Active Matrix Substrate Laser Repair for Broken Lines
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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 repair method that includes inspecting for broken lines and forming repair sections using laser radiation and nano metal solution to reconnect broken lines, ensuring continuous signal transmission and improving yield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If gate lines and source lines are made long to cover the entire display panel, then the display area is increased, but the probability of broken lines increases
Solution Approach 1:
The patent introduces repair lines (first repair lines and second repair lines) that are segmented and distributed across the display panel. These repair lines are activated selectively based on detected broken lines, allowing the system to maintain reliability without reducing the display area. The segmentation principle is applied by dividing the repair function into multiple independent repair lines rather than using a single long repair line.
Solution Approach 2:
The patent implements preliminary action by pre-configuring repair lines and switch devices before any broken line occurs. The control circuit is designed to detect broken lines and activate appropriate repair lines in advance, rather than waiting for failure and then attempting repair. This preliminary preparation ensures that reliability can be restored quickly without affecting display area.
2Productivity
If repair lines are added to fix broken lines, then manufacturing yield is improved, but device complexity increases
Solution Approach 1:
The repair lines serve multiple functions: they can repair broken gate lines, broken source lines, and even other repair lines. The switch devices connected to repair lines can redirect signals to different destinations based on which line is broken. This multi-functionality allows the patent to improve manufacturing yield without proportionally increasing complexity, as the same repair infrastructure handles multiple failure modes.
Solution Approach 2:
The patent introduces switch devices as intermediaries between the repair lines and the pixel electrodes. These switch devices act as mediators that selectively connect repair lines to different target lines based on detected failures. This intermediary approach simplifies the control logic compared to direct hard-wired repairs, as the switches can be controlled programmatically to handle various failure scenarios.
3Adaptability or versatility
If switch devices are connected to multiple lines for repair purposes, then repair capability is enhanced, but the risk of signal interference increases
Solution Approach 1:
The patent implements dynamics by making the connection topology changeable through controllable switch devices. The switches can dynamically alter which repair line is connected to which target line based on real-time detection results. This dynamic reconfiguration allows the system to adapt to different failure scenarios while maintaining signal integrity, as only the necessary connections are activated at any given time rather than all connections being permanently active.
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
The repair method effectively addresses line defects by reconnecting broken lines, enhancing the manufacturing yield and reducing signal delay, allowing for smoother signal transmission and improved display performance.
Implementation Method 1
forming repair sections using laser radiation and nano metal solution to reconnect broken lines
Implementation Method 2
forming repair sections using laser radiation and nano metal solution to reconnect broken lines
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 extended in parallel to each other; first source line respectively disposed between the pixel electrodes and extended in a direction crossing the first gate lines; capacitor lines respectively disposed between the first gate lines and extended in nonparallel to from 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. The first gate lines, capacitor lines, first source lines, second gate lines, capacitor lines and second source lines are not in electrical connection with each other.