USB Type-C Video Switching Apparatus Resolving Connection Order Constraints
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Solution Overview
Problem
USB Type-C video signal switching apparatuses face compatibility issues, requiring a specific connection order between video signal source devices and display devices, limiting user convenience and system operation.
Innovation Solution
A video signal switching apparatus with a controller, USB Type-C interface, and switching module that detects signals from display devices to generate control signals on specific channels, allowing re-handshaking with video signal sources, enabling flexible connection orders without manual unplugging and replugging of USB Type-C cables.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a video signal switching apparatus uses USB Type-C interface for video signal transmission, then data transmission speed and quality are improved, but compatibility issues arise requiring specific connection order
Solution Approach 1:
The switching module performs preliminary detection of display device signals before completing the handshaking process with the video signal source device. By detecting the presence and type of display device first, the system can prepare appropriate handshaking sequences and voltage levels, enabling flexible connection orders while maintaining USB Type-C's high-speed transmission capabilities
Solution Approach 2:
The switching module acts as an intermediary between the USB Type-C interface and the video output interfaces. It mediates the handshaking process by detecting display device signals and generating appropriate control signals to manipulate USB Type-C channel voltages, thereby enabling compatibility across different connection orders while preserving the high-speed data transmission benefit
2Reliability
If the system requires specific connection order (display devices first, then video signal source devices), then compatibility is maintained, but user convenience is reduced
Solution Approach 1:
The handshaking process is made dynamic and adaptive rather than following a fixed sequence. The switching module continuously monitors display device signals and adjusts the handshaking timing and voltage levels accordingly. This dynamic approach maintains system compatibility while allowing users to connect devices in any order, significantly improving user convenience
3Adaptability or versatility
If the switching module detects specific signals from display devices and generates control signals for re-handshaking, then connection flexibility is improved, but device complexity increases
Solution Approach 1:
The switching module combines multiple functions into a single integrated unit: display device signal detection, handshaking sequence generation, USB Type-C channel voltage control, and video signal routing. By merging these functions, the system achieves high connection flexibility while managing complexity through functional integration rather than separate components
Data Source
AI summary
A video signal transmission switching apparatus is disclosed. The video signal transmission switching apparatus is coupled between a source apparatus and a plurality of display apparatuses. The video signal transmission switching apparatus includes a controller, a USB Type-C connecting interface, a plurality of video output interfaces and a switching module. The controller is coupled to the source apparatus through the USB Type-C connecting interface at least including a specific channel. The controller is coupled to the plurality of display apparatus through the plurality of video output interfaces respectively. The switching module is coupled to the specific channel and coupled to the plurality of video output interfaces respectively. The switching module detects a specific signal of the plurality of display apparatus and controls the specific channel to re-perform handshaking accordingly.