Projection Playback Control for Scenario-Based Content and Time
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Solution Overview
Problem
Existing large-screen devices lack the ability to control projection content and time accurately, leading to mismatches between projected content and intended scenarios, such as projecting advertisements instead of teaching videos or exceeding playback time limits.
Innovation Solution
A projection method and system that sets conditions based on projection place, user group, and mode, allowing control over projection content, device, and time, ensuring compliance with specific scenarios by validating projection instructions against these conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If projection devices are restricted to allowed devices only, then security and trustworthiness of projection are ensured, but projection content and time cannot be flexibly controlled to match different scenarios
Solution Approach 1:
The projection control system segments the projection condition into multiple independent dimensions: projection place, user group, mode, content type, author, title, and time conditions. Each dimension can be independently configured and validated, allowing flexible combination to match different scenarios while maintaining security through multi-factor verification.
Solution Approach 2:
The system dynamically adjusts projection permissions based on real-time conditions. The destination electronic device evaluates projection instructions against dynamically set conditions including current time, location, user identity, and content characteristics, enabling adaptive control that responds to changing scenarios rather than static device authorization alone.
2Ease of operation
If projection content is not controlled, then projection flexibility is maintained, but unwanted content such as advertisements may be projected instead of intended content
Solution Approach 1:
The system implements feedback control by evaluating the projection instruction against pre-set conditions before execution. The destination electronic device receives the projection instruction, extracts projection information including content identification, and compares it against the projection condition database to verify content type, author, and title match the intended scenario, providing a feedback loop that prevents unwanted content projection.
Solution Approach 2:
The projection conditions are configured in advance before actual projection occurs. The system pre-establishes rules about what content should be projected under what circumstances, including content type restrictions, authorized authors, and title matching, so that when a projection instruction arrives, the evaluation can quickly determine compliance without real-time delays.
3Duration of action of stationary object
If projection time is not monitored, then projection continuity is maintained, but projection may exceed intended time limits such as playing beyond 30 minutes for adolescents
Solution Approach 1:
The system implements periodic time monitoring during projection playback. The destination electronic device continuously checks the current projection time against the allowed time condition in the projection condition set. When the projection duration approaches or exceeds the specified limit, the system automatically terminates further projection, ensuring strict adherence to time constraints while allowing continuous playback within acceptable limits.
Data Source
AI summary
A projection method and system to control at least two of the following: projection content, a projection device, and projection time. The projection method includes: obtaining a projection condition that includes at least two of the following: a projection content condition, a projection device condition, and a projection time condition; receiving a projection instruction used to request to project, to a destination electronic device, multimedia content currently displayed by a source electronic device. The projection instruction includes projection information and if the projection information satisfies the projection condition, the projection method performs projection playback based on a uniform resource locator of the projection content in the projection information.