Grooved Plate Adhesive Layer for Foldable Display Stability
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Solution Overview
Problem
Foldable display devices face issues with adhesive layer lifting and deformation during folding, which affects the stability and durability of the display module.
Innovation Solution
A foldable display device design featuring a plate with grooves in the folding area and an adhesive layer that overlaps a portion of the grooves, positioned to maintain stability and prevent lifting, with a protective member and digitizer for enhanced support and functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the adhesive layer is positioned to overlap the folding area with grooves, then the reliability of the display module is improved, but the device complexity increases
Solution Approach 1:
The plate is divided into a folding area and a non-folding area, with the folding area containing multiple grooves that segment the structure. This segmentation allows the adhesive layer to be positioned strategically over the grooves in the folding area, providing enhanced stability during folding while maintaining a relatively simple overall plate design.
Solution Approach 2:
The adhesive layer is positioned to overlap specifically with the folding area containing grooves, rather than uniformly across the entire plate. This localized positioning provides targeted reinforcement where it is most needed during folding operations, improving reliability without requiring complex adhesive coverage throughout the entire device.
2Ease of manufacture
If the adhesive layer overlaps a portion of the folding area, then the ease of manufacture is improved, but the stability during folding deteriorates
Solution Approach 1:
The folding area is segmented into multiple grooves, and the adhesive layer is positioned to overlap these grooves. This segmentation creates discrete bonding zones that are easier to manufacture while maintaining stability, as the adhesive doesn't need to cover the entire folding area uniformly but rather targets specific groove regions.
Solution Approach 2:
The adhesive layer overlaps only a portion of the folding area rather than the entire area. This partial action is sufficient to prevent lifting and maintain stability during folding, while simplifying the manufacturing process by reducing the amount of adhesive material and positioning complexity required.
3Strength
If the plate includes multiple grooves in the folding area, then the deformation resistance is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The folding area is divided into multiple grooves that are positioned along a first direction. This segmentation provides deformation resistance through the distributed groove structure, while the regular spacing and orientation of grooves simplifies manufacturing by providing a repeatable pattern rather than requiring complex individual positioning of each groove.
Solution Approach 2:
The grooves are positioned asymmetrically relative to the folding direction, with multiple grooves arranged along the first direction while the folding occurs in the second perpendicular direction. This asymmetric arrangement optimizes deformation resistance for the specific folding operation while maintaining manufacturability through clear directional guidance.
Data Source
AI summary
A display device includes: a display module; a plate on one surface of the display module; and an adhesive layer between the display module and the plate, wherein the plate includes a folding area and a folding peripheral area, the folding area of the plate includes a plurality of grooves, and the adhesive layer overlaps a portion of the folding area.