Heterogeneous Jumping Wiring for Display Panel Static Protection
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Solution Overview
Problem
Conventional display panels are prone to damage due to static electricity generated during the array test process, which flows into the panel through test wiring and connection wiring, causing defects in the internal wirings of the thin film transistor.
Innovation Solution
A display panel design incorporating a jumping wiring made of a heterogeneous material, such as a combination of metal and oxide (ZnO:Al or SnO2:Sb), is introduced between the signal pad and the test wiring to induce a discharge of static electricity, preventing damage by connecting the signal pad with the test wiring portion and potentially including additional connection wirings formed of the same material as the signal and test wiring portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If test wiring and connection wiring are formed of metal material to enable array testing, then electrical connectivity for testing is improved, but static electricity flows into the panel causing damage to internal wirings
Solution Approach 1:
A jumping wiring made of transparent conductive oxide material (such as ITO, IZO, or In-Sn-O-Zn-O) is introduced as an intermediary component between the metal test wiring and the panel's internal signal lines. This intermediate layer with different electrical properties blocks static electricity while maintaining normal test signal transmission, thus preventing damage without compromising test functionality.
Solution Approach 2:
The patent employs a composite wiring structure combining metal materials (for test wiring and connection wiring) with transparent conductive oxide materials (for jumping wiring). This composite approach leverages the high conductivity of metals for test signals while using the oxide material's different electrical characteristics to disrupt static electricity flow, achieving both test functionality and protection.
2Object-affected harmful factors
If heterogeneous material (metal and oxide combination) is used for jumping wiring, then static electricity discharge is induced, but manufacturing complexity increases
Solution Approach 1:
The jumping wiring is merged with existing wiring layers in the panel structure, forming an integrated multi-layer wiring system. The transparent conductive oxide jumping wiring is combined with metal test wirings and connection wirings in a unified structure, achieving static electricity protection without requiring separate standalone components or complex external systems.
Solution Approach 2:
The patent changes the electrical parameters of the wiring system by introducing materials with different conductivity characteristics. The transparent conductive oxide material has different electrical properties compared to metal, creating impedance discontinuity that disrupts static electricity flow while allowing normal test signals to pass through, thus achieving protection through parameter variation rather than structural complexity.
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 heterogeneous jumping wiring effectively disrupts the flow of static electricity, preventing damage to the display panel by electrically short-circuiting due to conductivity differences, thus safeguarding the panel from static electricity-induced defects.
Implementation Method 1
The heterogeneous jumping wiring effectively disrupts the flow of static electricity, preventing damage to the display panel by electrically short-circuiting due to conductivity differences
Data Source
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AI summary
Disclosed is a display panel in which a jumping wiring (230; 530, 530') made of a heterogeneous material for the prevention of static electricity connects a signal pad (210; 510) with a test wiring (220, 220'; 520, 520') of an array substrate, or a display panel, and induces a discharge of the static electricity when the static electricity generated in an array test process flows into the display panel, thereby preventing damage to the display panel.