Display Substrate ESD Structure for Stable Signal Lines
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Solution Overview
Problem
Display devices, such as LCDs, are prone to static electricity generation during production and application, which affects signal line transmission and can lead to signal deviations and breakage, compromising the stability and normal operation of the device.
Innovation Solution
A display substrate with a peripheral region containing electrostatic discharge structures, including multiple electrostatic discharge patterns and electrodes, is designed to discharge static electricity from signal lines, ensuring stable signal transmission by forming capacitor structures and utilizing conductive materials for efficient charge transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrostatic discharge structures are added to protect signal lines, then the reliability of signal transmission is improved, but the device complexity increases
Solution Approach 1:
The electrostatic discharge structure is nested within the existing display substrate architecture by integrating multiple patterns (first electrostatic discharge pattern, second electrostatic discharge pattern, third electrostatic discharge pattern) across different layers. These patterns are embedded within the peripheral region alongside existing signal lines, allowing the ESD protection function to be added without fundamentally redesigning the overall device structure.
Solution Approach 2:
The solution transitions from a two-dimensional planar layout to a three-dimensional multi-layer structure by arranging electrostatic discharge patterns in different layers (first layer, second layer, third layer) with vertical stacking. The first electrostatic discharge pattern is in a first layer, the second electrostatic discharge pattern is in a second layer below it, and the third electrostatic discharge pattern is in a third layer, utilizing the vertical dimension to provide comprehensive ESD protection while maintaining a compact footprint.
2Reliability
If multiple electrostatic discharge patterns are arranged in different layers, then the electrostatic discharge effectiveness is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The electrostatic discharge patterns are pre-configured in specific layers during the manufacturing process, with the first electrostatic discharge pattern formed in the first layer, the second electrostatic discharge pattern formed in the second layer, and the third electrostatic discharge pattern formed in the third layer. This preliminary arrangement ensures that when static electricity occurs, the discharge paths are already established through the multi-layer structure, improving discharge effectiveness while allowing standard manufacturing tolerances to be maintained.
3Reliability
If electrostatic discharge structures are integrated in the peripheral region, then the signal line protection is improved, but the area available for other components is reduced
Solution Approach 1:
The electrostatic discharge structures are localized specifically to the peripheral region where signal lines are located, rather than distributing ESD protection elements across the entire display substrate. The first electrostatic discharge pattern, second electrostatic discharge pattern, and third electrostatic discharge pattern are arranged in the peripheral region to provide targeted protection where it is most needed, minimizing the impact on the area available for display elements while maximizing protection effectiveness for the signal lines.
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 electrostatic discharge structures effectively prevent static electricity accumulation on signal lines, ensuring stable and accurate signal transmission and improved working stability of the display device.
Implementation Method 1
a first insulating layer is arranged between the second electrostatic discharge pattern and the first electrostatic discharge pattern, so as to insulate the first electrostatic discharge pattern from the second electrostatic discharge pattern
Implementation Method 2
at least one electrostatic discharge structure for performing electrostatic discharge on the signal lines
Data Source
AI summary
The present disclosure provides a display substrate and a display device. A display substrate provided by an embodiment of the present disclosure includes: a display region and a peripheral region surrounding the display region; the display region includes: a plurality of gate lines, a plurality of data lines, and a plurality of pixel units, and each of the plurality of pixel units includes a driving transistor and a pixel electrode that are connected to each other; the peripheral region includes: signal lines and at least one electrostatic discharge structure for performing electrostatic discharge on the signal lines, and the electrostatic discharge structure includes a comb-shaped sixth electrostatic discharge pattern and a seventh electrostatic discharge pattern.