Pixel Array Substrate Layout to Minimize Coupling and Diagonal Stripes
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Solution Overview
Problem
Existing pixel array substrates face challenges in reducing frame width due to the coupling effect between transfer lines and data lines, leading to diagonal stripes in display devices, which affects both performance and aesthetics.
Innovation Solution
The pixel array substrate design includes a base with staggered scan lines, transfer lines, connection terminals, and bridge lines, where the bridge lines are structurally separated and connected through insulation layers, allowing for a different arrangement sequence of connection terminals and transfer lines to minimize coupling effects and reduce frame width.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If connection terminals are disposed above the active region to reduce frame width, then the frame width is reduced, but the coupling effect between transfer lines and data lines causes diagonal stripes
Solution Approach 1:
The connection terminals are divided into multiple groups (first connection terminal group, second connection terminal group, etc.) disposed at different locations above the active region. Each group connects to corresponding scan lines through separate transfer lines, segmenting the signal transmission paths to reduce coupling effects between adjacent lines.
Solution Approach 2:
An insulation layer is introduced as an intermediary between the transfer lines and data lines. This insulation layer acts as a physical barrier that reduces the coupling effect between the transfer lines carrying scan signals and the data lines carrying data signals, thereby preventing diagonal stripe formation.
2Object-affected harmful factors
If multiple connection terminals are arranged in a specific sequence to reduce coupling effects, then diagonal stripes are reduced, but the layout complexity increases
Solution Approach 1:
Connection terminals are segmented into multiple groups with each group containing a specific number of terminals (e.g., four terminals per group). This segmentation creates a modular layout pattern that simplifies the overall design process while maintaining the benefit of reduced coupling effects through distributed terminal placement.
Solution Approach 2:
The connection terminals within each group are arranged in an asymmetric pattern rather than a simple linear sequence. This asymmetric arrangement optimizes the spacing between terminals and their corresponding transfer lines, reducing coupling effects while providing a systematic layout approach that balances complexity reduction.
Data Source
AI summary
A pixel array substrate, including multiple pixel structures, multiple data lines, multiple scan line groups, multiple transfer line groups, multiple connection terminal groups, and multiple bridge line groups, is provided. The multiple data lines are electrically connected to the multiple pixel structures and arranged in a first direction. Each scan line group includes multiple scan lines arranged in a second direction. The multiple scan lines of the multiple scan line groups are electrically connected to the multiple pixel structures. Each transfer line group includes multiple transfer lines arranged in the first direction. The multiple transfer lines of each transfer line group are electrically connected to the multiple scan lines of a corresponding scan line group. The bridge line groups are structurally separated. Each bridge line group is electrically connected to a corresponding transfer line group and a corresponding connection terminal group.