Motion-Based Low Power Control for Mobile Terminal Always-On Functions
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Solution Overview
Problem
Mobile terminals consume significant power due to always-on functions, particularly the acceleration sensor, MCU, and additional sensors, which affects standby time, especially in wearable devices with small batteries, necessitating a method to reduce power consumption while maintaining essential features.
Innovation Solution
Implementing a motion-based low power method where the always-on function is selectively activated and deactivated based on user motion, using an acceleration sensor to sense user activity and control the activation of the MCU and other sensors, thereby reducing unnecessary power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the always-on function is continuously driven to enable user input sensing, then the sensing capability is improved, but the power consumption increases
Solution Approach 1:
The patent applies dynamics by transitioning the sensing system between two operational states: low-power mode where only the acceleration sensor operates, and active mode where the MCU and additional sensors are activated. This dynamic state change allows the system to adapt its power consumption level based on actual sensing needs, resolving the contradiction between continuous sensing capability and power consumption.
Solution Approach 2:
The patent implements periodic action by having the MCU periodically wake up from low-power state to check for user input events detected by the acceleration sensor. This periodic activation pattern allows the system to maintain sensing capability while significantly reducing average power consumption compared to continuous operation of all sensing components.
2Ease of operation
If the screen is kept on to display information, then the user interface functionality is improved, but the power consumption increases
Solution Approach 1:
The patent applies self-service by implementing automatic screen control that responds to acceleration sensor data without requiring direct user input. The system autonomously determines when to wake the screen based on detected motion patterns, and automatically returns to sleep mode after a predetermined period of no motion, thereby providing user interface functionality while minimizing power consumption.
Solution Approach 2:
The patent uses feedback from the acceleration sensor to control screen state. The acceleration sensor continuously monitors motion and provides feedback to the controller, which then automatically adjusts screen state (on/off) based on detected user behavior patterns, enabling the system to provide user interface functionality only when actually needed.
Data Source
AI summary
Disclosed are a mobile terminal capable of implementing an always-on function with a lower power, based on a motion, and a motion-based low power implementing method thereof. The method includes sensing a motion of a user by using an acceleration sensor in a low-power always-on that only the acceleration sensor is activated; a selectively activating an always-on function according to the sensed motion and deactivating the always-on function when no motion is sensed in an always-on state and automatically entering to the low-power always-on function.