Active Matrix Substrate Broken Line Repair
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Solution Overview
Problem
The manufacturing yield of liquid crystal display devices is reduced due to defects such as broken lines in the gate and source lines on the active matrix substrate, leading to line defects on the display screen.
Innovation Solution
An active matrix substrate with a broken-line repair function, where additional lines and switch devices are integrated to form repair sections that can be electrically connected to broken lines using laser radiation and nano metal solutions, allowing for the repair of broken gate, source, and capacitor lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If gate lines and source lines are made very long to cover the display area, then the display area is increased, but the lines become more prone to breaking during manufacturing
Solution Approach 1:
The patent applies preliminary action by pre-configuring repair circuits and alternative signal paths during the manufacturing stage. Repair switches and capacitor lines are installed in advance, ready to activate if a gate line or source line breaks during operation or testing, thus preventing line integrity issues before they affect display functionality.
Solution Approach 2:
The patent introduces intermediary elements such as repair switches and capacitor lines that act as mediators between the broken gate lines/source lines and the pixel electrodes. These intermediaries provide alternative signal transmission paths, allowing the display to continue functioning even when primary lines are damaged.
2Ease of repair
If additional repair circuits and alternative lines are added to the substrate, then broken line repair capability is improved, but the device structure becomes more complex
Solution Approach 1:
The patent applies universality by designing repair circuits and alternative lines that can serve multiple functions. The same capacitor lines and repair switches can repair both gate lines and source lines, and can handle breaks at different locations across the display substrate, reducing the need for dedicated repair components for each line.
Solution Approach 2:
The patent utilizes parameter changes by modifying the electrical characteristics of certain lines. Capacitor lines are designed with different electrical parameters than regular gate or source lines, allowing them to function as repair paths while being distinguishable during manufacturing and operation. This enables the system to adapt its electrical parameters dynamically for repair purposes.
3Productivity
If repair sections are integrated into the substrate, then manufacturing yield is improved, but the manufacturing process becomes more difficult
Solution Approach 1:
The patent applies segmentation by dividing the repair function into separate, modular components: repair switches, capacitor lines, and alternative signal paths. These segmented repair elements can be manufactured and tested independently before being integrated into the final display substrate, simplifying the overall manufacturing process while improving yield.
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 improves the manufacturing yield of liquid crystal display devices by enabling the repair of broken lines, ensuring smooth signal transmission and reducing signal delay on the gate lines.
Implementation Method 1
laser radiation
Implementation Method 2
laser radiation
Implementation Method 3
nano metal solutions
Data Source
AI summary
The present disclosure illustrates an active matrix substrate includes pixel electrodes forming the pixels; first gate lines respectively disposed between the pixel electrodes; first source line respectively disposed between the pixel electrodes and extended in a direction crossing the first gate lines; first capacitor lines respectively disposed between the first gate lines and extended in nonparallel to one another; switch devices respectively disposed on the pixel electrodes; second source lines respectively disposed between the pixel electrodes and extended in parallel to the first source lines; second gate lines respectively disposed between the pixel electrode and extended in parallel to the first gate lines; and second capacitor lines respectively adjacent to the first capacitor lines and extended in nonparallel to the first capacitor lines. The first gate lines, first capacitor lines, first source lines, second gate lines, second capacitor lines and second source lines are isolated from each other.