Array Substrate Shield Electrode Design for Light Leakage Prevention
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Solution Overview
Problem
Existing H-ADS and S-ADS type array substrates face challenges in preventing light leakage and manufacturing complexity due to the wide shield electrodes required to shield electromagnetic signals, which increase the pixel pitch and manufacturing difficulty.
Innovation Solution
The array substrate design includes a first shield electrode in the same layer as the pixel electrode, closer to the data signal line, reducing the distance and width of the shield electrode, and optionally a second shield electrode connected to the common electrode to apply signals, thereby reducing light leakage and manufacturing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the width of the shield electrode is increased to better shield electromagnetic signals, then the shielding effect is improved, but the slit width of the common electrode decreases and manufacturing complexity increases
Solution Approach 1:
The patent introduces a new spatial dimension by adding a second shield electrode in a different layer (the fifth layer) rather than simply widening the shield electrode in the same layer. This vertical layering approach provides additional shielding capability without increasing the horizontal width, thereby maintaining the slit width of the common electrode and reducing manufacturing complexity while improving the overall shielding effect through multi-layer electromagnetic signal blocking
2Reliability
If the width of the shield electrode is increased to prevent light leakage, then the shielding effect is improved, but the pixel pitch decreases and manufacturing difficulty increases
Solution Approach 1:
The patent resolves this contradiction by transitioning from a single-layer wide shield electrode to a multi-layer configuration with narrower shield electrodes stacked vertically. The first shield electrode in the third layer and the second shield electrode in the fifth layer work together to prevent light leakage and electromagnetic interference, while their reduced individual widths preserve the pixel pitch and simplify manufacturing precision requirements
3Reliability
If the distance between the shield electrode and data signal line is increased to improve shielding, then the shielding effect is improved, but the shield electrode width must be increased which reduces the common electrode slit width
Solution Approach 1:
The patent introduces vertical layering as an additional dimension for shielding, placing shield electrodes in the third and fifth layers at optimized distances from the data signal line. This multi-layer approach provides cumulative shielding effect without requiring any single shield electrode to be excessively wide, thereby preserving the common electrode slit width while achieving effective electromagnetic signal shielding
Solution Approach 2:
The patent introduces insulating layers as intermediary elements between the data signal line and the shield electrodes. These insulating layers (second insulating layer and fourth insulating layer) provide electrical isolation and allow the shield electrodes to be positioned at optimal distances for shielding effectiveness without direct contact, enabling better shielding geometry without increasing shield electrode width
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 design effectively prevents light leakage and alleviates color mixing, decreases the shield electrode's width and occupancy, and simplifies the manufacturing process by allowing a wider slit for the common electrode and reducing the number of signal lines needed.
Implementation Method 1
a first shield electrode, which is provided in the same layer as the pixel electrode and is insulated from the pixel electrode, wherein an orthographic projection of the first shield electrode on the base substrate covers the orthographic projection of the data signal line on the base substrate
Implementation Method 2
the orthographic projection of the first shield electrode on the base substrate covers the orthographic projection of the data signal line on the base substrate, so as to shield the electromagnetic signals in the data signal line 3
Data Source
AI summary
The invention discloses an array substrate, a liquid crystal display panel and a display device, since the first shield electrode, which intents to shield instantaneous electromagnetic signals in a data signal line, and a pixel electrode are provided in the same layer, compared to the existing array substrate in which the shield electrode and a common electrode are provided in the same layer, since the pixel electrode is closer to the data signal line, through the first shield electrode, the light leakage phenomenon can be effectively prevented from occurring in the array substrate, and the color mixing phenomenon of the array substrate can be alleviated, and further the distance between the first shield electrode provided in the same layer as the pixel electrode and the data signal line can be decreased, and the width of the first shield electrode is decreased.