Video Display Power Control via Source Activity Feedback
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Solution Overview
Problem
Video display apparatus, such as TV receivers, may inadvertently power off during user interaction with a source apparatus like a game machine due to misinterpretation of inactivity, leading to user inconvenience.
Innovation Solution
Incorporating a status information acquisition module to determine the activity status of the source apparatus via HDMI-CEC commands, and a power controller to maintain the video display apparatus active as long as the source apparatus is active, using a sleep timer to manage power states based on user interaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the video display apparatus uses a power saving function to power off after a prescribed time without user manipulation, then energy consumption is reduced, but the apparatus may inadvertently power off during user interaction with source apparatus
Solution Approach 1:
The video display apparatus monitors the activity status of the source apparatus through feedback signals (such as HDMI-CEC commands) and adjusts its power state accordingly. When the source apparatus is detected as active, the video display apparatus maintains its power-on state even though no direct user manipulation has occurred, preventing inadvertent power-off while still enabling power-saving functionality.
Solution Approach 2:
The activity status of the source apparatus serves as an intermediary indicator of user interaction. Instead of directly detecting user manipulation of the video display apparatus, the system uses the source apparatus's activity status as a mediator to infer whether the user is engaged in an activity that should prevent power-off.
2Reliability
If the video display apparatus monitors user manipulation directly to prevent power-off, then power state reliability is improved, but device complexity increases
Solution Approach 1:
The source apparatus performs self-monitoring of its own activity status and actively reports this information to the video display apparatus. This eliminates the need for the video display apparatus to implement complex direct monitoring of user manipulation, as the source apparatus handles its own status tracking and communication.
Solution Approach 2:
The activity status monitoring function is already present in the source apparatus for its own control purposes. By utilizing this existing multi-functional capability to also serve the video display apparatus's power management needs, the system avoids adding separate dedicated monitoring hardware or complexity.
Data Source
AI summary
According to one embodiment, there is provided a video display apparatus, including: a video display unit configured to display a video by receiving a video signal output from a source apparatus; a status information acquisition module configured to acquire, from the source apparatus, status information indicating whether the source apparatus is active or inactive; and a power controller configured to perform a control of powering off the video display apparatus if the acquired status information indicates that the source apparatus is inactive.