Carbon Nanotube Touch Panel for Uniform Resistance and Durability
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Solution Overview
Problem
Conventional resistance-type touch panels using indium tin oxide (ITO) layers suffer from poor durability, low sensitivity, accuracy, and brightness due to their wearability, chemical endurance, and uneven resistance issues, limiting their performance in electronic devices.
Innovation Solution
A touch panel design incorporating carbon nanotube structures as conductive layers, where carbon nanotube strip-shaped film structures are aligned orthogonally and connected to electrodes, providing improved mechanical strength, uniform conductivity, and optical transparency, enhancing sensitivity and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If indium tin oxide (ITO) layers are used as conductive layers in resistance-type touch panels, then the touch panel can be manufactured with conventional processes, but the durability and wearability are poor
Solution Approach 1:
The patent changes the material parameter from conventional ITO to carbon nanotube composite material, which fundamentally improves durability and wearability while maintaining manufacturing feasibility through solution-based processing methods
Solution Approach 2:
The patent uses composite materials consisting of carbon nanotubes dispersed in a polymer matrix, combining the excellent mechanical properties and electrical conductivity of carbon nanotubes with the processability of polymer materials to achieve both durability and ease of manufacture
2Measurement precision
If ITO layers are used in touch panels, then the conductive layer can be formed by ion-beam sputtering, but the resistance distribution is uneven and sensitivity is low
Solution Approach 1:
The patent changes the material composition to carbon nanotube-based composite, which inherently provides more uniform resistance distribution due to the excellent conductivity and dispersion characteristics of carbon nanotubes in the polymer matrix, thereby improving both manufacturing precision and measurement precision
3Reliability
If ITO layers are used as conductive layers, then the touch panel can be produced with standard processes, but the chemical endurance is low
Solution Approach 1:
The patent employs composite materials where carbon nanotubes are embedded in a chemically resistant polymer matrix, providing superior chemical endurance while maintaining compatibility with standard manufacturing processes through solution casting and lamination techniques
4Illumination intensity
If conventional ITO conductive layers are used, then the touch panel structure is simple, but the optical transparency and brightness capability are limited
Solution Approach 1:
The patent uses carbon nanotube-polymer composite materials that combine the optical transparency of the polymer matrix with the electrical conductivity of carbon nanotubes, achieving improved brightness capability without significantly increasing device structural complexity
Solution Approach 2:
The patent optimizes the concentration and dispersion of carbon nanotubes in the polymer matrix to achieve the right balance between electrical conductivity and optical transparency, thereby enhancing brightness capability while maintaining relatively simple material 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
The carbon nanotube-based touch panel offers superior durability, high sensitivity, and accuracy, with uniform resistance distribution and improved optical transparency, enabling precise touch detection and enhanced user interaction.
Implementation Method 1
At least one of the first and second conductive layers includes a plurality of spaced carbon nanotube structures. Two ends of each carbon nanotube structure are connected with two corresponding opposite electrodes, and each electrode is connected with the end of at least one carbon nanotube structure.
Implementation Method 2
carbon nanotube strip-shaped film structures are aligned orthogonally and connected to electrodes, providing improved mechanical strength, uniform conductivity, and optical transparency
Implementation Method 3
carbon nanotube strip-shaped film structures are aligned orthogonally and connected to electrodes, providing improved mechanical strength, uniform conductivity, and optical transparency
Data Source
AI summary
A touch panel includes a first electrode plate, and a second electrode plate separated from the first electrode plate. The first electrode plate includes a first substrate, a first conductive layer, and at least two electrodes. The second electrode plate includes a second substrate, a second conductive layer, and at least two electrodes. At least one of the first and second conductive layers includes a plurality of carbon nanotube structures. Two ends of each carbon nanotube structure are connected with two corresponding opposite electrodes, and each electrode among all the corresponding electrodes is connected with the end of at least one of the carbon nanotube structures. A display device adopting the touch panel includes the touch panel and a display element.