Mobile Radar Power Modes for Ambient Interface Awareness
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Solution Overview
Problem
Current power-saving techniques for mobile devices are inefficient, particularly when using cameras and processing image or video data to detect user presence, as they often consume more power than simply leaving the display on, and fail to provide a rich ambient experience that educates the user of the device's awareness and responsiveness.
Innovation Solution
A mobile device-based radar system that applies different power modes to a multi-mode interface, using a radar field to detect user presence and movements, providing visual feedback and reducing power consumption by dynamically adjusting display settings based on the level of user interaction, including dormant, ambient, alert, and active modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If camera and image processing are used to detect user presence, then user awareness and responsiveness are improved, but power consumption increases
Solution Approach 1:
The system segments the ambient interface into multiple power modes (dormant, ambient, alert, active) with progressively increasing levels of responsiveness and visual feedback. Each mode provides appropriate user awareness for its specific context, avoiding the need for continuously high-power operation while maintaining situational awareness when needed.
Solution Approach 2:
The system dynamically transitions between different power modes based on detected user interactions. The ambient interface adjusts its responsiveness and visual feedback characteristics in real-time, allowing the device to optimize power consumption while maintaining appropriate user awareness for the current interaction level.
2Loss of information
If display is left on continuously, then user awareness is maintained, but power consumption increases
Solution Approach 1:
Instead of maintaining uniform high-level display activation, the system applies different visual feedback characteristics to different aspects of the ambient interface based on the detected interaction level. For example, in dormant mode minimal visual elements are shown, while in active mode full visual feedback is provided, optimizing power consumption while maintaining appropriate user awareness.
Solution Approach 2:
The system provides partial visual feedback and responsiveness appropriate to each power mode rather than full continuous operation. In lower power modes, limited visual elements are displayed to maintain basic user awareness, while higher power modes provide comprehensive visual feedback, avoiding the energy waste of continuous full-display operation.
3Measurement precision
If radar system operates in high-power mode continuously, then detection accuracy is improved, but power consumption increases
Solution Approach 1:
The radar system operates in periodic pulses rather than continuous transmission, switching between different power modes based on detected interaction levels. This allows the system to maintain detection accuracy when needed while consuming minimal power during idle periods, directly resolving the contradiction between continuous high-accuracy detection and power consumption.
Solution Approach 2:
The system changes operational parameters of the radar system based on the detected interaction level. In dormant mode, radar operates with lower power and reduced detection frequency, while in active mode it increases power and detection accuracy. This dynamic parameter adjustment maintains measurement precision when required while minimizing power consumption during low-activity periods.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively reduces power consumption while maintaining user awareness and responsiveness, providing a seamless and efficient power management experience by dynamically adjusting power states in response to user interactions, thereby extending battery life and enhancing user engagement.
Implementation Method 1
A mobile device-based radar system for applying different power modes to a multi-mode interface, using a radar field to detect user presence and movements
Data Source
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AI summary
This document describes techniques and systems that enable a mobile device-based radar system (104) for applying different power modes to a multi-mode interface (114). The techniques and systems include a user device (102) having a radar system (104), and an interaction manager (106). The radar system (104) generates a radar field (110), provides radar data, and operates at one of various different radar-power states. The user device (102) analyzes the radar data to detect a presence or movement of a user within the radar field (110). Responsive to the detection, the radar system (104) changes from a first radar-power state to a second radar-power state. Based on this change, the interaction manager (106) selects a power mode, for a multi-mode interface (114), that corresponds to the second radar-power state, and applies the selected power mode to the multi-mode interface (114) to provide a corresponding display via a display device (116).