Bidirectional ReDriver IC Chip for USB Type-C Cable Direction Control
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Solution Overview
Problem
USB Type-C cables with integrated signal repeaters face directivity issues, limiting their bi-directional usage and length due to fixed connector orientations, which restrict their application in high-speed signal transmission protocols like DisplayPort.
Innovation Solution
A bidirectional signal ReDriver IC chip with sensors and amplifiers that automatically detect the host or device side and adjust signal transmission directions based on communication protocol changes, allowing bi-directional operation and extended cable lengths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If a signal repeater is integrated into a USB Type-C cable, then the cable length can be extended, but the cable loses bi-directional usability and requires specific connector orientations
Solution Approach 1:
The patent implements dynamic direction control by detecting the communication protocol (USB or DisplayPort) and automatically switching the signal transmission direction in the repeater. This allows the cable to adapt its signal flow direction based on the connected devices' roles, enabling bi-directional usability while maintaining extended cable length through the repeater function.
Solution Approach 2:
The patent changes the operational parameters of the repeater by detecting protocol-specific electric characteristics (voltage levels, signal patterns) and adjusting the signal transmission direction accordingly. This parameter-based control enables the same cable to function correctly in both USB and DisplayPort modes regardless of connector orientation.
2Speed
If the cable supports high-speed signal transmission protocols like DisplayPort, then the signal transmission rate is improved, but signal attenuation becomes more serious and cable length is limited
Solution Approach 1:
The patent introduces a signal repeater as an intermediary device within the cable that actively amplifies and regenerates high-speed signals. This intermediary component compensates for signal attenuation, enabling the cable to support high transmission rates (10 Gbps for USB 3.2, up to 8.1 Gbps for DisplayPort) over extended lengths that would otherwise be insufficient due to natural signal degradation.
3Reliability
If the connector orientation is fixed for proper signal transmission, then the signal transmission reliability is improved, but the ease of operation deteriorates as users must identify correct orientation
Solution Approach 1:
The patent implements self-service functionality through automatic protocol detection and direction switching. The repeater autonomously detects the communication protocol and electric characteristics, determines the correct signal transmission direction, and configures itself without user intervention. This eliminates the need for users to identify correct connector orientation while maintaining reliable signal transmission.
Solution Approach 2:
The patent uses feedback from detecting electric characteristics (voltage levels, signal presence) to automatically adjust the signal transmission direction. This feedback mechanism allows the system to adapt to the actual connection state and ensure proper signal flow regardless of how the connector is inserted, improving both ease of operation and reliability.
Data Source
AI summary
For adjusting a signal transmission direction in a cable, which is configured to be electrically coupled between a first interface port and a second interface port, an electric characteristic on at least a first pin of the first interface port is detected. Then a signal transmission direction of at least one pair of differential signal transmission channels in the cable is controlled to change from a first direction to a second direction different from the first direction, provided that a communication protocol between the first interface port and the second interface port is changed from a first communication protocol to a second communication protocol, and the electric characteristic complies with a first condition.