Power Saving Circuit with Variable Resistor for Stylus Sleep Management
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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 detection.
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 it unpressed, allowing the processing module to detect voltage changes and control power supply, effectively reducing power consumption during sleep states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If power supply is continuously supplied to certain parts of the electronic device to enable rapid awakening from sleep state, then the response speed of the electronic device is improved, but the power consumption in deep sleep state increases
Solution Approach 1:
The patent segments the power supply circuit into different regions: a first region that remains powered on for rapid awakening and a second region that is completely powered off to minimize power consumption. The switch element selectively connects or disconnects the power supply to different regions based on sleep mode requirements, allowing the device to achieve both fast response and low power consumption by segmenting the power distribution.
Solution Approach 2:
The patent introduces a dynamic power management system where the switch element can change its state based on operational requirements. The processing module dynamically controls the switch element to connect or disconnect power supply to the second region, enabling the system to adapt power consumption levels according to whether the device is in sleep mode or active mode, thus resolving the contradiction between response speed and power consumption.
2Ease of operation
If a button is added to the stylus for turning on power supply from sleep state, then the ease of operation is improved, but the device complexity increases
Solution Approach 1:
The patent makes the variable resistor serve multiple functions: it acts as both a pressure-sensing element for detecting stylus contact and a power switch element for controlling power supply to the second region. This multi-functionality eliminates the need for a separate button, thereby improving ease of operation while avoiding the increase in device complexity that would result from adding a dedicated power button.
Solution Approach 2:
The patent merges the pressure sensing function and power switching function into a single variable resistor component. The same component that detects user interaction (pressure) also serves as the power control mechanism, combining two functions into one element and thus avoiding the need for additional components like a separate button, which would increase device complexity.
3Use of energy by moving object
If power supply is completely removed in deep sleep state, then the power consumption is reduced, but the ability to rapidly awaken the electronic device deteriorates
Solution Approach 1:
The patent segments the device circuit into a first region and a second region with different power supply states. The first region maintains power supply for rapid awakening functionality, while the second region is completely powered off to minimize power consumption. This segmentation allows the device to achieve both low power consumption in sleep mode and fast awakening capability by having critical components remain powered while non-critical components are powered down.
Solution Approach 2:
The patent implements preliminary action by keeping the first region powered on in advance during sleep mode, so that when awakening is needed, the critical circuits are already ready and can respond immediately. This preliminary power maintenance of essential components enables rapid awakening without requiring complete power restoration from zero, thus resolving the contradiction between power savings and awakening speed.
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
This solution efficiently reduces power consumption in electronic devices during sleep states, thereby increasing standby time and usage duration by ensuring power is only supplied when necessary.
Implementation Method 1
a variable resistor 10, a switch 13 and a processing module 14... The processing module 14 is capable of detecting the condition of the voltage of the variable resistor 10
Data Source
AI summary
A power saving circuit includes a variable resistor, a switch and a processing module. A power supply unit is connected between the switch and the variable resistor. The processing module is connected between the switch and the variable resistor. 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.