Stretchable Display Substrate Layout to Prevent Shorts and Crosstalk
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Solution Overview
Problem
Stretchable and flexible display devices face issues with short circuits and signal crosstalk due to the limited stretchability of layers like inorganic and organic layers, leading to holes and deformation, which affect display quality.
Innovation Solution
A display substrate design with islands and connection bridges, featuring annular electrodes with varying line widths and regions to prevent short circuits and signal crosstalk, where the annular electrodes are insulated and signal lines are arranged to avoid overlapping projections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If holes are formed in the base substrate to create hollowed-out regions for stretchability, then the display substrate achieves stretchable property, but short circuits and signal crosstalk easily occur
Solution Approach 1:
The base substrate is segmented into multiple islands spaced apart from each other, connected by connection bridges. This segmentation creates hollowed-out regions that enable stretchability while maintaining structural integrity through the bridge connections, preventing complete substrate failure during stretching.
Solution Approach 2:
Connection bridges serve as intermediary structures between islands, providing protected pathways for signal lines. These bridges act as mediators that maintain electrical connectivity while allowing mechanical deformation, thus preventing short circuits during stretching operations.
2Ease of operation
If signal lines are arranged on connection bridges to connect display units, then electrical connectivity is achieved, but signal crosstalk occurs between adjacent signal lines
Solution Approach 1:
The connection bridges are designed with differentiated local qualities - wider sections for power signal lines and narrower sections for data signal lines. This local variation in geometry provides natural electrical isolation between adjacent signal lines, reducing crosstalk while maintaining connectivity.
Solution Approach 2:
Signal lines are arranged in multiple dimensions on the connection bridges - some lines are positioned at different heights or layers. This dimensional separation reduces electromagnetic coupling between adjacent signal lines, effectively preventing signal crosstalk while maintaining electrical connectivity.
Data Source
AI summary
A display substrate includes: a base substrate including a plurality of islands, a plurality of connection bridges, a plurality of display units each including a first electrode, a second electrode and an electroluminescent layer and an electrical connection unit including a plurality of signal lines arranged on the connection bridges. At least one annular electrode is further arranged on each island. The annular electrode includes a first region and a second region. A line width of the annular electrode in the first region is larger than a line width the annular electrode in the second region, or the second region is a hollowed-out region.