mpa to 500 Mpa and the second material has a modulus ranging from 1 Gpa to 50 Gpa, enhancing the elongation and recovery rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional single material is used for the cover window, then the material properties are simple and easy to manufacture, but the elongation rate and recovery rate are insufficient
Solution Approach 1:
The cover window is constructed as a composite material consisting of a first material (0.1-500 MPa modulus) and a second material (1-50 Gpa modulus) interwoven in perpendicular directions. This composite structure enables the cover window to achieve both high elongation rate (50% or more uniaxial, 20% or more biaxial) and high recovery rate (90% or more), resolving the contradiction between material performance and structural simplicity.
2Strength
If the cover window is made more rigid to protect the display panel, then the protective function is improved, but the elongation capability is reduced
Solution Approach 1:
The cover window employs local quality differentiation by using two materials with distinct modulus values in different directions. The first material (low modulus: 0.1-500 MPa) provides elongation capability in its extending direction, while the second material (high modulus: 1-50 Gpa) provides structural strength and protection in its extending direction. This directional differentiation allows the cover window to simultaneously achieve both protective function and elongation capability.
Solution Approach 2:
The invention changes the physical parameter of modulus by using materials with vastly different modulus values (0.1-500 MPa vs. 1-50 Gpa) in the composite structure. This parameter differentiation enables the cover window to exhibit both flexible elongation behavior (when the low-modulus material stretches) and rigid protective behavior (when the high-modulus material provides structural support), resolving the contradiction between strength and elongation.
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 interwoven materials improve the cover window's uniaxial elongation rate to 50% or more, biaxial elongation rate to 20% or more, and recovery rate to 90%, ensuring durability and functionality under stretching conditions.
Implementation Method 1
the first material has a first modulus, and the second material has a second modulus, and where the first modulus has a value in a range of about 0.1 megapascals (Mpa) to about 500 Mpa and the second modulus has a value in a range of about 1 gigapascals (Gpa) to about 50 Gpa
Data Source
AI summary
A stretchable window includes: a first material extending in a first direction and a second material extending in a second direction that intersects the first direction. The first material and the second material are interwoven, the first material has a first modulus, and the second material has a second modulus. The first modulus has a value in a range of about 0.1 Mpa to about 500 Mpa and the second modulus has a value in a range of about 1 Gpa to about 50 Gpa.