Pixel Array Substrate Repair via Segmented Floating Lines
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Solution Overview
Problem
Conventional pixel array substrates face challenges in repairing broken data lines, especially when they intersect with scan lines, leading to incomplete repair and reduced display quality due to RC delay and limited repair capabilities.
Innovation Solution
The proposed pixel array substrate design includes patterned floating lines and connecting wires that are partially overlapped with data and scan lines, allowing for effective laser welding to repair broken data lines and maintain display consistency by ensuring adjacent pixels display the same color, thereby preventing RC delay and increasing yield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If a repair line is used to repair broken data lines, then the broken data line can be repaired, but the repair line becomes too long causing RC delay
Solution Approach 1:
The patent divides the repair path into multiple segments by introducing intermediate connection lines. Instead of using a single long repair line, the signal is routed through multiple shorter segments connected via connection nodes, reducing the RC delay of each segment while maintaining overall repair capability.
Solution Approach 2:
The patent introduces intermediate connection lines and connection nodes as mediators between the broken data line endpoints. These intermediaries break the long direct connection into shorter segments, reducing RC delay while still enabling signal transmission for repair purposes.
2Ease of repair
If a single repair line is used, then one broken data line can be repaired, but multiple broken data lines cannot be repaired simultaneously
Solution Approach 1:
The patent designs the repair line network with multiple interconnected repair lines that can serve multiple broken data lines. Each repair line can be selectively connected to different data lines through connection nodes, enabling a single repair line to repair multiple different data lines depending on which ones are broken.
Solution Approach 2:
The patent implements dynamic connectivity where connection nodes can selectively connect different repair lines to different data lines based on which data lines are broken. This dynamic reconfiguration allows the repair system to adapt to various failure patterns and repair multiple data lines using the same repair infrastructure.
3Ease of manufacture
If patterned floating lines are disposed in the same layer as scan lines, then laser welding can be performed, but the floating lines cannot be disposed on the intersection of data line and scan line
Solution Approach 1:
The patent resolves the layer conflict by routing repair lines and connection nodes in alternative paths that avoid the intersection area of data lines and scan lines. The repair network operates in a different spatial dimension or layer configuration, allowing laser welding to be performed on floating lines without interfering with the intersection of data and scan lines.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design enables efficient repair of broken data lines and scan lines, maintaining display quality by ensuring adjacent pixels display the same color, thus enhancing the yield and reliability of the pixel array substrate.
Implementation Method 1
two ends of the broken data line 120 can be welded to the repair line 150 by using laser welding for forming two welding portions 124
Data Source
AI summary
This present invention discloses a pixel array substrate including a substrate, a plurality of scan lines, a plurality of data lines, a plurality of active elements, a plurality of pixel electrodes, a plurality of first patterned floating lines, and a plurality of first patterned connecting wires. A plurality of pixel fields are formed by the cross scan lines and data lines, and each active element is electrically connected with the corresponding scan line, data line and pixel electrode. Each first patterned floating line is overlapped with some data lines. Each first patterned connecting wire is disposed across some scan lines, and disposed overlapped the first patterned floating lines disposed on the two sides of the scan line.