Graphene-Coated Signal Cable for Audio Systems
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Solution Overview
Problem
Existing signal cables, particularly those used in audio systems, face challenges with high resistance and susceptibility to interference due to their material composition, leading to degradation in sound quality and fidelity, and are often costly due to the use of precious metals.
Innovation Solution
A signal cable is developed using a two-dimensional graphene layer sandwiched between polymer layers, such as polyethersulfone or polycarbonate, with a protective Teflon insulation, providing low resistance and immunity to electromagnetic interference while maintaining mechanical strength and transparency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional copper or aluminum conductors are used in signal cables, then electrical conductivity is achieved, but resistance and susceptibility to electromagnetic interference increase, degrading sound quality
Solution Approach 1:
The patent employs a composite structure consisting of a copper core surrounded by a graphene layer. This composite material combines the high electrical conductivity of copper with the electromagnetic interference shielding properties of graphene, creating a conductor that simultaneously achieves low resistance and immunity to electromagnetic interference, thereby resolving the contradiction between reliable signal transmission and resistance to harmful electromagnetic factors
Solution Approach 2:
The graphene layer serves multiple functions simultaneously: it acts as an electromagnetic interference shield, provides additional conductive pathways to reduce overall resistance, and offers mechanical strength to the cable structure. This multi-functionality allows the cable to achieve both low resistance and EMI immunity without requiring separate components, thus resolving the technical contradiction
2Loss of energy
If precious metals like silver or gold are used to reduce resistance, then electrical conductivity improves, but manufacturing cost increases significantly
Solution Approach 1:
The patent replaces expensive precious metals with a cost-effective alternative: a thin graphene layer deposited on a copper core. Graphene can be produced through chemical vapor deposition or other scalable methods at significantly lower cost than silver or gold, while providing comparable or superior electrical conductivity. This substitution dramatically reduces manufacturing cost while maintaining low power loss performance
Solution Approach 2:
The invention changes the material parameter from bulk precious metal to a two-dimensional graphene layer with exceptional electrical conductivity. By utilizing the unique properties of graphene (higher electron mobility than copper), the patent achieves low resistance without requiring expensive materials, thus resolving the contradiction between minimizing power loss and maintaining ease of manufacture
3Loss of energy
If thicker copper conductors are used to reduce resistance, then power loss decreases, but cable weight and flexibility are adversely affected
Solution Approach 1:
The patent changes the material parameter from traditional copper to graphene-coated copper, utilizing graphene's superior electrical conductivity (higher electron mobility). This allows the use of thinner conductor cross-sections to achieve the same or better conductivity performance, thereby reducing cable weight while maintaining low power loss characteristics
Solution Approach 2:
The graphene coating is applied locally on the surface of the copper core, concentrating the high-conductivity material where it is most effective for electron transport. This localized application provides maximum conductivity enhancement with minimum material usage, reducing overall cable weight while maintaining low power loss
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 graphene-based signal cables minimize power loss and noise, ensuring high-fidelity sound reproduction with reduced parasitic oscillations and electromagnetic interference, offering a cost-effective solution with improved sonic characteristics.
Implementation Method 1
a signal cable (100) for transmitting a signal between a transmitter (5) and a receiver (4) of an audio system, comprising: a two-dimensional graphene layer (1)
Implementation Method 2
two-dimensional graphene layer sandwiched between polymer layers, such as polyethersulfone or polycarbonate, with a protective Teflon insulation
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
Brief description The present invention is a signal cable for transmitting the signal between the transmitter and the receiver, providing an electrical connection by a connecting part, wherein said connecting portion comprises a layer of graphene disposed on a polymer layer, characterised in that it comprises two conductors, wherein each conductor includes a connecting portion arranged in a protective insulating layer (3) and the coupling portion takes the form of a tape, in which the graphene layer (1) is disposed between two polymer layers (2). The present invention also provides the use of the signal cable.