USB Power Transition Notification for Electronic Apparatus
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Solution Overview
Problem
Existing USB PD standard power supply systems experience inconvenience due to the transition time required to change supply voltage, leading to potential power shortages and user confusion when operation modes are changed, and existing solutions fail to address this during voltage transitions.
Innovation Solution
An electronic apparatus is equipped with a control unit that notifies users when the supply voltage is transitioning, providing a state transition notification during power changes based on power consumption, and optionally includes a duration of the transition period.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the supply voltage is changed during power supply to optimize power loss, then power efficiency is improved, but the transition time causes insufficient power supply and potential operation disruption
Solution Approach 1:
The notification unit provides advance notice to the user before the voltage transition begins, allowing the user to pause operation mode changes until the transition is complete. This preliminary notification prevents power supply instability by informing users of the upcoming transition period.
Solution Approach 2:
The notification unit provides real-time feedback to the user about the voltage transition state. By displaying notification information during the transition period, the system enables the user to understand the current state and avoid operations that could disrupt power supply stability.
2Reliability
If the screen is grayed out to prevent operation during voltage transition, then power supply stability is maintained, but user convenience deteriorates due to lack of explanation
Solution Approach 1:
The notification unit acts as an intermediary between the system and the user during voltage transitions. Instead of simply disabling operations, it provides explanatory information about the transition state, maintaining power supply stability while preserving user convenience through transparent communication.
Solution Approach 2:
The notification unit uses visual changes (such as displaying notification information or changing display characteristics) to indicate the voltage transition state to the user. This provides clear visual feedback about system state without completely disabling user interface functionality.
3Adaptability or versatility
If the supply voltage is set to a sufficiently high value to support all operation modes, then adaptability is improved, but power loss increases due to larger voltage difference in power supply circuit
Solution Approach 1:
The system dynamically changes the supply voltage according to the required operation mode and power consumption. The voltage is adjusted in real-time based on actual needs, allowing the system to maintain adaptability for different operation modes while minimizing power loss by avoiding excessive voltage margins.
Data Source
AI summary
An electronic apparatus includes a connection unit that connects to a power supply device, and a control unit that controls an operation of the electronic apparatus by power received from the power supply device. When the power supplied from the power supply device is changed based on power consumption of the electronic apparatus, the control unit notifies user for a period until the power supplied from the power supply device is changed.