Dual Shielded Cable Design for HDMI Signal Transmission
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Solution Overview
Problem
The existing high-speed data cables, such as HDMI and DisplayPort cables, are complex and expensive to manufacture due to their intricate configurations with multiple shielded wires, leading to high production costs and difficulties in termination.
Innovation Solution
A digital video cable design featuring dual shielded cable elements with one shielded conductor carrying high-speed differential signals and the other auxiliary signals, utilizing coaxial lines or Shielded Twisted Pairs, and incorporating a circuit carrier to connect these signals, which simplifies the cable structure and reduces the number of wires while maintaining signal integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple shielded wires are used to carry high-speed differential signals and auxiliary signals separately, then signal transmission reliability is improved, but cable complexity and manufacturing cost increase
Solution Approach 1:
The patent combines multiple functions into a single cable element by using the shield of a dual coaxial cable to carry both high-speed differential signals and auxiliary signals. This merging approach reduces the number of separate wires needed while maintaining signal transmission reliability through the inherent shielding properties of the coaxial structure.
Solution Approach 2:
The shield in the dual coaxial cable element is designed to serve multiple purposes: it provides electromagnetic shielding for the inner conductors and simultaneously functions as a conductor for auxiliary signals. This multi-functionality reduces overall cable complexity while maintaining reliability.
2Object-affected harmful factors
If multiple shielded wires with individual shields are used, then signal shielding effectiveness is improved, but manufacturing cost and termination difficulty increase
Solution Approach 1:
The patent merges two coaxial cable elements into a single dual coaxial element where the shields are joined together. This consolidation maintains shielding effectiveness for both inner conductors while significantly simplifying manufacturing and termination processes by reducing the number of separate shielded components that need to be assembled.
Solution Approach 2:
The joined shield structure serves dual purposes: providing electromagnetic shielding for both inner conductors and acting as a shared conductor for auxiliary signals. This multi-functional design improves ease of manufacture by reducing the number of termination points and assembly steps required.
3Adaptability or versatility
If a complex cable configuration with numerous wires is used, then signal transmission capability is improved, but production cost increases
Solution Approach 1:
The patent achieves full signal transmission capability by using a dual coaxial cable element where each inner conductor carries high-speed differential signals and the joined shield carries auxiliary signals. This merging of functions into a single cable element reduces production cost by minimizing the number of wires and assembly operations while maintaining complete signal transmission capability.
Solution Approach 2:
The dual coaxial cable element is designed with multi-functionality where the same structural components serve multiple purposes: the inner conductors carry high-speed signals, the shields provide electromagnetic shielding, and the joined shields simultaneously conduct auxiliary signals. This multi-functionality reduces production cost by eliminating the need for separate wires for each function.
Data Source
AI summary
A high speed video cable carries signals according to the High-Definition Multimedia Interface (HDMI) or DisplayPort standards, and includes a raw cable. The raw cable is constructed with either Shielded Twisted Pairs (STP) or coaxial lines which carry all signals on either shielded conductors or their shields. Some auxiliary signals including power are carried on ungrounded shields.