Display Substrate Connection Structure for Rounded-Corner Signal Delay
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Solution Overview
Problem
The differences in space between rounded corner and straight edge regions on display substrates cause signal line delays, leading to abnormal displays such as split-screen phenomena due to varying electrical properties in these regions.
Innovation Solution
The display substrate design ensures that the number and type of via connection structures in connection structures for straight edge and rounded corner gate driving structures are identical, with all conductive parts in the same conductive layer, reducing electrical property differences and minimizing abnormal displays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different via connection structures are used in straight edge and rounded corner regions, then the connection can be adapted to different spatial constraints, but the electrical properties differ causing display abnormalities
Solution Approach 1:
The patent applies local quality by initially using different via connection structures (first via holes penetrating planarization and passivation layers in straight edge regions, second via holes penetrating only planarization layers in rounded corner regions) to adapt to different spatial constraints. However, this creates electrical property differences that cause display abnormalities, so the patent later uniformizes the via connection structures across all regions to ensure consistent electrical properties and eliminate display issues.
2Reliability
If via holes penetrate multiple layers (planarization and passivation), then better electrical connection is achieved, but manufacturing complexity increases
Solution Approach 1:
The patent applies local quality by using different via hole configurations in different regions: first via holes that penetrate both planarization and passivation layers are used in straight edge regions where space allows, providing better electrical connection. In rounded corner regions where space is constrained, second via holes penetrating only the planarization layer are used, reducing manufacturing complexity while maintaining functional performance.
Data Source
AI summary
A display substrate and a display device. In the display substrate, a plurality of first output ends of the plurality of straight edge gate driving structures are connected to the plurality of first signal lines through a plurality of first connection structures, and a plurality of second output ends of the plurality of rounded corner gate driving structures are connected to the plurality of second signal lines through a plurality of second connection structures; the first conductive part and the second conductive part are located in a same conductive layer, and a number and a type of the plurality of via connection structures in each of the plurality of first connection structures are the same as a number and a type of the plurality of via connection structures in each of the plurality of second connection structures.