Wall Socket Load Detecting Circuit Dynamic Voltage
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Solution Overview
Problem
USB wall sockets provide a fixed output voltage, which is insufficient for various modern smartphones and tablets, and they continue to consume power during standby states, resulting in unnecessary energy loss.
Innovation Solution
A wall socket with a power converting circuit and load detecting circuit that adjusts the DC output voltage based on identification signals from connected devices, allowing for dynamic voltage adjustment and reducing power consumption during standby.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed output voltage is provided by the USB wall socket, then the circuit structure is simple, but it is insufficient to satisfy the various charging requirements of different electronic devices
Solution Approach 1:
The patent implements dynamic voltage adjustment by using a controller that receives identification signals from connected devices and dynamically changes the output voltage level accordingly. The power converting circuit switches between different voltage levels (5V, 12V, 20V, etc.) based on device requirements, transforming the static fixed-voltage system into a dynamic adaptive system that resolves the contradiction between simplicity and versatility.
Solution Approach 2:
The patent changes the voltage parameter dynamically based on device identification. The controller detects device type through identification signals and adjusts the output voltage parameter to match device requirements, enabling the same hardware to serve multiple charging needs without requiring complex separate circuits for each device type.
2Loss of energy
If the USB wall socket maintains fixed power output, then the power supply is stable, but it causes unnecessary energy loss during standby state
Solution Approach 1:
The patent implements periodic detection of device connection status through the load detecting circuit, which continuously monitors for identification signals. The system alternates between active power output and standby state based on detection results, enabling energy-saving shutdown during idle periods while maintaining readiness to provide stable power when devices are connected.
Solution Approach 2:
The patent uses feedback mechanisms where the load detecting circuit monitors device connection status and feeds this information back to the controller. The controller adjusts power output based on this feedback, reducing or eliminating power consumption during standby while ensuring stable power delivery when devices are actively connected and need charging.
3Adaptability or versatility
If multiple voltage levels are provided for different devices, then the adaptability increases, but the control circuit complexity increases
Solution Approach 1:
The patent employs a universal controller that handles multiple functions: device identification, voltage level selection, and power conversion control. This single multi-functional component replaces what would otherwise require separate dedicated circuits for each voltage level and device type, achieving high adaptability while keeping the control circuit relatively simple through functional integration.
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
The solution enables the wall socket to provide multiple power supply modes that match the requirements of different devices, reducing energy wastage by dynamically adjusting voltage levels and turning off power when devices are not charging.
Implementation Method 1
The rectifier and filter circuit is electrically coupled to the input terminal and configured to convert an input voltage to a rectified voltage signal
Implementation Method 2
The rectifier and filter circuit is electrically coupled to the input terminal and configured to convert an input voltage to a rectified voltage signal
Implementation Method 3
The transformer includes a primary side electrically coupled to the rectifier and filter circuit, and a secondary side electrically coupled to the output terminal and configured to output a dc output voltage according to the rectified voltage signal
Implementation Method 4
The switch is electrically coupled to the primary side of the transformer and the driving circuit and configured to be turned on or off selectively according to the driving signal such that the voltage level of the dc output voltage outputted by the transformer corresponds to the driving signal
Data Source
AI summary
A wall socket includes a socket housing, an output terminal, a power converter circuit and a load detection circuit. The output terminal is arranged at a side of the socket housing and configured to output a DC output voltage. The power converter circuit is arranged in the socket housing and configured to convert an input voltage to the DC output voltage according to a control signal. The load detection circuit is configured to receive an identification signal outputted by an electronic device when the electronic device is connected to the output terminal, and output the control signal according to the identification signal to adjust a voltage level of the DC output voltage.