Rectangular Repair Lines for LCD Line Defect Bypass
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Solution Overview
Problem
Conventional LCD panels face issues with line defects in wiring patterns, leading to image signal delays and quality reduction due to lengthy repair lines with high resistance and capacitance, and limited repair line placement due to size constraints.
Innovation Solution
The implementation of substantially rectangular-shaped, electrically isolated repair lines that surround data or gate lines between pixel electrodes, allowing for efficient electrical connection via laser fusing to bypass defects without adding significant size or signal delay.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional lengthy repair lines are used to bypass line defects, then line defects can be repaired, but signal delay increases and image quality deteriorates
Solution Approach 1:
The repair line is segmented into multiple separate repair lines, each associated with specific pixel regions. This allows selective activation of only the necessary repair line segments, minimizing the total path length and reducing signal delay while maintaining repair capability.
Solution Approach 2:
Each repair line is locally positioned adjacent to specific pixel regions where defects occur. The repair lines are strategically placed to provide minimal bypass paths for defects in their neighboring pixel regions, optimizing the balance between repair effectiveness and signal delay.
2Reliability
If repair lines are added to enable defect repair, then line defects can be addressed, but panel size increases
Solution Approach 1:
The repair lines are nested within or adjacent to the existing pixel region boundaries, utilizing the existing panel structure. The repair lines are positioned in the gaps between pixel regions, effectively using unused space without increasing the overall panel area.
Solution Approach 2:
The repair lines are positioned in the vertical dimension between pixel rows, utilizing the space between adjacent pixel regions. This dimensional arrangement allows multiple repair lines to be packed into the panel without increasing the horizontal panel size.
3Area of stationary object
If the number of repair lines is limited due to panel size constraints, then panel size is controlled, but repair capability is reduced
Solution Approach 1:
Each repair line is designed to serve multiple pixel regions by extending across multiple rows. A single repair line can repair defects in multiple adjacent pixel regions, maximizing the utility of each repair line and compensating for the limited total number of repair lines.
Solution Approach 2:
The repair lines are configured to be selectively activated based on defect detection. Not all repair lines need to be physically present or activated simultaneously; the system dynamically selects and activates only the necessary repair lines for the detected defect location, optimizing the balance between panel size and repair capability.
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 configuration enables effective repair of line defects without signal delay and allows for more flexible placement of repair lines, maintaining image quality and reducing the limitations imposed by panel size.
Implementation Method 1
the broken data line 121 and the repair line 161 can be connected at their two points of intersection (not labeled) by laser fusing or other known techniques
Data Source
AI summary
An exemplary liquid crystal display panel (2) includes a plurality of gate lines (21), a plurality of data lines (22), a plurality of pixel regions, and a plurality of repair lines (24). Each pixel region is surrounded by two corresponding gate lines and two corresponding data lines, and each pixel region includes a pixel electrode (20). Each repair line is provided at a respective one of the pixel regions. Each repair line is a substantially rectangular-shaped ring, two opposite long sides of the ring are located at two opposite sides of a corresponding data line or a corresponding gate line between two corresponding adjacent pixel electrodes, two opposite short sides of the ring cross the corresponding data line or gate line, and the repair line is electrically isolated from the corresponding data line or gate line. A method for repairing the liquid crystal display panel is also provided.