Bending Display Substrate with Segmented Wiring and Corner Extraction
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Solution Overview
Problem
Current bending display technologies for electronic devices, such as smartphones, do not effectively enhance the screen-to-body ratio and user experience due to suboptimal performance in achieving ultra-narrow or bezel-less designs.
Innovation Solution
A display substrate with a main display area and a bending portion around its periphery, featuring side display areas and corner portions that extend continuously, allowing for a flexible base substrate with specific layer configurations and wiring arrangements that enable bending without overlapping critical layers, thereby facilitating a full-screen display with a larger screen-to-body ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If a bending display solution is adopted to increase screen-to-body ratio, then the display area is expanded, but the structural integrity and wiring reliability deteriorate due to bending stress
Solution Approach 1:
The bending portion is divided into multiple side display areas and corner portions, with wiring segmented into first, second, and third wiring portions located in different regions. This segmentation allows each wiring portion to be independently routed and protected, reducing the risk of complete wiring failure during bending.
Solution Approach 2:
The wiring structure transitions from a planar two-dimensional layout to a three-dimensional configuration that extends across different layers and regions. The wiring includes portions in side display areas and corner portions, creating a spatial distribution that accommodates bending without compromising connectivity.
2Stability of the object's composition
If the bending portion includes corner portions between side display areas, then the continuity of the bending structure is improved, but the manufacturing complexity increases due to multi-region layer configuration
Solution Approach 1:
Different regions of the display substrate have different structural configurations. The side display areas contain display layers and encapsulation layers, while the corner portions have simplified structures without these layers. This local differentiation allows the bending portion to maintain continuity while simplifying manufacturing in non-critical regions.
3Reliability
If the orthographic projection of display layers does not overlap with corner portions, then the wiring damage risk during bending is reduced, but the display area is decreased
Solution Approach 1:
The display layers and encapsulation layers are extracted from the corner portions, creating non-display areas in these regions. This extraction eliminates the risk of layer damage during bending in corner areas while concentrating the display functionality in the side display areas where the structure is more robust.
Data Source
AI summary
A display substrate, including: a main display area, including a main display surface; and a bending portion, disposed around a periphery of the main display area, the bending portion is connected to the periphery of the main display area and is bent in a direction away from the main display surface, the bending portion includes: a plurality of side display areas, each of which is connected to a side edge of the main display area, and each side display area includes a side display surface; and a plurality of corner portions, each corner portion is connected to a turning of the main display area and is located between two adjacent side display areas, and wherein the main display surface and the side display surfaces constitute a display area, the corner portions constitute a non-display area, and the plurality of side display areas and the plurality of corner portions extend continuously.