USB Interface Signal Gating Through Default Device Detection
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Solution Overview
Problem
Electronic devices connected through USB interfaces cannot determine if the connected device is a default device, leading to potential damage or malfunction due to unsafe signals.
Innovation Solution
Incorporating detection modules, such as magnetic or optical sensors, to identify a default electronic device by detecting device identification components, and controlling signal transmission through switches based on detection results.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If connection interfaces are used to connect electronic devices, then signal transmission and communication between devices is enabled, but the risk of damage or malfunction increases due to inability to verify if the connected device is a default device
Solution Approach 1:
The detection module performs verification of the connected device before enabling signal transmission. The switch remains in the first state (blocking signals) until the detection module confirms the connected device is a default device, at which point the switch transitions to the second state (allowing signals). This preliminary verification action prevents unsafe signals from reaching the processing unit.
Solution Approach 2:
The detection module acts as an intermediary between the connection interface and the processing unit. It monitors the connected device and controls the switch state based on verification results, mediating the signal flow to ensure safety while maintaining compatibility with default devices.
2Reliability
If a detection mechanism is added to verify connected devices, then signal safety and device protection are improved, but device complexity increases due to additional components
Solution Approach 1:
The detection function is extracted as a separate detection module with dedicated detectionelectrodes, distinct from the connection interface and processing unit. This modular extraction allows the verification function to be added without fundamentally redesigning the existing system architecture, maintaining relative simplicity while improving safety.
Solution Approach 2:
The patent uses electrical field detection through detection electrodes to verify the connected device, replacing what would otherwise require complex mechanical or manual verification mechanisms. The detection module utilizes electrical properties to identify default devices, simplifying the verification process compared to alternative approaches.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Prevents non-default devices from sending signals to the processing unit, ensuring safe and secure communication by allowing only default devices to transmit signals.
Implementation Method 1
the first detection module is a magnetic sensor, and the device identification component is a magnetic element
Implementation Method 2
the magnetic sensor is a Hall sensor, and the magnetic element is a magnet
Implementation Method 3
The first detection module includes a first light emitting terminal and a first light receiving terminal
Implementation Method 4
If the first light receiving terminal receives a first light signal from the second light emitting terminal
Data Source
AI summary
An electronic system includes a first electronic device and a second electronic device. The first electronic device includes a first processing unit, a first connection interface, a first switch and a first detection module. The first connection interface includes a first data transmission pin or a first control signal pin. The first switch is electrically connected with the first processing unit and the first data transmission pin or electrically connected with the first processing unit and the first control signal pin. The second electronic device includes a second processing unit, a second connection interface and a device identification component. The second connection interface is electrically connected with the second processing unit. If the first detection module detects the device identification component, the first processing unit is allowed to receive signals from the first data transmission pin or the first control signal pin through the first switch.