Display Panel Repair Line and Compensation Line Design
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Solution Overview
Problem
In display panel production, defective panels with broken data lines due to manufacturing issues are typically scrapped, leading to cost waste, as existing repair methods result in lower brightness and poor screen display effects due to increased capacitance and resistance from repair lines.
Innovation Solution
A display panel design incorporating repair lines and compensation lines connected through resistors, with the data driver adjusting signal output to optimize voltage transfer, reducing RC delay and improving charging rates of sub-pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a repair line is connected to a broken data line to restore connectivity, then the data line can transmit signals again, but the capacitance and resistance increase resulting in lower charging rate and reduced brightness
Solution Approach 1:
The patent divides the repair function into two separate components: a repair line for restoring connectivity and a compensation line for improving signal quality. The compensation line is connected through a resistor to the repair line, creating a segmented structure that addresses both connectivity and performance issues independently. This segmentation allows the system to benefit from both the repair line's connectivity restoration and the compensation line's signal enhancement without the adverse effects of a single integrated repair line.
Solution Approach 2:
The patent introduces a resistor as an intermediary component between the repair line and the compensation line. This resistor mediates the connection, allowing the compensation line to provide additional signal paths and reduce the overall capacitance and resistance of the repaired data line. The intermediary resistor enables controlled signal transfer and helps optimize the charging rate of sub-pixels connected to the repaired data line.
2Productivity
If a repair line is added to fix broken data lines, then defective panels can be rescued from scrapping, but the RC delay increases reducing the charging rate of sub-pixels
Solution Approach 1:
The patent segments the repair functionality into a repair line for basic connectivity and a separate compensation line for performance optimization. This segmentation allows the system to achieve both high yield rate (by restoring connectivity to defective panels) and acceptable charging rate (by using the compensation line to reduce RC delay through additional signal paths and the resistor intermediary).
Solution Approach 2:
The patent changes the electrical parameters of the repaired data line by introducing a compensation line connected through a resistor. This configuration modifies the overall capacitance and resistance values, specifically reducing the RC delay product. The resistor value and compensation line characteristics are optimized to improve the charging rate of sub-pixels while maintaining the connectivity restoration function of the repair line.
3Ease of repair
If a repair line overlaps with data lines to provide backup connection, then broken lines can be repaired, but the capacitance increases leading to lower brightness in repaired sections
Solution Approach 1:
The patent separates the repair function (repair line overlapping with data lines) from the performance optimization function (compensation line connected through resistor). This segmentation allows the repair line to provide ease of repair through its overlapping structure, while the compensation line addresses the brightness issue by reducing capacitance effects through the resistor intermediary and providing additional signal paths.
Solution Approach 2:
The resistor serves as an intermediary that decouples the capacitance effects of the overlapping repair line from the signal transmission path. By connecting the compensation line through this resistor, the system can maintain the repairability provided by the overlapping repair line structure while mitigating its adverse capacitance effects on brightness through the compensation line's additional signal paths.
Data Source
AI summary
A display panel includes a substrate, a plurality of data lines, at least one repair line, at least one compensation line and a data driver. The repair line is arranged on the substrate and overlapped with at least part of the plurality of data lines, for connecting with a broken data line when the broken data line with a breakpoint exists in the plurality of data lines, to repair the broken data line. Each compensation line is connected to the repair line through a resistor. The data driver includes a plurality of first output channels connected to the plurality of data lines, at least one second output channel connected to an end of the repair line away from the resistor and at least one third output channel connected to an end of the compensation line away from the resistor.