Pressure-Triggered Power Saving Circuit for Fast Wake-Up
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Solution Overview
Problem
Conventional electronic devices continue to consume power in deep sleep states due to ongoing supply to certain parts for rapid awakening, leading to significant power consumption issues, particularly in devices like styluses that rely on pressure sensing functions.
Innovation Solution
A power saving circuit interposed between a power supply unit and a device circuit, comprising a variable resistor, a switch, and a processing module, where the switch conducts power when the resistor is pressed and maintains conductivity through a working signal when unpressed, allowing the processing module to detect voltage changes and control power supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If power supply is supplied to certain parts of the electronic device in deep sleep state for rapid awakening, then the awakening speed is improved, but the power consumption increases
Solution Approach 1:
The power supply system is segmented into multiple independent parts: a first power supply unit for the processing module and a second power supply unit for the device circuit. The switch selectively connects these units, allowing the processing module to be powered down independently while maintaining the ability to rapidly awaken by selectively reactivating power to specific components.
Solution Approach 2:
The switch is pre-configured to maintain conductivity between the first and second power supply units after the variable resistor is pressed. This preliminary action ensures that when awakening is needed, the power supply path is already established, enabling rapid transition from sleep state to active state without requiring complete system reinitialization.
2Stability of the object's composition
If the switch maintains conductivity after variable resistor is pressed, then the power supply continuity is improved, but the power consumption in sleep state increases
Solution Approach 1:
The switch's conductivity state is made dynamic rather than static. It transitions between conductive and non-conductive states based on the variable resistor's condition. When the variable resistor indicates sleep state, the switch breaks conductivity to save power; when awakening is detected, the switch restores conductivity to ensure continuous power supply.
Solution Approach 2:
The processing module detects the condition of the variable resistor and generates a working signal that feeds back to control the switch. This feedback mechanism ensures the switch maintains conductivity only when needed (when the variable resistor is pressed), automatically adjusting power supply continuity based on real-time system state.
3Use of energy by moving object
If the switch breaks power supply when working signal is off state, then the power consumption is reduced, but the response time for awakening increases
Solution Approach 1:
The switch maintains a readiness state by preserving the power supply path configuration even when breaking conductivity. The first and second power supply units remain positioned and configured, so when the variable resistor is pressed and the working signal activates, power can be restored immediately without requiring physical reconfiguration or system reinitialization.
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
Efficiently reduces power consumption in sleep states, thereby increasing the standby time of electronic devices by selectively managing power supply based on pressure sensing inputs.
Implementation Method 1
The processing module is capable of detecting the condition of the voltage of the variable resistor
Data Source
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AI summary
A power saving circuit includes a variable resistor, a switch and a processing module. A power supply unit is connected to the switch and the variable resistor. The processing module is connected to the switch. The switch connects with the variable resistor. The switch is capable of conducting the power supply unit and the processing module when the variable resistor is be pressed. The processing module is capable of transmitting a working signal to the switch for making the switch continuing conducting the power supply unit and the processing module when the variable resistor is unpressurized after the power is transmitted to the processing module. The processing module is capable of detecting the condition of the voltage of the variable resistor to change the working signal. The switch is capable of breaking the power supply of the processing module if the working signal is off state.