Power Receiving Control for Fast Startup Before Authentication
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Solution Overview
Problem
Existing power receiving apparatuses often require performing authentication communication before requesting power from a power supply apparatus, which may not be efficient in situations where immediate power is needed or when the power supply apparatus is not compliant with the USB PD standard.
Innovation Solution
A power receiving apparatus that includes a communication unit and a control unit capable of determining whether to perform authentication communication based on the power supply capabilities, requesting first power regardless of compliance, and then requesting second power if authentication is successful, allowing for efficient power supply and authentication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If authentication communication is performed before requesting power, then safety and reliability are improved, but the time to start receiving power increases
Solution Approach 1:
The control unit performs preliminary action by requesting power supply before authentication communication is completed. The power receiving apparatus sends a power request signal to the power supply apparatus in advance, and the power supply apparatus begins supplying power based on this request, even though full authentication hasn't been completed yet. This eliminates the sequential dependency where power supply had to wait for authentication, thereby reducing the time to start receiving power while maintaining reliability through subsequent authentication processes.
2Reliability
If authentication communication is performed before requesting power, then compliance with USB PD standard is ensured, but power supply efficiency decreases
Solution Approach 1:
The invention applies preliminary action by allowing the power receiving apparatus to request power supply before completing the authentication communication process. The control unit determines to perform power request in advance, and the power supply apparatus responds by supplying power based on the request signal. This reorders the traditional sequence to improve power supply efficiency while the authentication communication continues or completes afterward to ensure USB PD standard compliance.
3Reliability
If power is requested only after authentication, then safety is improved, but the time taken to start receiving power increases
Solution Approach 1:
The control unit performs preliminary action by determining to request power supply before the authentication communication is fully completed. The power receiving apparatus sends the power request signal in advance to the power supply apparatus. This preliminary power request allows the system to overlap the power supply initiation with the authentication process, rather than waiting for authentication to fully complete before starting power supply, thereby reducing the overall time while maintaining safety through continued authentication verification.
Data Source
AI summary
A power receiving apparatus includes a communication unit capable of communicating with a power supply apparatus, and a control unit that, based on information relating to power which the power supply apparatus is capable of supplying, determines whether or not to perform an authentication communication with the power supply apparatus to authenticate whether or not the power supply apparatus is a predetermined apparatus. The control unit requests the power supply apparatus to supply first power regardless of whether or not the power supply apparatus is the predetermined apparatus, in a case where the authentication communication is not performed, and the control unit requests the power supply apparatus to supply second power in a case where the authentication communication is performed and the power supply apparatus is authenticated as the predetermined apparatus.