Power Supply Circuit Module for Automatic USB Channel Switching
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Solution Overview
Problem
Existing power supply systems for devices like projectors struggle to automatically configure signal channels for different external devices, leading to improper power supply and functionality issues.
Innovation Solution
A power supply circuit module with a judgment circuit that detects the connection state of external devices and switches them between first and second signal channels based on whether device information is received within a preset time, thereby automatically setting signal channel configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the USB port is connected to external devices for data transmission, then data transfer functionality is enabled, but power supply compatibility with devices requiring only power (like Google Chromecast) is lost
Solution Approach 1:
The system automatically detects device type and configures signal channels without user intervention. The judgment circuit autonomously determines whether to switch between first and second signal channels based on device information reception, enabling the USB port to self-adapt to different device requirements (data transmission vs. power-only mode).
Solution Approach 2:
The signal channel configuration is made dynamic through automatic switching between first and second signal channels based on real-time device detection. The system transitions from a static configuration to a dynamic one that adapts to the connected device's requirements, improving power supply compatibility while maintaining data transfer capability when needed.
2Reliability
If manual configuration of signal channels is required for different devices, then power supply can be optimized, but ease of operation deteriorates
Solution Approach 1:
The system implements automatic feedback-based device detection where the judgment circuit receives device information from connected external devices and automatically configures the appropriate signal channel. This feedback mechanism ensures reliable power supply configuration without requiring manual user input, simultaneously achieving both power supply accuracy and ease of operation.
Solution Approach 2:
The USB control module performs self-service by automatically detecting device type and configuring signal channels without user intervention. The system autonomously determines whether to use the first or second signal channel based on whether device information is received within the preset time period, eliminating the need for manual configuration while ensuring accurate power supply.
3Measurement precision
If the system waits for device information to determine configuration, then configuration accuracy improves, but response time increases
Solution Approach 1:
The system uses a preset time period (excessive action) to wait for device information, ensuring accurate device detection. Rather than waiting indefinitely or using a minimal time, the preset time period provides a reasonable balance that ensures detection accuracy while limiting the time loss, allowing the system to confidently determine whether to switch signal channels.
Data Source
AI summary
A power supply circuit module and a power supply judgment method thereof are provided. A power supply circuit supplies power to an electronic device coupled to the power supply circuit module. A plugging detection circuit detects the connection state of the electronic device. A judgment circuit switches the electronic device to connect to a first signal channel or a second signal channel in response to whether the electronic device provides device information of the electronic device within a preset time since the electronic device is coupled to the power supply circuit module. The power supply judgment method of the invention automatically sets signal channel configurations corresponding to different external devices, thereby greatly improving the convenience of use.