Stretchable Display Panel Structure for Edge Elongation Mismatch
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Solution Overview
Problem
Flexible display panels in rollable, foldable, bendable, and stretchable devices are prone to physical breakage and fatigue due to differences in elongation ratios between the display area and the peripheral area, leading to potential damage during use.
Innovation Solution
The display panel design includes stretchable units with islands, bridges, and openings, where the areas of islands and bridges increase, and openings decrease gradually towards the peripheral area, with specific shapes and sizes optimized to minimize stress concentration and prevent breakage, and the openings extend through insulating layers and substrate to facilitate stretching without significant damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the display area and peripheral area have uniform structural dimensions, then manufacturing is simplified, but stress concentration occurs at the boundary during stretching due to different elongation ratios
Solution Approach 1:
The patent applies local quality by making the islands and bridges in the peripheral area have different dimensions compared to those in the display area. Specifically, the peripheral area islands and bridges are designed with larger dimensions to compensate for the reduced elongation ratio in that region, creating a gradient structure that distributes stress evenly during stretching operations.
2Reliability
If the display panel structure is made more complex with varying island and bridge dimensions, then durability during stretching is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent segments the display panel into distinct regions (display area and peripheral area) with different structural characteristics. The islands and bridges are segmented into multiple types with different dimensions, where the peripheral area contains larger islands and bridges compared to the display area. This segmentation allows each region to be optimized for its specific elongation ratio while maintaining overall structural integrity.
Data Source
AI summary
The present disclosure relates to a display panel including a display area that can be stretched by including a plurality of stretching units and a peripheral area positioned at an edge of the display area. Each of the stretching units includes: a plurality of islands separately disposed to include a plurality of pixels disposed therein; a plurality of bridges extended from the islands to connect adjacent islands or to connect the islands with the peripheral area; and a plurality of openings disposed adjacent to the bridges, between the bridges, and between the bridges and the islands, wherein areas of the islands are gradually increased toward the peripheral area.