Display Substrate Scan Line Structure for Short-Circuit Pixel Repair
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Solution Overview
Problem
Transparent display apparatuses using AMOLED technology face issues with dark or bright spots due to thin film transistor failures, which degrade display quality, and the limited space in the display region complicates circuit wiring.
Innovation Solution
The display substrate design includes a scanning signal line with outer ring portions that reduce load and avoid excessive overlap with longitudinal signal lines, allowing for pixel repair by cutting off short-circuited conductive lines, and a structure that minimizes circuit overlap while maintaining functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the scanning signal line extends through both non-light-emitting region and display region, then the scanning signal can be transmitted effectively, but the scanning signal line overlaps with longitudinal signal lines causing increased resistance and potential short circuits
Solution Approach 1:
The scanning signal line is divided into multiple segments: a trunk portion in the non-light-emitting region and multiple outer ring portions in the display region. Each outer ring portion includes first and second conductive lines that are spaced apart, allowing the scanning signal to be transmitted through multiple paths while reducing overlap with longitudinal signal lines.
Solution Approach 2:
The scanning signal line transitions from a single linear path to a multi-dimensional structure with outer ring portions that extend in both first and second directions. This dimensional expansion allows the signal line to navigate around longitudinal signal lines, reducing overlap while maintaining effective signal transmission across the display region.
2Device complexity
If the display region is made smaller to reduce circuit overlap, then manufacturing complexity is reduced, but the display area is insufficient for large-sized displays
Solution Approach 1:
The display substrate is divided into distinct non-light-emitting region and display region, with the scanning signal line strategically routed. The outer ring portions allow the scanning signal to reach the display region without requiring the entire display area to be reduced, maintaining large display size while managing circuit complexity.
Solution Approach 2:
The scanning signal line structure is designed to be adaptable, with outer ring portions that can extend flexibly to cover the required display area. This dynamic configuration allows the circuit layout to scale with large-sized displays while maintaining manageable complexity through the modular outer ring structure.
3Reliability
If conductive lines are made thicker to reduce resistance, then signal transmission improves, but the space for circuit wiring is further reduced
Solution Approach 1:
Instead of using a single thick conductive line, the scanning signal line is segmented into multiple thinner outer ring portions with first and second conductive lines. This segmentation allows the signal to be transmitted through multiple parallel paths, effectively reducing resistance without requiring any single line to be excessively thick, thus preserving wiring space.
Data Source
AI summary
A display substrate, a method for operating the same, and a display apparatus are provided. In the display substrate, the scanning signal line extends along the first direction, passes through the non-light-emitting region and the display region; the longitudinal signal line is in the display region and extends along a second direction; the scanning signal line includes an outer ring portion, and the outer ring portion includes a first conductive line and a second conductive line. The second conductive line is spaced from the first conductive line in the second direction, both the first conductive line and the second conductive line extend along the first direction, extend from the non-light-emitting region to the display region, and overlap with the longitudinal signal line; the scanning signal line includes a trunk portion extending along the first direction, and electrically connected with both the first conductive line and the second conductive line.