Array Substrate Repair Lines for Disconnected Data Line Restoration
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Solution Overview
Problem
In capacitive sensing touch screens, data line disconnections due to film formation quality issues, environmental factors, and scratching severely impact display and touch functions, necessitating an effective method for repairing faulty data lines.
Innovation Solution
An array substrate design incorporating touch electrode lines, data lines, and repair lines, where the repair lines are connected to touch electrode lines at specific intersection points to replace disconnected data lines, allowing for seamless integration and reuse as touch electrode lines, thereby ensuring display and touch functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data lines are used to supply power to pixel electrodes, then display function is achieved, but data line disconnection occurs due to film formation quality, environmental factors and scratching
Solution Approach 1:
The patent applies preliminary action by pre-configuring repair lines alongside data lines during the manufacturing process. These repair lines are prepared in advance as backup pathways, positioned parallel to the data lines and connected to touch electrode lines at specific intersection points, so that when data line disconnection occurs later due to environmental factors or scratching, the repair infrastructure is already in place to enable quick restoration without requiring complex rework
Solution Approach 2:
The patent uses touch electrode lines as intermediary elements to bridge the connection between repair lines and data lines. When a data line disconnects, the repair line connects to the same touch electrode lines that the data line intersects, using these touch electrode lines as mediators to restore the electrical pathway. This intermediary approach allows the repair system to leverage existing structural elements rather than creating entirely new connection paths
2Ease of repair
If repair lines are added to the array substrate, then data line disconnection can be repaired, but device complexity increases
Solution Approach 1:
The patent merges the repair function with existing structural elements by having repair lines share the same physical layer and routing paths as data lines. Both data lines and repair lines are formed on the same array substrate layer and intersect with touch electrode lines at similar locations. This merging approach allows the repair infrastructure to be integrated into the existing design without adding separate complex repair mechanisms or additional layers
Solution Approach 2:
The touch electrode lines serve multiple functions: they act as both touch sensing elements and as connection intermediaries for both data lines and repair lines. By making the touch electrode lines universal components that can interface with multiple types of conductive lines, the patent reduces the need for dedicated repair-specific structures, thereby minimizing the increase in device complexity while still enabling effective repair capability
3Ease of repair
If repair lines are positioned to intersect with touch electrode lines, then repair functionality is achieved, but interference between signal lines may occur
Solution Approach 1:
The patent applies local quality by providing insulation specifically at the intersection points where repair lines and data lines cross touch electrode lines. Rather than insulating entire line segments, the insulation is localized to the critical intersection regions. This targeted insulation approach prevents signal interference at the points where multiple lines meet, while maintaining the overall repair functionality and minimizing the impact on signal transmission quality
Data Source
AI summary
The present disclosure discloses an array substrate, a display apparatus and a method for repairing faults of an array substrate, which belong to the field of display technologies. The array substrate comprises: a plurality of touch electrode lines, a plurality of data lines and a plurality of repair lines, wherein the plurality of touch electrode lines are intersected with and insulated from the plurality of data lines and the plurality of repair lines, and a repair line is parallel to a data line. The repair line is connected to parts on both sides of a disconnected position of the data line when the data line is disconnected. In embodiments of the present disclosure, when a data line in the array substrate is disconnected, the disconnected data line may be replaced by a repair line, thereby achieving repairing the disconnected data line and ensuring a display quality and a touch function of a display device.