Power Receiving Apparatus Compliance Verification
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Solution Overview
Problem
The existing USB power delivery systems lack adequate safety measures to ensure that power receiving apparatuses only receive power from compliant power supply apparatuses, as authentication via USB AUTH communication does not guarantee compliance with the USB standard, and users are not informed of authentication or compliance test results.
Innovation Solution
A power receiving apparatus that includes a power receiving unit and a control unit to determine the authenticity of authentication information and compliance test results, allowing increased power reception only if both are valid, with user-friendly display of authentication and compliance status.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If USB AUTH communication is performed to authenticate power supply apparatus, then security is improved, but compliance with USB standard cannot be guaranteed
Solution Approach 1:
The power receiving apparatus performs compliance test determination before allowing full power reception. The control unit checks whether the power supply apparatus has passed the compliance test based on identification information, and only permits increased power reception after this preliminary compliance verification is completed, preventing power reception from non-compliant apparatus.
Solution Approach 2:
The control unit acts as an intermediary between the authentication process and power reception control. It receives authentication information, performs both USB AUTH verification and compliance test determination, then uses this intermediate assessment to control the power receiving unit's power intake, ensuring both security and compliance requirements are met.
2Reliability
If power control is restricted based on authentication result, then safety is improved, but user convenience deteriorates due to lack of information transparency
Solution Approach 1:
The control unit provides feedback to the user about the authentication result and compliance test determination result. It displays information indicating whether the power supply apparatus has passed authentication and compliance verification, making the safety assessment transparent to the user while maintaining safe power control based on these results.
3Productivity
If power receiving apparatus allows high power reception, then productivity is improved, but risk of power damage increases from non-compliant sources
Solution Approach 1:
The control unit performs preliminary verification of authentication information and compliance test results before allowing the power receiving unit to increase power reception from the first power to the second power. This preliminary check ensures that high power is only received from verified compliant apparatus, eliminating the need to trade off productivity against safety.
Solution Approach 2:
The control unit serves as an intermediary layer between the power receiving unit and the power supply apparatus. It manages the transition from restricted power reception to full power reception by verifying compliance status, allowing the system to achieve both high productivity through efficient power transfer and safety through compliance verification.
Data Source
AI summary
A power receiving apparatus includes a power receiving unit and a control unit. The power receiving unit receives a first power from a power supply apparatus via a connection unit. The control unit determines whether or not authentication information including identification information of the power supply apparatus is authentic, and determines whether or not the power supply apparatus has passed a compliance test based on the identification information. The power receiving unit is allowed to receive a second power greater than the first power, in a case where the authentication information is authentic and the power supply apparatus has passed the compliance test.