Projector Preview Control via Host Terminal Intermediary
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Solution Overview
Problem
In educational settings, projectors often inadvertently display inappropriate images from students' computers, affecting teaching quality due to the lack of preview and control mechanisms for image content before public display.
Innovation Solution
A display apparatus with a processing module that transmits preview data from a client terminal to a host terminal, allowing the host to review and grant permission for the image to be displayed, thereby preventing inappropriate content from being shown publicly, and establishing wireless connections to reduce data exchange complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the projector directly displays images from client terminals without preview, then the display system is simple and responsive, but inappropriate content may be displayed publicly affecting teaching quality
Solution Approach 1:
The system performs preliminary action by requiring clients to send preview data to the host terminal before actual display. The host terminal displays a preview image and obtains approval from the user before allowing the client terminal to transmit full image data for projection. This preliminary review mechanism prevents inappropriate content from being displayed while maintaining system simplicity.
Solution Approach 2:
The host terminal acts as an intermediary between the client terminal and the display apparatus. It receives preview data from clients, displays preview images for user approval, and only after approval is obtained does it allow the client to transmit full image data to the display apparatus. This intermediary role enables content control without requiring complex direct monitoring of all client displays.
2Reliability
If multiple direct connections are established between host terminal and each client terminal for data exchange, then data transmission is reliable, but the number of connections and system complexity increases
Solution Approach 1:
The system merges the data transmission function into a single connection between the host terminal and the display apparatus. Instead of establishing separate direct connections between the host terminal and each client terminal for data exchange, all client data is transmitted through the display apparatus which acts as a relay. This consolidation reduces the number of connections while maintaining reliable data transmission.
Solution Approach 2:
The display apparatus serves as an intermediary data relay. Client terminals send their data to the display apparatus, which then transmits it to the host terminal for processing and approval. This intermediary role eliminates the need for multiple direct connections between the host and each client, simplifying the connection architecture while maintaining data transmission reliability.
Data Source
AI summary
A display method is applicable for a display apparatus. The display method includes transmitting preview data outputted by a client terminal to a host terminal such that the host terminal displays a preview image corresponding to the preview data. After the host terminal displays the preview image, if the host terminal outputs a first display permission signal, the display apparatus is utilized to display an image corresponding to an image signal outputted by the client terminal. A display apparatus, a video system and a projector are disclosed herein as well.