Flexible Data Cable Structure for High-Speed EMI Suppression
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Solution Overview
Problem
Flexible flat cables used in digital electronic devices generate significant electromagnetic interference (EMI) noise during high-speed data transmission, leading to data loss and malfunction, necessitating a cost-effective solution to reduce this noise.
Innovation Solution
A data transmission cable design featuring a signal transfer line covered by an impedance matching sheet with a conductive bending tape wound perpendicular to its longitudinal direction, which suppresses EMI noise by grounding the tape and connecting impedance matching sheets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If flexible flat cables are used for data transmission, then manufacturing cost is reduced and physical flexibility is improved, but electromagnetic interference noise increases during high-speed data transmission
Solution Approach 1:
The patent introduces an impedance matching sheet as an intermediary component between the signal transfer line and the external environment. This sheet acts as a mediator that controls electromagnetic field distribution and reduces EMI noise radiation, thereby resolving the contradiction between using simple flexible flat cables and reducing electromagnetic interference.
Solution Approach 2:
The patent employs a composite structure consisting of the flexible flat cable combined with the impedance matching sheet made of specific material properties. This composite approach maintains the flexibility and low cost of the original cable while adding EMI reduction capabilities through the specialized matching sheet material.
2Speed
If high-speed data transmission is implemented, then signal transfer speed is improved, but electromagnetic interference noise increases causing data loss
Solution Approach 1:
The patent changes the electromagnetic parameter characteristics by introducing the impedance matching sheet with specific impedance values. This parameter modification allows high-speed signal transmission while controlling electromagnetic field behavior to prevent noise generation and maintain data transmission reliability.
3Object-affected harmful factors
If conventional shielding methods are used to reduce EMI noise, then electromagnetic interference is suppressed, but manufacturing cost and device complexity increase
Solution Approach 1:
Instead of implementing comprehensive shielding throughout the entire cable system, the patent applies the impedance matching sheet locally at critical positions where EMI noise generation is most significant. This localized approach effectively suppresses electromagnetic interference while avoiding the complexity and cost of complete system-wide shielding.
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 design effectively reduces EMI noise generation while maintaining low manufacturing costs and enabling an automated process, thereby improving signal integrity and reducing data transmission errors.
Implementation Method 1
a conductive bending tape wound on an outer surface of the impedance matching sheet... suppresses EMI noise by grounding the tape and connecting impedance matching sheets
Data Source
AI summary
The present disclosure relates to a data transmission cable that may reduce electromagnetic interference (EMI) noise generated during data transmission and a display apparatus including the same and may include a signal transfer line; an impedance matching sheet configured to cover the signal transfer line; and, a conductive bending tape wound around the impedance matching sheet, in which the conductive bending tape may be disposed to be wound on an outer surface of the impedance matching sheet in a direction perpendicular to a longitudinal direction of the impedance matching sheet.