Rollable Display Back Cover Openings for Stress Relief and Protection
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Solution Overview
Problem
Existing rollable display devices face issues such as stress-induced breakage, separation between display panel and back cover, bending problems, and external impact vulnerabilities, which compromise reliability and user safety.
Innovation Solution
A back cover with a combination of high rigidity and flexibility, achieved through strategically placed openings, enhances adhesiveness and minimizes stress, ensuring the display panel remains flat and protected from external impacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the back cover is made with high rigidity to protect and support the display panel, then the protective capability is improved, but the flexibility to be rolled is worsened
Solution Approach 1:
The back cover is divided into multiple regions with different rigidity characteristics. A first back cover region with higher rigidity supports the display panel, while a second back cover region with lower rigidity enables rolling. This segmentation allows the single back cover to simultaneously provide both protection and flexibility.
2Adaptability or versatility
If the back cover is made with high flexibility to be rolled, then the rollability is improved, but the protective capability is worsened
Solution Approach 1:
Different regions of the back cover are assigned different rigidity properties according to their functional requirements. The region supporting the display panel maintains high rigidity for protection, while the rolling region has reduced rigidity for flexibility. This local differentiation resolves the contradiction between overall protection and localized flexibility.
3Stability of the object's composition
If the display panel and back cover are fastened tightly to prevent separation, then the structural stability is improved, but the bending problem is worsened
Solution Approach 1:
The back cover is segmented into a first region that is fastened to the display panel for stability and a second region that remains unfastened to allow bending. This segmentation enables the structure to maintain stability where needed while permitting necessary deformation in other areas.
4Object-affected harmful factors
If the side of the display device is enhanced for rigidity to resist external impact, then the impact resistance is improved, but the flexibility to be rolled is worsened
Solution Approach 1:
The back cover structure implements local quality differentiation where the first back cover region providing impact resistance has higher rigidity, while the second back cover region enabling rolling has lower rigidity. This localized property assignment allows the device to resist external impacts while maintaining rollability.
Data Source
Figure 1A
Figure 1B
Figure 2
AI summary
A display device includes: a display panel and a back cover which supports the display panel on a rear surface of the display panel and includes a plurality of openings and a length of a lower edge of the back cover is larger than a length of an upper edge of the back cover. Therefore, when the display device is rolled, a rolling position of the display device may be guided.