Carbon Nanotube Touch Panel for LCD Durability
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Solution Overview
Problem
Conventional resistance-type touch panels using indium tin oxide (ITO) layers suffer from poor durability, low chemical endurance, and uneven resistance, leading to low sensitivity and short lifetime in liquid crystal display screens.
Innovation Solution
The use of carbon nanotube-based conductive layers, either pure or composite, with aligned carbon nanotubes and infiltrated polymers, replaces traditional ITO layers to enhance durability, sensitivity, and uniformity, improving the touch panel's performance and longevity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ITO layers are used for transparent conductive layers in touch panels, then the touch panel can be manufactured with conventional methods, but the ITO layer exhibits poor wearability, low chemical endurance, and uneven resistance
Solution Approach 1:
The patent changes the material parameters by replacing ITO with carbon nanotube-based conductive layers, which have superior mechanical strength, chemical endurance, and uniform resistance characteristics while maintaining transparency and conductivity required for touch panel operation
Solution Approach 2:
The patent employs composite materials by combining carbon nanotubes with transparent polymers to create a conductive layer that integrates the electrical conductivity of carbon nanotubes with the optical transparency and mechanical flexibility of polymer matrices, achieving both durability and ease of manufacture
2Measurement precision
If ITO layers are used for transparent conductive layers, then the manufacturing process can be simplified, but the touch panel sensitivity and lifetime are reduced
Solution Approach 1:
The patent optimizes the structural parameters of the conductive layer by using aligned carbon nanotube arrangements within polymer matrices, which provide both high touch sensitivity through uniform electrical properties and extended lifetime through enhanced mechanical and chemical stability
Solution Approach 2:
The composite structure of carbon nanotubes embedded in transparent polymers provides synergistic effects where carbon nanotubes deliver superior electrical conductivity and wear resistance for enhanced sensitivity and longevity, while the polymer matrix provides chemical endurance and structural integrity
Data Source
AI summary
A liquid crystal display screen includes an upper component, a bottom component and a liquid crystal layer. The upper component includes a touch panel. The touch panel includes a first conductive layer. The first conductive layer includes a transparent carbon nanotube structure. The bottom component includes a thin film transistor panel. The thin film transistor panel includes a plurality of thin film transistors. Each of the plurality of thin film transistors includes a semiconducting layer, and the semiconducting layer includes a semiconducting carbon nanotube structure. The liquid crystal layer is located between the upper component and the lower component.