Stretchable Display Panel Deformation Control
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Solution Overview
Problem
Existing stretchable display panels face challenges in maintaining display integrity and reliability due to deformation perpendicular to the stretching direction, which can lead to damage and adhesive failure, especially when subjected to significant deformation.
Innovation Solution
A stretchable display panel design featuring transparent elastic layers with higher Young's moduli than the display layer, combined with ring-shaped plastic frames and filling portions, restricts deformation and supports the display layer, preventing damage and adhesive failure. The elastic layers and filling portions are made of materials like polydimethylsiloxane, polyurethane, and polysulfide, with specific viscosities and Young's moduli to ensure effective support and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display panel is made stretchable with apertures, then flexibility and deformability are improved, but deformation perpendicular to the stretching direction causes damage and adhesive failure
Solution Approach 1:
The non-display area is divided into multiple micropost structures spaced apart from each other. These segmented microposts allow the display panel to stretch while maintaining adhesive contact at discrete points, preventing complete adhesive failure during deformation
Solution Approach 2:
The micropost structures extend vertically from the substrate, creating a three-dimensional structure. This vertical dimension allows the adhesive to maintain contact with the substrate even when the panel stretches horizontally, as the microposts can compress and deform vertically to accommodate the stretching motion
2Reliability
If elastic layers with higher Young's modulus are added to restrict deformation, then reliability is improved, but device complexity increases
Solution Approach 1:
The elastic layers are applied selectively only to the non-display area surrounding the display region. This localized application provides the necessary mechanical support and deformation control where needed, while leaving the display area unchanged to maintain its optical and functional properties
Solution Approach 2:
The patent employs multiple layers with different material properties: the substrate, display layer, and elastic layers each have distinct Young's moduli. The elastic layers have higher Young's modulus than the display layer, creating a composite structure where the stiffer elastic layers constrain deformation while the softer display layer maintains flexibility
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 solution effectively restricts deformation perpendicular to the stretching direction, enhances the display panel's reliability, and prevents damage by providing adequate support and buffering, ensuring the display effect and product reliability are maintained even under significant deformation.
Implementation Method 1
both the first elastic layer and the second elastic layer are transparent materials and have a Young's modulus greater than that of the display layer
Implementation Method 2
the first filling portion and the second filling portion are solid and the first filling portion and the second filling portion have a Young's modulus not less than 5 Mpa and not more than 500 Mpa
Data Source
AI summary
A stretchable display panel includes a first elastic layer, a stretchable display layer and a second elastic layer. The display layer has a display area and a non-display area surrounding the display area. The first elastic layer is disposed on a side of the display layer and is fixedly connected to the non-display area. The first elastic layer is disposed on a side of the display layer and is fixedly connected to the non-display area. The second elastic layer is disposed on a side of the display layer distal to the first elastic layer, and is fixedly connected to the non-display area.