Rollable Display Back Cover with Bent Edges for Stress Management
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Solution Overview
Problem
Conventional rollable display devices face issues with stress-induced breakage, separation between the display panel and back cover, and external impact resistance due to lack of rigidity and flexibility, as well as moisture and oxygen permeation, which affect their reliability and usability.
Innovation Solution
A rollable display device design featuring a back cover with strategically placed openings to enhance flexibility and rigidity, improve adhesiveness between the display panel and back cover, and incorporate a driving unit to manage stress and bending, while sealing edges to prevent moisture and oxygen ingress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the back cover is made rigid to protect and support the display panel, then protection and support capability is improved, but flexibility to be rolled is worsened
Solution Approach 1:
The back cover is divided into a rigid portion and a flexible portion, allowing each section to fulfill its specific function - the rigid portion provides structural support and protection, while the flexible portion enables rolling capability
Solution Approach 2:
Different regions of the back cover have different mechanical properties - the rigid portion maintains structural integrity while the flexible portion allows deformation during rolling, achieving both protection and adaptability
2Adaptability or versatility
If the back cover is made flexible to be rolled, then rolling capability is improved, but rigidity for impact resistance is worsened
Solution Approach 1:
The back cover is segmented into rigid and flexible zones, where the rigid portion provides impact resistance when the device is in use, and the flexible portion enables rolling when needed
Solution Approach 2:
The back cover dynamically transitions between rigid and flexible states depending on operational requirements - rigid during display operation for protection, flexible during rolling for portability
3Stability of the object's composition
If the display panel and back cover are fastened tightly to prevent separation, then structural stability is improved, but bending and breakage of driving IC is worsened
Solution Approach 1:
The fastening structure is designed with different characteristics in different areas - providing strong bonding where structural stability is needed while creating flexible zones that accommodate bending without damaging the driving IC
4Ease of manufacture
If the edges of the back cover are left sharp for structural integrity, then manufacturing simplicity is improved, but user safety is worsened
Solution Approach 1:
Instead of leaving edges sharp and adding separate protective elements, the design inverts the approach by making the edges themselves flexible through the flexible portion, allowing them to bend and become inherently safer
Data Source
AI summary
A display device includes: a display panel and a back cover which is disposed on one surface of the display panel and has a plurality of openings in which a left edge and a right edge among a plurality of edges of the back cover are bent toward the display panel. Therefore, a display device in which the left edge and the right edge of the back cover are bent to improve a sharp edge is provided and an injury risk of the user due to the sharp edge may be avoided.