Display Panel ESD Transistor Short Bar as Repair Line
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
LCD display panels face defects such as electrostatic discharge (ESD) damage and reduced yield due to manufacturing processes, and existing ESD protection circuits increase the non-display area, while reducing data line width leads to increased line resistance, affecting signal transfer.
Innovation Solution
A display panel design incorporating a short bar of an ESD protection transistor that also serves as a repair line for data line disconnections, with a thin film transistor and connected repair lines to maintain signal integrity and reduce non-display area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an ESD protection circuit is mounted on the substrate, then the display panel is protected from electrostatic discharge damage, but the non-display area increases
Solution Approach 1:
The patent combines the ESD protection circuit and repair line into a single integrated structure. The short bar of the ESD protection transistor serves dual purposes: protecting against ESD damage and functioning as a repair line for data line disconnections. This merging eliminates the need for separate ESD protection components, thereby reducing the non-display area while maintaining protection functionality.
Solution Approach 2:
The ESD protection transistor's short bar is designed to perform multiple functions simultaneously. It acts as both an ESD protection element and a repair line for data line defects. This multi-functionality allows the same structural element to address multiple potential failures without requiring additional dedicated components, thus minimizing the non-display area.
2Area of stationary object
If the data line width is reduced to decrease non-display area, then the non-display area is reduced, but the line resistance of the data line increases
Solution Approach 1:
The repair line acts as an intermediary pathway that can be activated when data line disconnection occurs. By having this备用 (backup) path integrated through the ESD protection transistor's short bar, the system can compensate for signal transfer issues in narrow data lines without requiring additional wide protective lines, thus maintaining signal integrity while keeping the non-display area minimal.
3Reliability
If separate ESD protection circuit and repair line are implemented, then both functions are provided, but the device complexity increases
Solution Approach 1:
The patent merges the ESD protection circuit and repair line into a single integrated structure. The short bar of the ESD protection transistor serves dual purposes: protecting against ESD damage and functioning as a repair line for data line disconnections. This merging eliminates the need for separate ESD protection components, thereby reducing the non-display area while maintaining protection functionality.
Solution Approach 2:
The ESD protection transistor's short bar is designed to perform multiple functions simultaneously. It acts as both an ESD protection element and a repair line for data line defects. This multi-functionality allows the same structural element to address multiple potential failures without requiring additional dedicated components, thus minimizing the non-display area.
Data Source
AI summary
A display panel has a substrate structure in which a short bar connected to a gate line of an electrostatic discharge protection transistor in a non-display area is also used as a repair line for reparing disconnection in a data line. The display panel is capable of protecting a driving circuit of the display panel from static electricity that may occur during a manufacturing process and has a reduced size of the non-display area by using the short bar as the repair line.