Flexible Display Substrate Thickness Zoning for Wrinkle-Free Curved Fitting
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Solution Overview
Problem
The attachment of a flexible display substrate to a curved cover glass often results in wrinkles due to the inward bending of the cover glass boundary, leading to a poor display effect.
Innovation Solution
A flexible display substrate with specific thickness variations and hole structures in its regions, enhancing stretchability and rigidity to ensure accurate attachment to a curved cover glass without wrinkles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the flexible display substrate is stretched to attach to the curved cover glass, then the substrate can conform to the curved surface, but wrinkles occur at the edge portion leading to poor display effect
Solution Approach 1:
The flexible substrate is divided into multiple regions with different thickness characteristics: a first region with reduced thickness for stretchability, a second region with standard thickness for rigidity, and a third region with reduced thickness for attachment. This segmentation allows different parts of the substrate to serve different functions simultaneously.
Solution Approach 2:
Different regions of the flexible substrate are given different local properties through varying thickness and hole structure configurations. The first and third regions have reduced thickness and hole structures to enable stretching, while the second region maintains standard thickness to prevent wrinkles and ensure display quality at the attachment area.
2Adaptability or versatility
If the flexible substrate is made thinner to enhance stretchability, then it can be attached to curved surfaces, but the rigidity and structural integrity are reduced
Solution Approach 1:
The substrate thickness is segmented into different zones: thinner regions (first and third regions) for stretchability and thicker region (second region) for structural integrity. This allows the substrate to be both flexible where needed and strong where required.
Solution Approach 2:
The substrate has non-uniform thickness distribution with local quality variations. The first and third regions have reduced thickness to enhance stretchability for attachment, while the second region maintains standard thickness to provide rigidity and prevent wrinkles, resolving the contradiction between flexibility and strength.
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's design ensures precise fitting to curved surfaces, preventing wrinkles and improving display quality.
Implementation Method 1
each stretch region includes a first region, a second region, and a third region that are sequentially arranged in a direction going away from the non-stretch region, and at least part of the first region and at least part of the third region has a thickness smaller than that of the second region
Data Source
AI summary
Provided is a display substrate. The display substrate includes: a flexible substrate, including a non-stretch region and at least one stretch region, wherein each of the at least one stretch region is proximate a boundary of the flexible substrate relative to the non-stretch region, and each of the at least one stretch region includes a first region, a second region, and a third region that are sequentially arranged in a direction going distal from the non-stretch region, and at least part of the first region and at least part of the third region have a thickness smaller than that of the second region, the second region has a thickness equal to that of the non-stretch region; and a functional film layer on one side of the flexible substrate.