Flexible Flat Cable Shielding Against Displacement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Flexible flat cables used for signal transmission in electronic devices often experience a loss of shielding effect due to relative displacement between superimposed cables, leading to inadequate protection of signal transmission lines.
Innovation Solution
A configuration where a first cable with a continuous ground line group is arranged in opposition to a second cable with transmission lines, ensuring that the transmission lines, which vary in voltage, are positioned to be covered by the ground line group, even when the cables are displaced, thereby maintaining a shielding effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ground lines are arranged at positions in opposition to transmission lines to implement shielding, then shielding effect is achieved, but relative displacement between cables causes misalignment and shielding effectiveness deteriorates
Solution Approach 1:
Multiple ground lines are merged into a continuous ground line group that spans across multiple transmission line positions. This merging creates an extended shielding region that can accommodate relative displacement between cables while maintaining shielding effectiveness, as the continuous ground line group ensures at least one ground line remains aligned with each transmission line even when displacement occurs.
2Quantity of substance
If multiple flexible flat cables are superimposed to increase packaging density, then packaging density is improved, but relative displacement between superimposed cables causes misalignment of ground lines and transmission lines
Solution Approach 1:
The ground lines are extended in the longitudinal dimension to form continuous ground line groups that span multiple transmission line positions. This dimensional extension creates a tolerance zone that absorbs relative displacement between superimposed cables, allowing the cables to be densely packaged while maintaining shielding alignment through the extended ground line coverage.
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
This configuration effectively shields transmission lines from electromagnetic interference even when cables are displaced, ensuring reliable signal transmission by positioning voltage-varying transmission lines in opposition to a ground line group, which shields them from electromagnetic waves.
Implementation Method 1
a ground line group in which ground lines are lined up continuously in a plurality of transmission lines lined up in a predetermined direction... transmission lines, in which voltage varies, being arranged so as to be in opposition to a region that covers the ground line group
Data Source
AI summary
A liquid ejecting apparatus includes a first cable and a second cable. The first cable includes a ground line group in which ground lines are lined up continuously in a plurality of transmission lines that are lined up in a predetermined direction. The second cable that is arranged so as to be in opposition to the first cable.