Display Device Support Layer with Patterned Concave Portions for Sliding Motion
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Solution Overview
Problem
Existing display devices face challenges in maintaining reliability when subjected to sliding or rolling motions, particularly in bending areas where stress can lead to damage.
Innovation Solution
The display device incorporates a support layer with pattern areas and non-pattern areas, where the pattern areas include concave portions and remaining portions, optimized for sliding or rolling motions to distribute stress effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the display device is bent during sliding motion, then the display device can be compacted for portability, but stress concentration occurs in the bending area causing reliability issues
Solution Approach 1:
The non-display area in the bending region is divided into pattern areas with concave portions and remaining portions, creating local structural variations. This local quality differentiation allows the structure to better accommodate bending stresses while maintaining overall device functionality.
Solution Approach 2:
The non-display area is segmented into multiple pattern areas with concave portions, effectively dividing a continuous stress-prone region into smaller segments. This segmentation reduces stress concentration by distributing mechanical loads across multiple discrete structures rather than a single continuous area.
2Reliability
If the non-display area is made larger to accommodate bending, then stress distribution improves, but the display area is reduced
Solution Approach 1:
The non-display area incorporates concave portions that create a porous-like structure within the pattern areas. This porous configuration reduces material density in stress-prone regions, improving stress distribution while minimizing the overall area occupied by the non-display region, thereby preserving more display area.
3Ease of manufacture
If the display device structure is simplified, then manufacturing is easier, but stress resistance in bending areas is reduced
Solution Approach 1:
The pattern areas feature asymmetric concave portions with specific width ratios (first width smaller than or equal to second width), creating asymmetric stress distribution paths. This asymmetric design provides enhanced stress resistance in bending areas while maintaining compatibility with standard manufacturing processes through straightforward pattern formation.
Data Source
AI summary
Disclosed is a display device comprising a display panel, and a support layer disposed under the display panel. The display panel includes a display area that displays an image in a bending area and in a non-bending area, and a non-display area disposed adjacent to the display area in the bending area and the non-bending area. The display device is bend in the bending area during a sliding motion and not bent in the non-bending area adjacent to the bending area during the sliding motion. The non-display area that is disposed the bending area includes pattern areas and non-pattern areas adjacent to the pattern areas. Each of the pattern areas includes a concave portion and a remaining portion.