Electronic Device Power Management with External Supply
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Solution Overview
Problem
In electronic devices compliant with the USB PD standard, there is a challenge in maintaining operation when power supplied from an external device is insufficient, leading to potential unavailability of the device if the battery is not sufficiently charged.
Innovation Solution
An electronic device equipped with a determination unit to assess whether operation can be maintained based on power from an external device and a battery, and a notification unit to inform the user of the determination, allowing for appropriate power management and battery charging strategies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the electronic device operates while charging with power supplied from an external device, then the device can be used during charging, but when the supplied power is lowered and the battery is not sufficiently charged, the operation of the electronic device becomes unavailable
Solution Approach 1:
The determination unit performs preliminary assessment of whether operation can be maintained before actually lowering the power supply. By evaluating the battery charge level and power consumption requirements in advance, the system prevents operation unavailability by notifying the user beforehand or maintaining current power supply levels, thus ensuring reliable operation during power transitions.
2Adaptability or versatility
If the source device changes power supply capability dynamically, then the power supply can be optimized for different conditions, but the electronic device may experience operation unavailability if the battery is not sufficiently charged
Solution Approach 1:
The determination unit continuously monitors the battery charge level and power supply conditions, providing feedback to control whether the power supply capability should be changed. When the battery charge level is insufficient to maintain operation during power supply changes, the system provides notification to the user, enabling informed decisions about power supply adjustments while maintaining operation continuity.
Data Source
AI summary
An electronic device includes a determination unit that determines whether or not an operation of the electronic device can be maintained, based on power supplied from an external device to the electronic device and power supplied from a battery, in a case the power supplied from the external device to the electronic device changes, and a notification unit that notifies information corresponding to a result of the determination.