Flexible Substrate Micro-Grooves Stretchability Support
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Solution Overview
Problem
Flexible substrates used in display technology face challenges in stretchability due to their relatively large elastic modulus and thickness, which can lead to damage during deformation or stretching.
Innovation Solution
A flexible substrate with micro-grooves in the inter-subpixel region and an extension layer with varying elastic modulus regions, where the extension layer is modified by light irradiation, providing both ductility and support performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the substrate is made thicker and with larger elastic modulus to improve support performance, then support performance is improved, but stretchability deteriorates and damage occurs during deformation
Solution Approach 1:
The substrate is segmented into multiple regions with different properties: sub-pixel regions maintain original thickness and material properties for support, while inter-subpixel regions have reduced thickness or different material composition for flexibility. This segmentation allows the substrate to simultaneously achieve support performance in critical areas and stretchability in non-critical areas.
Solution Approach 2:
Different regions of the substrate are assigned different local qualities: the sub-pixel regions have higher elastic modulus and thickness for support, while inter-subpixel regions have lower elastic modulus and reduced thickness for deformation. This local differentiation resolves the contradiction by optimizing each region for its specific function.
2Adaptability or versatility
If micro-grooves are formed in the support layer to improve stretchability, then stretchability is improved, but support performance may deteriorate
Solution Approach 1:
The support layer is segmented into regions with and without micro-grooves. Micro-grooves are formed only in inter-subpixel regions where stretchability is needed, while sub-pixel regions remain intact to maintain support performance. This selective segmentation allows both functions to coexist.
Solution Approach 2:
The micro-groove structure is applied locally only to inter-subpixel regions, giving those areas enhanced stretchability through the groove-induced deformation capability, while sub-pixel regions maintain their original solid structure for support. The local quality differentiation resolves the contradiction between support and stretchability.
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 enhanced stretchability and stress distribution, preventing damage to sub-pixel regions by allowing material deformation in the inter-subpixel region, while maintaining support performance through the reinforcement region.
Implementation Method 1
the extension layer is made of a material capable of being modified by light irradiation
Data Source
AI summary
The present disclosure provides a flexible substrate, a method for manufacturing the same, a method for manufacturing a display panel and a display device. The flexible substrate has sub-pixel regions and an inter-subpixel region between adjacent sub-pixel regions. The flexible substrate includes a support layer including a plurality of micro-grooves, and the plurality of micro-grooves are on one side of the support layer and in the inter-subpixel region.