Portable Device Automatic Mode Switching via Micro-Sensor
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Solution Overview
Problem
Portable electronic devices consume battery power continuously when not in use, leading to battery drainage, as they lack automatic power management to switch modes based on usage status.
Innovation Solution
Incorporating a micro-sensor and control circuit that automatically switches the device between normal, standby, sleep, and turn-off modes based on sensing signals indicating whether the device is worn or carried, and communication signals from external sources, optimizing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the portable electronic device continues operating without manual power switch, then the device remains ready for use, but battery power is continuously drained
Solution Approach 1:
The device automatically detects whether it is being worn through the micro-sensor and switches operation modes without user intervention. The control circuit monitors the sensing signal and autonomously transitions between normal mode, standby mode, sleep mode, and turn-off mode, eliminating the need for manual power switch operation while optimizing battery consumption.
Solution Approach 2:
The device changes its operational parameters by switching between different modes (normal, standby, sleep, turn-off) based on the sensing signal from the micro-sensor. Each mode corresponds to different power consumption levels and operational states, allowing the device to adapt its parameters dynamically to conserve battery power when not in use.
2Use of energy by moving object
If the device switches to standby mode immediately when not worn, then power consumption is reduced, but frequent switching between modes increases system complexity
Solution Approach 1:
The control circuit introduces a timer that starts counting when the device transitions to standby mode. Before immediately switching to sleep or turn-off mode, the timer provides a predetermined delay period, allowing the system to prepare for potential quick resumption of use. This preliminary timing action prevents premature mode changes and reduces unnecessary transitions.
Solution Approach 2:
The control circuit continuously monitors the sensing signal from the micro-sensor and uses this feedback to determine when to switch modes and when to remain in current mode. The timer provides additional feedback about the duration of the current state, enabling the control circuit to make informed decisions about mode transitions based on both sensor input and time-based feedback.
3Extent of automation
If the device uses a micro-sensor to detect wearing status, then automatic mode switching is enabled, but the device complexity increases
Solution Approach 1:
The micro-sensor and control circuit are designed to serve multiple functions: detecting whether the device is worn, triggering mode transitions, and providing input for the timer-based control logic. By making these components multi-functional, the patent reduces the need for separate dedicated components for each function, thereby limiting the increase in device complexity while achieving automatic mode switching.
Data Source
AI summary
A portable electronic device having automatic power supply mode switching is provided. The portable electronic device includes a micro-sensor and a control circuit. The control circuit controls operations of the electronic device, the micro-sensor senses whether the electronic device is carried or worn by a user. When the electronic device operates in a normal mode, and if the electronic device is not carried or worn for a time longer than a buffer period of a predetermined interval, the control circuit switches to a sleep mode, which results in lower power consumption.