Flexible Display Support Blocks for Roll-Induced Stress Control
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Solution Overview
Problem
Existing flexible display devices suffer from high defect rates due to stress concentration during rolling and unfolding, leading to potential deformation and damage.
Innovation Solution
A flexible display device design featuring a base layer with stopper patterns and a support layer, where the support blocks are arranged to distribute stress evenly, incorporating grooves that align with the stopper patterns to maintain structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a flexible display device is designed to be rolled and unfolded, then portability and versatility are improved, but stress concentration occurs during rolling leading to high defect rates
Solution Approach 1:
The support layer is divided into multiple discrete support blocks arranged in an array, rather than using a continuous support structure. Each support block independently supports the base layer at specific locations, allowing the structure to flex between blocks during rolling while maintaining overall support, thus reducing stress concentration and defect rates
Solution Approach 2:
The support blocks are strategically positioned to provide localized support at critical areas of the base layer. The support structure has non-uniform distribution with varying support densities in different regions, matching the stress distribution patterns during rolling operations to prevent deformation and damage at vulnerable locations
2Reliability
If support blocks are arranged to distribute stress evenly, then reliability is improved, but device complexity increases due to multiple support blocks
Solution Approach 1:
The support layer is segmented into multiple identical or similar support blocks that can be manufactured using the same process and specifications. This modular approach distributes stress evenly across the display panel while maintaining manufacturing simplicity through repetition of standard components
Solution Approach 2:
Each support block serves multiple functions: providing mechanical support, distributing stress, and allowing flexibility between blocks. The same support block design is used throughout the array, eliminating the need for different component types and simplifying the overall device architecture despite the increased number of elements
Data Source
AI summary
A display device including a display panel and a supporter. The display panel includes a base layer that includes a plurality of stopper patterns and a support layer coupled to the plurality of stopper patterns. The supporter supports the plurality of stopper patterns and the support layer. The supporter includes a plurality of support blocks, each of which extends along the first direction and which are arrayed along the second direction. The plurality of support blocks include a first support block and a second support block spaced apart from each other in the second direction. The first support block includes a second portion overlapping the first stopper pattern among the plurality of stopper patterns when viewed in a plan view, and the second support block includes a first portion overlapping the first stopper pattern when viewed in a plan view.