Differential Mode Signal Transmission Module with Common Grounding Conductor
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Solution Overview
Problem
Conventional flexible circuit cables face challenges in reducing electromagnetic interference, electrostatic discharge, and manufacturing costs due to the need for numerous conductor wires, which also complicates extension through narrow holes and increases device weight.
Innovation Solution
A differential mode signal transmission module with a reduced number of conductor wires, featuring a first section with external and extension connection ends, a shielding layer for impedance control, and conductive connection lines for grounding, allowing for a bundled structure that facilitates extension through narrow spaces and reduces manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a flexible circuit cable uses numerous conductor wires to transmit differential mode signals, then signal transmission capability is improved, but the number of conductor wires increases causing increased device weight, manufacturing cost, and difficulty in extension through narrow holes
Solution Approach 1:
The patent combines multiple grounding functions into a single common grounding conductor. Instead of providing separate grounding conductors for each differential mode signal transmission terminal, the invention uses one common grounding conductor that serves all terminals, thereby reducing the total number of conductor wires while maintaining grounding effectiveness across all signal terminals
Solution Approach 2:
The common grounding conductor performs multiple grounding functions simultaneously for all differential mode signal transmission terminals. This single conductor provides reference potential and noise sink functionality for multiple signal pairs, making it a multi-functional element that replaces what would traditionally require multiple separate grounding conductors
2Adaptability or versatility
If a flexible circuit cable uses numerous conductor wires to transmit differential mode signals, then signal transmission capability is improved, but manufacturing cost increases
Solution Approach 1:
The patent combines multiple grounding functions into a single common grounding conductor. Instead of providing separate grounding conductors for each differential mode signal transmission terminal, the invention uses one common grounding conductor that serves all terminals, thereby reducing the total number of conductor wires while maintaining grounding effectiveness across all signal terminals
Solution Approach 2:
The invention uses a standardized common grounding conductor design that can be replicated across different cable configurations. This standardized approach simplifies manufacturing processes and reduces costs by eliminating the need to create unique grounding arrangements for each cable variant
3Adaptability or versatility
If a flexible circuit cable uses numerous conductor wires to transmit differential mode signals, then signal transmission capability is improved, but extension through narrow holes becomes difficult
Solution Approach 1:
The patent combines multiple grounding functions into a single common grounding conductor. Instead of providing separate grounding conductors for each differential mode signal transmission terminal, the invention uses one common grounding conductor that serves all terminals, thereby reducing the total number of conductor wires while maintaining grounding effectiveness across all signal terminals
Solution Approach 2:
The flexible circuit cable is divided into functional segments: signal transmission segments (differential mode signal conductor wires) and grounding segment (common grounding conductor). This segmentation allows the cable to be more flexibly routed through narrow spaces while maintaining electrical integrity
4Object-affected harmful factors
If a metal shielding layer is covered on the surface of a flexible circuit board to block external electromagnetic noises, then electromagnetic noise shielding is improved, but the shielding effect is poor because the metal shielding layer is not actually connected to ground
Solution Approach 1:
The invention extracts the grounding connection function from the metal shielding layer and assigns it to the common grounding conductor. By separating the shielding function (metal layer) from the grounding function (common grounding conductor) and ensuring proper connection between them, the system achieves both electromagnetic noise blocking and effective grounding
Solution Approach 2:
The common grounding conductor acts as an intermediary that connects the metal shielding layer to the ground. This intermediary ensures proper electrical connection between the shielding layer and ground potential, enabling the shielding layer to effectively block electromagnetic noises by providing a low-impedance path for interference currents
5Reliability
If conventional flexible circuit boards are used to achieve effective grounding connection, then electrostatic discharge protection is improved, but manufacturing cost is much higher than flexible circuit cables
Solution Approach 1:
The invention uses a cost-effective flexible circuit cable structure with a common grounding conductor that provides adequate electrostatic discharge protection without the high manufacturing costs of conventional flexible circuit boards. The simplified grounding architecture achieves necessary protection at lower cost
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 solution effectively reduces the number of conductor wires, lowers manufacturing costs, and enhances electromagnetic shielding and electrostatic discharge protection, enabling easier extension through narrow holes and reducing device weight.
Implementation Method 1
cover a metal shielding layer on a surface of a flexible circuit board to block the external electromagnetic noises
Implementation Method 2
a flexible flat cable or a circuit board often generates high voltage electrostatic discharge due to extension through a bore in movement and fast and effective grounding connection is of vital importance
Implementation Method 3
the amplitudes of the coupling electromagnetic fields with respect to grounding lines are also identical, with the phases of the two conductor wires being opposite, the electromagnetic fields thereof will cancel each other and thus the influence thereof by external electromagnetic interference is reduced
Data Source
AI summary
A differential mode signal transmission module includes a first section having an external connection end on which at least a pair of differential mode signal transmission terminals are formed and includes a grounding terminal, a first differential mode signal terminal, and a second differential mode signal terminal. The extension connection end of the first section forms a counterpart signal terminals corresponding to those of the external connection end. At least one first conductive connection line is formed on the first section. The conductive connection line connects the grounding terminal of the external connection end of the first section to a collective grounding point. The extension connection end of the first section is connected to an extension section. The extension section is further connected to a second section opposite to the first section. The extension section includes at least one slit line in order to form a bundled section. The first section, the second section, and the extension section include at least one fold line.