Imaging System Power Conservation via Motion Detection
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Solution Overview
Problem
Light-based imaging systems for object detection and gesture control have high power requirements that exceed the limited power storage capabilities of mobile devices, making them unsuitable for mobile applications, despite their potential for small form factor and high signal fidelity.
Innovation Solution
Implementing adaptable operating modes for imaging systems that dynamically adjust power levels, modulation, and image capture rates based on the presence of object movement within a predefined area, allowing for reduced power consumption by switching to lower resolution or standby modes when no movement is detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the illumination source is applied at a constant power level and/or constant frequency during operation, then the imaging system achieves consistent performance and reliability, but the power consumption increases beyond the limited power storage capability of mobile devices
Solution Approach 1:
The patent implements dynamic adjustment of illumination power levels and modulation frequencies based on detected object movement. The system transitions between multiple operating modes (standby, low-power, normal, high-performance) with varying power levels, transforming the static constant-power approach into a dynamic adaptive approach that matches actual imaging needs.
Solution Approach 2:
The system changes key operating parameters including illumination power level, modulation frequency, and image capture rate based on movement detection. When no movement is detected, the system reduces power levels and modulation frequencies; when movement is detected, it increases these parameters to maintain imaging quality, thus adapting parameters to actual requirements.
2Measurement precision
If the imaging system operates at constant maximum lateral resolution (number of pixels), then the best performance is achieved in worst case usage scenarios, but the power consumption exceeds the power storage capabilities of mobile devices
Solution Approach 1:
The system applies partial action by using maximum resolution only when necessary (when object movement is detected). During periods without movement, the system reduces the number of active pixels and lowers resolution requirements, utilizing only the necessary imaging capability rather than maintaining constant maximum resolution, thus reducing power consumption while maintaining performance when needed.
3Productivity
If the imaging system captures images at high frame rates to enable object tracking and gesture control, then the productivity and responsiveness are improved, but the power consumption increases beyond what mobile devices can sustain
Solution Approach 1:
The system implements periodic adjustment of image capture rates based on movement detection. Instead of continuous high-rate capture, the system alternates between low capture rates during static periods and high capture rates during movement periods. This periodic modulation of capture activity aligns power consumption with actual tracking needs.
Data Source
AI summary
Representative implementations of devices and techniques provide adaptable settings for imaging devices and systems. Operating modes may be defined based on whether movement is detected within a predetermined area. One or more parameters of illumination or modulation may be dynamically adjusted based on the present operating mode.