Foldable Display Adhesive Structure for Flat Non-Folding Regions
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Solution Overview
Problem
Folding of display devices results in curved sections that degrade display quality.
Innovation Solution
A foldable display device assembly comprising a rigid film, flexible modules, and adhesive films to position the neutral plane and maintain a flat configuration, minimizing deformation and preserving display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the display device is folded to provide a compact form factor, then portability is improved, but display quality degrades due to curved sections
Solution Approach 1:
The display device is divided into multiple sections: flexible display sections that can be folded and rigid flat sections that maintain display quality. The rigid film creates distinct folding regions and non-folding regions, segmenting the display surface to preserve quality in critical areas while allowing flexibility elsewhere.
Solution Approach 2:
Different regions of the display device have different properties: some regions are made flexible to enable folding, while other regions are made rigid to maintain flatness and display quality. The rigid film is selectively positioned to maintain flat configuration in non-folding regions where display quality is critical.
2Adaptability or versatility
If flexible materials are used to enable folding, then adaptability is improved, but structural stability deteriorates
Solution Approach 1:
The display device combines flexible materials (flexible display module, flexible modules) with rigid materials (rigid film) to create a composite structure. This allows the device to both fold (adaptability) and maintain structural integrity (stability) when folded, as the rigid film prevents excessive deformation while the flexible components enable the folding motion.
3Ease of operation
If the neutral plane is positioned in the flexible display module, then folding flexibility is improved, but deformation increases
Solution Approach 1:
The rigid film acts as an intermediary element between the flexible display module and the flexible modules. It controls the neutral plane position and limits deformation while still allowing folding to occur. The rigid film mediates between the need for flexibility and the need to minimize deformation.
Data Source
AI summary
A foldable display device assembly being foldable about a folding axis, including a flexible display module, a first plate below the flexible display module, a second plate below the first plate and including first and second portions spaced apart with the folding axis therebetween, a first adhesive film between the first and second plates and including first and second sections spaced apart with the folding axis therebetween, a second adhesive film and a third adhesive film between the first and second plates and spaced apart from the first adhesive film, in which the second and third adhesive films are closer to the folding axis than the first adhesive film, the third adhesive film overlaps the second adhesive film, and a sum of a thickness of the second and third adhesive films is substantially the same as a thickness of the first adhesive film.