Display Panel Repair Lines for Scan and Data Line Bridging
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Solution Overview
Problem
Existing display panels face issues with poor conduction due to floating particles, particularly affecting in-cell traces, and existing repair methods can only repair one or two data lines, cannot repair scan lines, and require longer repair lines that lead to signal attenuation and increased manufacturing costs.
Innovation Solution
A display panel design featuring first and second repair lines disposed beside scan and data lines respectively, allowing for bridging of opened lines to form electroconductive pathways using laser bonding, enabling repair of both scan and data lines without incorporating repair lines into the pathways to avoid short-circuiting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If traditional repair methods are used with repair lines running through the display panel, then repair capability is provided, but signal attenuation increases and operation amplification is required
Solution Approach 1:
The repair line is segmented into two separate portions: a first portion extending from a first end of the opened trace to a first location outside the active area, and a second portion extending from a second end of the opened trace to a second location outside the active area. These portions are connected through bonding pads located outside the active display area, avoiding the need for the repair line to traverse the entire active area and reducing signal attenuation.
Solution Approach 2:
Bonding pads are introduced as intermediary elements to connect the first and second portions of the repair line. These bonding pads are located outside the active area and serve as connection points that eliminate the need for the repair line to pass through the active display region, thereby reducing signal loss and eliminating the requirement for operation amplification.
2Ease of repair
If repair lines are incorporated into electroconductive pathways, then repair capability is achieved, but short-circuiting risk increases
Solution Approach 1:
The critical connection points (bonding pads) of the repair line are extracted from the active area and placed in the inactive area surrounding the display panel. This separation ensures that the repair line does not intersect with or interfere with the electroconductive pathways in the active region, eliminating the risk of short-circuiting while maintaining repair functionality.
Solution Approach 2:
The repair line is divided into separate portions that connect to the opened trace ends individually, with the connection points located outside the active area. This segmentation isolates the repair functionality from the active electroconductive pathways, preventing potential short-circuits while enabling effective repair of opened traces.
3Ease of repair
If existing repair methods are used, then data line repair is possible, but scan line repair capability is lacking
Solution Approach 1:
The repair line structure is designed with universal applicability to both scan lines and data lines. The same configuration of repair lines extending to bonding pads outside the active area can be used for repairing either scan lines or data lines, providing versatile repair capability across different trace types without requiring separate repair mechanisms.
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 enhances repair capacity, reduces signal attenuation, and eliminates the need for operation amplification, thereby improving manufacturing efficiency and cost-effectiveness by allowing simultaneous repair of both scan and data lines with equal-length repair lines.
Implementation Method 1
bridging the scan line or the data line with the corresponding first repair line and second repair line by way of laser bonding
Data Source
AI summary
A display panel comprises a first substrate, a second substrate, and an active switch matrix. The first substrate comprises color resistor units, and the second substrate is disposed opposite to the first substrate. The active switch matrix is disposed on the first substrate or the second substrate. The active switch matrix comprises scan lines and data lines. A first repair line is disposed on one side of at least one of the scan lines, and a second repair line is disposed on one side of at least one of the data lines.