Display Panel Extension Cables for Signal Mending
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Solution Overview
Problem
In liquid crystal display panel production, abnormal short-circuits in metal cables lead to reduced product yield and cost waste, as signal transfer is disrupted when an active switch is disconnected, and existing mending methods are inefficient due to limited design space and increased complexity.
Innovation Solution
The display panel design includes a substrate with strategically arranged gate electrode layers, a common electrode cable, and signal cables, with overlapping regions and extension cables that allow for signal transfer continuation and efficient laser cutting to isolate defects, reducing the need for repeated cutting and improving mending rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the active switch is disconnected to isolate a short circuit defect, then the defect is isolated and the sub-pixel can form a dark dot, but the signal cable cannot normally transfer signals
Solution Approach 1:
The signal cable is segmented into multiple sections with extension cables that can be independently controlled. The extension cables allow the main signal cable to be disconnected at the defect location while maintaining signal transmission through alternative paths, thus isolating the defect without losing signal transfer capability.
Solution Approach 2:
Extension cables act as intermediary elements between the main signal cable and the pixel electrodes. These extension cables provide alternative signal transmission paths when the main cable is disconnected, serving as mediators that maintain signal flow despite the disconnection needed for defect isolation.
2Reliability
If laser cutting is used to cut the active switch endpoint, then the defect is isolated, but the design space is limited and the mending process becomes complex
Solution Approach 1:
The extension cables are pre-designed and positioned to overlap with the signal cable at specific regions before any defects occur. This preliminary arrangement ensures that when defects require laser cutting, the extension cables are already in place to provide alternative signal paths, simplifying the mending process and expanding the effective design space for defect isolation.
Solution Approach 2:
The extension cables are arranged in overlapping regions that extend beyond the standard signal cable path, effectively adding spatial dimensions to the cable layout. This dimensional expansion provides more flexibility in positioning cut points and simplifies the mending process by creating larger operational spaces for laser cutting and repair activities.
Data Source
AI summary
This application discloses a display panel and a display apparatus. The display panel includes a common electrode cable, an active switch, and a signal cable. The signal cable is overlapped with the active switch to form a first overlapping region, and a first extension cable and a second extension cable of the common electrode cable are connected to the signal cable to form a second overlapping region and a third overlapping region.