Foldable Display Window Grooves for Stress Dispersion
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Solution Overview
Problem
Flexible display devices face issues with deformation-induced stains when the window is repeatedly folded, as existing designs lack effective stress dispersion and folding mechanisms.
Innovation Solution
A flexible display device design featuring a window with grooves of varying widths and depths on opposite surfaces, along with a resin filling these grooves, to disperse stress and facilitate smooth folding and curvature without visible stains.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the window is made rigid (e.g., glass) for impact resistance, then strength is improved, but the window cannot be folded without creating stains
Solution Approach 1:
The window is segmented into multiple regions by forming grooves that divide the continuous surface into separate sections. This segmentation allows the window to flex and fold at the groove locations while maintaining structural integrity in the solid portions, enabling rigid glass windows to be used in foldable displays without creating stains.
Solution Approach 2:
The window structure is modified locally by adding grooves at specific positions corresponding to the folding area. The grooves create localized flexibility zones while the rest of the window maintains its rigid properties, allowing the window to accommodate folding movements without compromising overall strength or creating visible stains.
2Adaptability or versatility
If the window is made flexible to allow folding, then foldability is improved, but visibility and protection are reduced
Solution Approach 1:
Instead of making the entire window flexible, the window is segmented with grooves that provide localized flexibility only where needed for folding. The majority of the window surface remains as a solid protective layer, maintaining visibility and protection while enabling foldability at specific locations.
Solution Approach 2:
The window structure is modified locally by adding grooves at specific positions corresponding to the folding area. The grooves create localized flexibility zones while the rest of the window maintains its rigid protective properties, allowing the window to accommodate folding movements without compromising overall strength or visibility.
3Adaptability or versatility
If grooves are added to the window to enable folding, then foldability is improved, but manufacturing complexity increases
Solution Approach 1:
The window is segmented into multiple regions by forming grooves that divide the continuous surface into separate sections. This segmentation allows the window to flex and fold at the groove locations while maintaining structural integrity in the solid portions, enabling rigid glass windows to be used in foldable displays without creating stains.
Solution Approach 2:
The window structure is modified locally by adding grooves at specific positions corresponding to the folding area. The grooves create localized flexibility zones while the rest of the window maintains its rigid properties, allowing the window to accommodate folding movements without compromising overall strength or creating visible stains.
4Adaptability or versatility
If the grooves are deep to allow folding, then foldability is improved, but structural integrity deteriorates
Solution Approach 1:
The window is segmented into multiple regions by forming grooves that divide the continuous surface into separate sections. This segmentation allows the window to flex and fold at the groove locations while maintaining structural integrity in the solid portions, enabling rigid glass windows to be used in foldable displays without creating stains.
Solution Approach 2:
The window structure is modified locally by adding grooves at specific positions corresponding to the folding area. The grooves create localized flexibility zones while the rest of the window maintains its rigid properties, allowing the window to accommodate folding movements without compromising overall strength or creating visible stains.
Data Source
AI summary
A display device including: a display module including a display folding portion and a display curved portion adjacent to the display folding portion, wherein the display curved portion has a curvature when the display folding portion is folded; and a window disposed on the display module, the window including a first surface and a second surface opposite to the first surface, and having first grooves overlapping the display folding portion and second grooves overlapping the display curved portion, wherein the first grooves are formed in the first surface of the window and the second grooves are formed in the second surface of the window.