Curved Display Interconnection Segmentation for Crack Reduction
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Solution Overview
Problem
Display devices with curved portions are prone to cracks in their interconnections due to tension, which existing technologies have not adequately addressed.
Innovation Solution
A display device design featuring a display substrate with both bend and non-bend portions, where first and second interconnections are strategically arranged, and a polarizing plate with a protrusion region that overlaps the interconnections, positioning them in a neutral plane to reduce tension and crack occurrence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the display device includes curved portions, then the display device achieves curved display functionality, but cracks occur in the interconnections disposed on the curved portions
Solution Approach 1:
The interconnections are segmented into first interconnections extending in the first direction and second interconnections extending in the second direction, allowing the stress to be distributed across different orientations rather than concentrated in a single direction, thereby reducing crack occurrence on curved portions
Solution Approach 2:
The patent applies different interconnection configurations to different regions: first interconnections are used in regions where stress primarily occurs in the first direction, while second interconnections are used in regions where stress occurs in the second direction, optimizing the structural response to localized stress conditions
2Shape
If interconnections are disposed on curved portions, then the display device achieves curved display functionality, but tension concentrates on the interconnections, leading to cracks
Solution Approach 1:
The interconnection structure is divided into multiple segments with different orientations (first interconnections in the first direction, second interconnections in the second direction), which distributes the mechanical stress and tension across different pathways, preventing concentration of force on a single interconnection line
Solution Approach 2:
The patent introduces a second direction for interconnection extension that is different from the first direction, adding dimensional diversity to the interconnection layout. This multi-directional arrangement allows stress to be distributed in multiple dimensions rather than concentrated along a single linear path
Data Source
Figure 1
Figure 2
Figure 3A~3E
AI summary
A display device (1 0 ) comprises a display substrate ( 100 ), first interconnections ( 110 ), second interconnections ( 140 ), a driving circuit (3 00 ) and a polarizing plate ( 200 ). The display substrate ( 100 ) includes a bend portion ( 1000 ) which is curved with respect to an axis parallel to a first direction (DR 1). The first interconnections ( 110 ) extend in the first direction (DR 1 ) and are on the display substrate ( 100). The second interconnections ( 140 ) are on the display substrate ( 100 ), connected to the first interconnections ( 110) and extend in a second direction different from the first direction (DR 1 ). The driving circuit ( 300) is electrically connected to the first interconnections ( 110 ) and the second interconnections ( 140) and provides driving signals to the first interconnections ( 110 ) and the second interconnections ( 140 ). The polarizing plate ( 200) is on the display substrate ( 100 ) and overlaps the first interconnections ( 110 ) and the second interconnections ( 140 ).