Antistatic Element Design for Static Electricity Dispersion in Display Devices
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Solution Overview
Problem
Display devices, particularly LCDs, are vulnerable to damage from static electricity, which can be induced on the substrate and introduced into the display panel, leading to potential damage of the display elements.
Innovation Solution
A display device design that includes an electrostatic dispersion line and an antistatic element with a discharge gate electrode, semiconductor layer, source electrode, and drain electrode, along with an electric field protection layer, which disperses static electricity in two opposite directions, preventing damage to the display elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an electrostatic dispersion line and antistatic element are added to protect display elements from static electricity, then reliability is improved, but device complexity increases
Solution Approach 1:
The protection system is segmented into multiple functional components: electrostatic dispersion lines extending in first and second directions, and antistatic elements positioned at intersections of gate lines and data lines. Each component performs a specific function in the static electricity protection pathway, allowing the system to handle complex protection needs through modular, distributed elements rather than a single complex structure.
Solution Approach 2:
The antistatic element acts as an intermediary component between the gate line/data line and the display element. It includes a discharge gate electrode, discharge semiconductor layer, discharge source electrode, and discharge drain electrode that collectively mediate the discharge of static electricity, protecting the vulnerable display element while adding controlled complexity only where needed at intersection points.
2Reliability
If antistatic elements are placed at multiple intersections of gate lines and data lines, then protection coverage is improved, but manufacturing complexity increases
Solution Approach 1:
The antistatic element structure is designed as a universal, standardized component that can be replicated at any intersection of gate lines and data lines. The same configuration of discharge gate electrode, discharge semiconductor layer, discharge source electrode, and discharge drain electrode performs the same protection function at each location, allowing consistent manufacturing processes to be applied across the entire display panel without requiring different structures for different positions.
Solution Approach 2:
Protection is applied locally at specific high-risk locations where gate lines and data lines intersect, rather than uniformly across the entire display panel. The antistatic elements are strategically positioned only at these intersection points where static electricity discharge is most likely to occur and cause damage, optimizing protection coverage while minimizing the total number of protective components that would complicate manufacturing.
3Area of moving object
If the discharge gate electrode width is reduced, then area is saved, but discharge capability may be compromised
Solution Approach 1:
The discharge gate electrode is designed with a width smaller than the discharge source and discharge drain electrodes, creating an asymmetric structure where the gate electrode has reduced width in the horizontal direction but maintains adequate discharge capability through its vertical extent and overlapping configuration with the discharge semiconductor layer. This dimensional optimization saves area while preserving function.
Solution Approach 2:
The electrode dimensions are optimized by changing the width parameter of the discharge gate electrode to be smaller than the discharge source and drain electrodes. This parameter change reduces the area occupied by the gate electrode while the overall discharge capability is maintained through the coordinated dimensions of all electrodes in the antistatic element structure.
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
Effectively prevents damage to the display elements by dispersing static electricity, minimizing the impact of external electric fields and ensuring the stability and functionality of the display device.
Implementation Method 1
an antistatic element connected to the electrostatic dispersion line... the antistatic element includes an discharge gate electrode, a discharge semiconductor layer on the discharge gate electrode... one of the discharge source electrode and the discharge drain electrode is connected to the electrostatic dispersion line
Implementation Method 2
an electric field protection layer on the antistatic element... the electric field protection layer overlaps the discharge gate electrode... may have an electric potential substantially equal to an electric potential of the electrostatic dispersion line
Data Source
AI summary
A display device includes: a first substrate including display and non-display areas; gate and data lines on the first substrate and crossing each other; an electrostatic dispersion line on the non-display area; an antistatic element including an discharge gate electrode, a discharge semiconductor layer on the discharge gate electrode and overlapping at least a portion of the discharge gate electrode, and a discharge source and drain electrodes a on the discharge semiconductor layer, spaced apart from each other and overlapping at least a portion of the discharge gate electrode; and an electric field protection layer on the antistatic element and overlapping the discharge gate electrode. One of the discharge source and drain electrodes is connected to the electrostatic dispersion line and the other of the discharge source and drain electrodes is connected to one of the gate line and the data line.