Display Apparatus Camera-Based User Presence Detection Power Saving
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Solution Overview
Problem
Conventional display apparatuses lack effective power-saving mechanisms, as they do not consider the user's presence or sleep state when determining power-off times, leading to unnecessary power consumption and reduced lifespan of components.
Innovation Solution
A display apparatus equipped with a camera-based user recognition system that analyzes images to detect the user's presence and sleep state, controlling power supply accordingly, entering a power-saving mode when the user is absent or asleep.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the display apparatus operates continuously without automatic power-off, then the user can view the display without interruption, but power consumption increases and component lifespan decreases
Solution Approach 1:
The system performs preliminary detection of user presence and state before initiating power-saving mode. The camera continuously monitors the user's presence and sleep state, and the controller proactively enters power-saving mode when the user is detected to be absent or asleep, preventing unnecessary power consumption before it occurs.
2Loss of energy
If the display apparatus uses time-based automatic power-off, then power consumption is reduced after preset time, but the user may be inconvenienced when still viewing
Solution Approach 1:
The system uses real-time feedback from camera-based user detection to dynamically adjust power mode. The camera continuously provides feedback on user presence and sleep state, allowing the controller to make informed decisions about when to enter or exit power-saving mode, ensuring power is not cut off when the user is still actively viewing.
3Loss of energy
If the display apparatus enters power-saving mode based on user absence detection, then unnecessary power consumption is reduced, but the system complexity increases due to camera and image analysis
Solution Approach 1:
The system uses the existing camera component (already present for other functions) to perform user presence and sleep state detection. The camera serves multiple purposes: original imaging function plus power-saving detection, eliminating the need for separate sensors and reducing overall system complexity despite the added intelligence.
4Loss of energy
If the display apparatus continuously monitors user presence, then power-saving opportunities are maximized, but energy is wasted on continuous monitoring operations
Solution Approach 1:
Instead of continuous monitoring, the system uses periodic detection through the camera at intervals sufficient to detect user presence changes and sleep states. This periodic approach reduces the energy consumed by monitoring operations while still capturing sufficient data to trigger power-saving modes when appropriate.
Data Source
AI summary
Disclosed are a display apparatus and a power saving method thereof. The power saving method of a display apparatus includes acquiring an image by photographing surroundings of the display apparatus, detecting a human body region contained in the image by analyzing the acquired image, and entering a power saving mode by determining there is no user viewing the display apparatus if the human body region is not detected in the image.