Display Touch Conductive Patterns with MXenes for Lower RC Delay
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Solution Overview
Problem
Existing display devices face challenges with high resistive-capacitive (RC) delay due to parasitic capacitors and high resistance in touch panels, leading to low response speed and potential defects from thick touch insulating layers.
Innovation Solution
Incorporation of MXenes in the second conductive patterns within contact holes of the touch insulating layer, with varying concentrations in coating and via layers, to enhance conductivity and reduce RC delay.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a thick touch insulating layer is formed to improve RC delay, then resistive-capacitive delay is reduced, but defects occur due to non-contact phenomenon of the conductive layer
Solution Approach 1:
The patent introduces an intermediary material (conductive filler particles embedded in the touch insulating layer) to mediate between the touch insulating layer and the conductive layer below. This intermediary structure maintains electrical contact while allowing for a thicker insulating layer, thus reducing RC delay without causing non-contact defects.
Solution Approach 2:
The patent applies local quality by creating regions with different properties within the touch insulating layer. Specifically, conductive filler particles are locally distributed within the insulating layer to provide conductive pathways at critical contact points, while the rest of the layer maintains its insulating properties for RC delay reduction.
2Speed
If the touch insulating layer thickness is increased to reduce RC delay, then response speed improves, but the risk of conductive layer non-contact increases
Solution Approach 1:
The conductive filler particles serve as intermediary elements that bridge the gap between the thicker touch insulating layer and the underlying conductive layer. These particles maintain continuous conductive pathways even when the insulating layer is thick, ensuring reliable contact while enabling faster response speeds through reduced RC delay.
Solution Approach 2:
The patent creates a composite structure by combining the touch insulating layer with conductive filler particles embedded within it. This composite material simultaneously provides insulation properties for RC delay reduction and conductive pathways for maintaining contact continuity, thus improving response speed without sacrificing reliability.
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
Improves touch detection accuracy and response speed while minimizing defects by optimizing the conductive patterns within the touch insulating layer.
Implementation Method 1
second conductive patterns formed on the touch insulating layer and electrically connected to the first conductive pattern through the contact holes, wherein some of the second conductive patterns are formed inside the contact holes, and the second conductive patterns include MXenes
Data Source
AI summary
A display device includes: a substrate; pixels formed on the substrate; a base layer formed on the pixels; a first conductive pattern disposed on the base layer; a touch insulating layer formed on the base layer and the first conductive pattern and having contact holes that overlap portions of the first conductive pattern; and second conductive patterns formed on the touch insulating layer and electrically connected to the first conductive pattern through the contact holes, wherein some of the second conductive patterns are formed inside the contact holes, and the second conductive patterns include MXenes.