Projector Authorization via QR Code and Mobile Verification
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Solution Overview
Problem
Current projector lease systems face challenges in managing authorized use and time offline, as they lack online verification capabilities and are difficult to adjust without Internet access.
Innovation Solution
A method that encodes a license with authorization information into a QR code, allowing a mobile terminal to scan and verify it with a projector authorization server, enabling secure online verification and management of authorized use without Internet connectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If pre-configured offline authorization management is used in projectors, then the projector can operate without Internet access, but authorization management becomes difficult and cannot be adjusted online
Solution Approach 1:
A mobile terminal acts as an intermediary between the projector and the authorization server. The mobile terminal scans the projected authorization information, transmits it to the server for verification, and receives verification results. This intermediary approach enables online authorization management while maintaining offline projector operation, resolving the contradiction between offline operation capability and online management ease.
2Adaptability or versatility
If the projector is not connected to the Internet, then the projector can be used in offline environments, but online verification and adjustment of authorization cannot be performed
Solution Approach 1:
The authorization system is segmented into three independent components: the projector that displays authorization information, the mobile terminal that captures and transmits data, and the authorization server that verifies information. This segmentation allows the projector to operate offline while verification occurs online through the mobile terminal and server, resolving the contradiction between offline operation and reliable verification.
3Device complexity
If traditional offline authorization methods are used, then the system is simple, but security and management efficiency are reduced
Solution Approach 1:
The system implements a feedback mechanism where the authorization server verifies license information and terminal identifiers, then returns verification results to the mobile terminal, which relays them to the projector. This feedback loop enables secure online verification while maintaining relative system simplicity, resolving the contradiction between system simplicity and authorization security.
Data Source
AI summary
A method for authorized use of a projector, comprising the following steps: a projector encodes a license into a QR code and displays same by means of projection; a mobile terminal identifies the QR code to obtain the license and transmits the license and a local terminal identifier of the mobile terminal to a projector authorization server; the projector authorization service verifies the local terminal identifier and the license and generates verification information if the verification is successful, and transmits the verification information to the mobile terminal; the mobile terminal receives and displays the verification information; the projector receives the input verification information, locally verifies the verification information, and if the local verification is successful, obtains use authorization corresponding to authorization information.