LCD Array Substrate Multi-Branch Data Line Repair
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Solution Overview
Problem
Conventional liquid crystal display (LCD) array substrates face issues with line defects during manufacturing, requiring additional space for repair lines and experiencing signal distortion due to high electrical resistance in repair lines.
Innovation Solution
The array substrate incorporates data lines with multiple branches that are electrically connected, allowing for efficient repair of defects without the need for additional space, with repair lines disposed in parallel to scan lines and connected to them to reduce electrical resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If repair lines are provided peripheral to the display region, then line defects can be repaired, but the area of the non-display region increases
Solution Approach 1:
The patent merges the repair line function with existing data lines by providing multiple branches (first branch and second branch) within the same data line structure. This eliminates the need for separate repair lines peripheral to the display region, as the repair capability is integrated into the data lines themselves, thus maintaining display region area while enabling defect repair.
Solution Approach 2:
The patent transitions from a peripheral repair line arrangement (external to data lines) to an integrated multi-branch structure (internal to data lines). By embedding repair functionality within the data line dimension rather than adding it externally, the non-display region area is preserved while repair capability is maintained.
2Reliability
If repair lines are used to repair defects, then line defects can be corrected, but the electrical resistance is relatively large causing signal distortion
Solution Approach 1:
The patent combines multiple data line branches (first branch and second branch) to work together in repairing defects. This merged structure provides redundant signal transmission paths, reducing the electrical resistance impact compared to single repair lines, thereby minimizing signal distortion while maintaining repair capability.
3Reliability
If repair lines are provided, then line defects can be repaired, but additional space is required reducing display area
Solution Approach 1:
The patent merges repair functionality into the existing data line structure by creating multiple branches within the same line. This integration eliminates the need for separate repair lines that would occupy additional space, thereby preserving the display area while maintaining the ability to repair line defects.
Solution Approach 2:
The data lines are designed with multi-functionality, serving both as signal transmission paths and as integrated repair structures. The first branch and second branch of each data line can function together for normal operation and for defect repair, eliminating the need for dedicated repair lines and preserving display area.
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 solution enables effective defect repair with minimal impact on display area and reduced signal distortion, maintaining the integrity of data transmission while minimizing the length and resistance of repair lines.
Implementation Method 1
the front data line portion 122a and a repair line 223 are connected at the crossing point A, and the end data line portion 122c and the repair line 223 are connected at the crossing point B by laser melting
Data Source
AI summary
An array substrate of a liquid crystal display, comprising a first scan line and a second scan line, a first data line and a second data line arranged crossing with the first scan line and the second scan line to define a pixel region, and a pixel electrode in the pixel region, wherein the second data line comprises at least a first branch and a second branch that are electrically connected to each other. According to the invention, it is not necessary to provide the array substrate with additional space for disposing repair lines, and the non-display region is therefore not increased, resulting in an increased yield. Only a short length of repair lines is used in repair, and thus both electrical resistance of repair line and distortion of data signals can be reduced.