Foldable Display Panel Surface Roughness for Hinge Durability
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Solution Overview
Problem
Existing flexible display devices lack improved folding reliability, particularly in the folding reliability and durability of folding regions in flexible display devices, leading to potential damage and reduced user convenience.
Innovation Solution
A display device with a display panel having a folding region that is foldable around a folding axis and a non-folding region adjacent to a folding axis, featuring a window with a thin-film glass and an anti-folding region, where the folding region has a lower surface roughness than the non-folding region, and a recessed portion to enhance durability and folding reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the display device uses a flexible display member that can be folded or rolled, then user convenience and portability are improved, but folding reliability and durability are worsened
Solution Approach 1:
The patent applies different surface roughness characteristics to different regions of the display panel. The folding region has a first surface roughness that is lower than the second surface roughness of the non-folding region. This local differentiation allows the folding region to have smoother surfaces that reduce stress concentration and improve folding durability, while the non-folding region maintains its original surface characteristics for display quality.
2Reliability
If the folding region has a lower surface roughness than the non-folding region, then folding reliability is improved, but manufacturing complexity is worsened
Solution Approach 1:
The patent implements local quality by creating different surface roughness characteristics in different regions. The folding region is processed to have a lower surface roughness compared to the non-folding region, which is achieved through selective surface treatment or processing methods applied only to the folding region during manufacturing.
Data Source
AI summary
A display device includes: a display panel comprising a folding region configured to be folded around a folding axis and a non-folding region adjacent to the folding region; and a window on the display panel and configured to be folded with the display panel, wherein: a side surface of the display panel has a first surface roughness in the folding region and a second surface roughness in the non-folding region; the first surface roughness is lower than the second surface roughness; and a side surface of the window has the same surface roughness in the non-folding region and the folding region.