Wearable Motion Sensor Power Mode Transition Logic
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Solution Overview
Problem
Wearable computing devices face challenges in efficiently powering on their presence-sensitive displays without consuming excessive battery life, as existing methods often result in false positives and reduced battery life due to the lack of reliable power-on options.
Innovation Solution
A method that uses motion data from a motion sensor to determine specific motion vectors and angles, transitioning components from a low-power mode to a higher-power mode only when the user is likely viewing the display, based on multiple threshold criteria being met, thereby reducing unnecessary power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the presence-sensitive display is powered on in response to motion detection, then the user can access the display without physical interaction, but false positives occur that increase power consumption and reduce battery life
Solution Approach 1:
The system changes multiple parameters simultaneously including motion threshold sensitivity, time window duration, angular deviation limits, and power mode transitions based on the combination of motion detection results, thereby reducing false positives while maintaining ease of display activation
Solution Approach 2:
The system uses feedback from motion sensors to dynamically control power mode transitions of the display, adjusting operation based on detected motion patterns and reducing power consumption by only activating the display when genuine user interaction is detected
2Use of energy by moving object
If the presence-sensitive display remains powered off to conserve power, then battery life is extended, but the user must physically locate and press a power button to access the display
Solution Approach 1:
The system enables self-service operation where the display automatically activates in response to detected user motion, eliminating the need for manual power button interaction while managing power consumption through motion-based triggering
3Speed
If motion sensitivity is increased to detect user interaction, then display activation responsiveness is improved, but false positives increase that consume additional power
Solution Approach 1:
The system adjusts motion detection parameters including threshold values, time windows, and angular criteria to optimize the balance between detection sensitivity and false positive reduction, improving responsiveness while controlling energy loss
Data Source
AI summary
In one example, a method includes determining, based on motion data generated by a motion sensor of a wearable computing device, a plurality of motion vectors, wherein one or more components operatively coupled to the wearable computing device are operating in a first power mode during a first time period; determining, based on the plurality of motion vectors, a plurality of values. In this example, the method also includes, responsive to determining that each of the plurality of values satisfies a corresponding threshold, transitioning, by at least one component of the one or more components, from operating in the first power mode to operating in a second power mode.