Double Branch Data Line Structure for LCD Repair
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Solution Overview
Problem
Liquid crystal display (LCD) devices experience a high occurrence of disconnection defects in areas where data lines overlap with gate lines and are near thin film transistors, requiring additional repair schemes.
Innovation Solution
A display device design featuring a data line with a double branch line structure forming a closed loop, where the first and second branch lines overlap the gate line and are connected to source electrodes of thin film transistors, allowing for easier repair of disconnection defects by forming a semicircular groove in the branch lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single data line structure is used, then the device complexity is low, but the reliability is poor due to high disconnection defects in overlapping areas
Solution Approach 1:
The data line is segmented into multiple branch lines (first branch line and second branch line) that form a closed loop structure. This segmentation allows the data signal to be transmitted through multiple separate paths, reducing the probability of complete signal failure and improving overall connection reliability.
Solution Approach 2:
The closed loop structure of the data line provides redundant pathways before disconnection can occur. If one branch line experiences a disconnection defect, the other branch line continues to transmit signals, cushioning against total failure and maintaining device operation.
2Ease of repair
If a double branch line structure is used, then the ease of repair is improved, but the device complexity increases
Solution Approach 1:
The data line is divided into separate branch lines that form a closed loop, allowing technicians to identify and repair specific disconnected segments without replacing the entire data line structure. This segmentation facilitates targeted repair efforts.
Solution Approach 2:
Instead of attempting to prevent all disconnection defects, the design accepts that disconnections may occur and inverts the approach by creating a structure where disconnections can be easily detected and repaired through the closed loop configuration, which provides clear identification of affected segments.
Data Source
AI summary
A display device including a substrate, a gate line, a data line, a plurality of thin film transistors, a first pixel electrode, and a second pixel electrode. The gate line is disposed on the substrate. The data line is disposed on the substrate. The data line includes a first branch line and a second branch line. The first branch line and the second branch line form a closed loop. The plurality of thin film transistors is connected to the data line. The first pixel electrode is connected to at least one of the plurality of thin film transistors. The second pixel electrode is connected to at least another one of the plurality of thin film transistors. The first pixel electrode and the second pixel electrode are arranged in a substantially diagonal direction with respect to each another. The first branch line is connected to a source electrode of said at least one of the plurality of thin film transistors. The second branch line is connected to a source electrode of said at least another one of the plurality of thin film transistors.