USB-C Cable Core Layout for Longer Signal and Power Reach
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Solution Overview
Problem
Conventional USB Type-C cables are limited by the shorter of communication or power supply distance due to the standard's specifications, restricting cable length and deteriorating communication quality when lengthened.
Innovation Solution
A communication cable design with reduced core count, thicker conductors, and specific wire configurations allowing for increased communication and power supply distances while maintaining reversibility and compatibility with USB Type-C standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the cable length is increased to extend communication and power supply distance, then the communication and power supply distances are improved, but the communication quality deteriorates and the cable diameter is constrained by connector size
Solution Approach 1:
The patent changes the physical parameters of the conductors by increasing their diameter (signal wire conductor diameter ratio d/D ≥ 0.06, power wire conductor diameter ratio d/D ≥ 0.10). This parameter change allows the cable to maintain lower resistance and better signal transmission over longer distances without exceeding the connector board size constraints, thereby resolving the contradiction between cable length and communication quality.
2Adaptability or versatility
If the number of cores is increased to support multiple communication functions, then the versatility is improved, but the device complexity increases and manufacturing costs increase
Solution Approach 1:
The patent implements multi-functionality by making the SBU1 and SBU2 wires capable of serving dual purposes: they can function as signal wires for alternate mode communications (HDMI, DisplayPort) or be configured as additional power wires (Vbus2). This universal design allows the cable to support multiple communication standards and functions without increasing the core count, thereby reducing complexity while maintaining versatility.
3Reliability
If the conductor diameter is increased to improve communication quality, then the communication quality is improved, but the cable diameter increases and exceeds connector board size limits
Solution Approach 1:
The patent optimizes the ratio parameters between conductor diameter and cable diameter (signal wire d/D ≥ 0.06, power wire d/D ≥ 0.10) rather than simply increasing absolute dimensions. This ratio-based parameter change ensures that conductors are sufficiently thick for good communication quality while the overall cable diameter remains within the constraints of USB Type-C connector boards, resolving the contradiction between communication quality and cable size.
Data Source
AI summary
A communication cable includes two first differential pair wires for transmitting high-speed differential signals, a second differential pair wire for transmitting low-speed differential signals, a power wire, a ground wire, and a configuration channel wire for detecting the front and back orientation of a plug, and the communication cable is devoid of other first differential pair wires than the two first differential pair wires.