Grooved Back Cover for Rollable Display Stress Reduction
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Solution Overview
Problem
Conventional rollable display devices face challenges in maintaining flexibility and reducing stress on the display panel during rolling, which can lead to damage and affect luminous efficiency and image quality.
Innovation Solution
A display device with a back cover featuring grooves on both surfaces, allowing for high flexibility and reduced stress when rolled, while maintaining a flat surface and minimizing pressure differences to prevent damage and maintain image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a rigid back cover is used to protect the display panel, then the display panel is protected from damage, but the display device cannot be rolled up and flexibility is lost
Solution Approach 1:
The back cover is designed with a groove structure that enables flexibility while maintaining protective strength. The grooves allow the back cover to bend and roll without breaking, transforming the rigid protective shell into a flexible one that can be rolled up with the display panel.
Solution Approach 2:
The back cover is segmented by forming multiple grooves that divide the structure into flexible sections. This segmentation allows different parts of the back cover to deform independently during rolling, maintaining overall structural integrity while enabling flexibility.
2Adaptability or versatility
If grooves are added to the back cover to improve flexibility, then the display device can be rolled up, but the structural strength is reduced
Solution Approach 1:
The groove structure is designed with specific local characteristics - the grooves are positioned and dimensioned to provide flexibility where needed while maintaining strength in critical areas. The varying depths and patterns of grooves create local variations in rigidity that optimize both flexibility and structural integrity.
3Adaptability or versatility
If the back cover is made thin to improve flexibility, then the display device can be easily rolled, but the protective capability is reduced
Solution Approach 1:
The groove structure segments the back cover material, creating a pattern that mimics the structural efficiency of thin-walled sections. This segmentation allows the back cover to maintain protective capability through geometric design rather than relying solely on material thickness.
Data Source
AI summary
A display device comprises a display panel having a plurality of pixels and configured to be wound or unwound, and a back cover attached to one surface of the display panel and having a plurality of grooves. The grooves include a plurality of first grooves placed on the one surface of the back cover and a plurality of second grooves placed on the other surface of the back cover opposite to the one surface of the back cover. A depth of each of at least one of the first grooves and at least one of the second grooves is smaller than a maximum thickness of the back cover.