Face Detection Display Control for Mobile Power Management
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Solution Overview
Problem
Portable electronic devices often activate screensavers at inconvenient times, requiring users to manually reactivate the display, which can be inconvenient, especially when reading or viewing content for extended periods.
Innovation Solution
Incorporating a camera and face recognition software that keeps the display on by recognizing a human face, thereby overriding the screensaver function and preventing power saving modes until the face is no longer detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a screensaver function is implemented to conserve power, then energy consumption is reduced, but the display may turn off at inconvenient times requiring manual reactivation
Solution Approach 1:
The system uses the camera to automatically detect whether a user is present and viewing the display, eliminating the need for manual input. The display automatically remains on or turns off based on detected user presence, allowing the system to serve itself without requiring user interaction to maintain display activation.
Solution Approach 2:
The camera continuously monitors for user presence and provides feedback to the control circuitry, which adjusts display state accordingly. This closed-loop feedback system ensures the display remains on only when needed, optimizing power consumption while maintaining user convenience.
2Ease of operation
If the display remains on continuously to avoid manual reactivation, then user convenience is improved, but power consumption increases
Solution Approach 1:
The display state is made dynamic rather than static. The system transitions between on and off states based on real-time detection of user presence. The camera continuously monitors for user face, and the display state adjusts dynamically to match actual usage conditions, optimizing both convenience and power efficiency.
3Extent of automation
If a camera and face recognition system are added to detect user presence, then automatic display control is improved, but device complexity increases
Solution Approach 1:
The camera serves multiple functions: it can be used for standard photography/camera operations and for detecting user presence to control display state. By making the camera multi-functional, the system achieves automatic display control without adding dedicated hardware solely for presence detection, thereby limiting the increase in device complexity.
Data Source
AI summary
Apparatus and method provide a hold on function in a mobile phone or other portable electronic equipment keeps the display thereof turned on in spite of a screensaver or other power saving feature while a user is reading or watching the display and allows activating of power saving facilities of the mobile phone or equipment only when a user no longer is reading or watching the display. Also, a computer program product stored in a storage medium, includes a storage medium, a computer program including face recognition software to recognize whether an input image represents that of a human face, and a control program to control operation of portable electronic equipment depending on whether or not an input image represents a human face.