Electrorheological Layer for Foldable Display Bending
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Solution Overview
Problem
Current foldable flexible display screens face challenges in achieving effective ball dropping height and pencil hardness due to limitations in flexible polymer materials used in cover modules, which affect the bending resistance and surface hardness of OLED screens.
Innovation Solution
A display panel with a cover module incorporating an electrorheological layer in the bending area, which transitions from a liquid to a solid state under an electric field, providing enhanced rigidity for protection and supporting the screen while allowing flexible bending, and includes a buffer and rigid portions for improved wear resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If flexible polymer materials are used in the cover module to enable effective bending, then the bending flexibility is improved, but the surface hardness and ball dropping height are insufficient
Solution Approach 1:
The patent applies parameter changes by utilizing the electrorheological material's ability to change its physical state between liquid and solid forms. When voltage is applied, the material transitions from a liquid state (providing flexibility for bending) to a solid state (providing hardness for protection), thus dynamically adjusting the mechanical properties to resolve the contradiction between bending flexibility and surface hardness.
Solution Approach 2:
The patent implements dynamics by making the cover module's mechanical properties adjustable rather than fixed. The electrorheological layer can dynamically switch between liquid and solid states based on voltage application, allowing the cover module to be flexible during bending operations and rigid during normal use or impact scenarios, thereby resolving the static contradiction between flexibility and hardness.
2Adaptability or versatility
If flexible polymer materials are used in the cover module to enable effective bending, then the bending flexibility is improved, but the wear resistance is insufficient
Solution Approach 1:
The patent applies parameter changes by utilizing the electrorheological material's ability to change its physical state between liquid and solid forms. When voltage is applied, the material transitions from a liquid state (providing flexibility for bending) to a solid state (providing hardness for protection), thus dynamically adjusting the mechanical properties to resolve the contradiction between bending flexibility and surface hardness.
Solution Approach 2:
The patent implements dynamics by making the cover module's mechanical properties adjustable rather than fixed. The electrorheological layer can dynamically switch between liquid and solid states based on voltage application, allowing the cover module to be flexible during bending operations and rigid during normal use or impact scenarios, thereby resolving the static contradiction between flexibility and hardness.
3Adaptability or versatility
If the electrorheological layer is disposed only in the bending area, then the bending flexibility is maximized, but the protection coverage is reduced
Solution Approach 1:
The patent applies local quality by differentiating the functional requirements of different regions. The bending area contains the electrorheological layer for flexibility, while the non-bending areas have rigid portions for protection. This spatial differentiation of material properties resolves the contradiction between maximizing bending flexibility in the folding region and providing adequate protection coverage in the display regions.
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 electrorheological layer ensures effective ball dropping height and wear resistance by transitioning to a solid state for protection and a liquid state for flexible bending, addressing the limitations of existing flexible polymer materials.
Implementation Method 1
an electrorheological layer disposed in the bending area... the electrorheological layer is made of an electrorheological material, which is a liquid state when the display panel is bent, and a solid state when the display panel is completely bent or flattened
Data Source
AI summary
The present invention discloses a display panel and a display device. The display panel includes a bending area and a non-bending area, and further includes a display module; a cover module provided on the display module and including an electrorheological layer corresponding to the bending area. The beneficial effect of the present invention is that the display panel and the display device of the present invention are provided with a layer of an electrorheological layer in the bending area of the display panel, which plays a protective and supporting role.