Floating Conductive Layer for Electrostatic Discharge in Displays
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Solution Overview
Problem
Static electricity flowing into display devices can cause damage to elements such as thin-film transistors, leading to defects and deterioration of image quality.
Innovation Solution
A display device design that includes a conductive layer and a dummy wire, both electrically floated and strategically positioned to form capacitors that store and discharge static electricity, preventing it from reaching sensitive components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conductive layer is added to protect against static electricity, then reliability is improved, but device complexity increases
Solution Approach 1:
The conductive layer serves multiple functions: it acts as an electrostatic protection layer to prevent damage from static electricity, while also serving as part of the display device's structural architecture. This multi-functionality resolves the contradiction by adding protection without proportionally increasing complexity.
Solution Approach 2:
The conductive layer acts as an intermediary element between the first substrate and second substrate, providing electrostatic protection to sensitive components while being integrated into the existing device architecture. This mediator approach allows protection to be added without fundamentally redesigning the device structure.
2Reliability
If a conductive layer is disposed between substrates, then protection against static electricity is improved, but manufacturing precision requirements increase
Solution Approach 1:
The conductive layer is strategically positioned to overlap with conductive lines in the non-display area where static electricity protection is most needed, rather than requiring uniform coverage throughout the entire device. This localized approach reduces manufacturing precision requirements while maintaining effective protection.
Solution Approach 2:
The conductive layer at least partially overlaps the conductive line, providing protection where it is most critical without requiring precise alignment across the entire device. This partial overlap approach ensures adequate protection while tolerating variations in manufacturing precision.
3Reliability
If dummy wires are added to discharge static electricity, then reliability is improved, but device complexity increases
Solution Approach 1:
The dummy wires are extracted as separate, dedicated elements specifically for electrostatic discharge functionality, distinct from the main signal and power lines. This separation allows the discharge function to be added without complicating the existing circuit design.
Solution Approach 2:
The dummy wires serve as simple, dedicated discharge paths that can be straightforwardly implemented without complex circuitry. They provide a reliable but simple mechanism for static electricity discharge, adding minimal complexity to achieve the protection function.
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 protects the display device from static electricity-induced damage, maintaining image quality and extending the lifespan of the device.
Implementation Method 1
The conductive layer may form a first capacitor, with the conductive line, and store static electricity flowing into the conductive layer.
Implementation Method 2
the conductive layer may form a second capacitor with the dummy wire, and static electricity stored in the second capacitor is discharged via the dummy wire.
Implementation Method 3
The conductive layer may include a transparent conductive layer arranged on an entire surface of the second substrate facing the first substrate.
Data Source
AI summary
A display device includes a first substrate having a display area and a non-display area. The first substrate includes a conductive line in the non-display area. A second substrate faces the first substrate and is spaced apart from the first substrate. A conductive layer is disposed between the first substrate and the second substrate. The conductive layer is spaced apart from the first substrate in a direction perpendicular to a top surface of the first substrate. The conductive layer at least partially overlaps the conductive line and is electrically floated.