Resonant Phase Sensing False Trigger Prevention
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Solution Overview
Problem
Existing mobile devices face challenges in detecting user interactions with human-machine interfaces due to the need for sensors that provide acceptable levels of sensor sensitivity, power consumption, and size, particularly in replacing mechanical buttons with virtual ones that mimic the feel of mechanical clicks.
Innovation Solution
A system utilizing a resistive-inductive-capacitive sensor with a measurement circuit that measures phase information at periodic intervals to determine displacement, driven by a driver that varies the frequency and amplitude, enhancing sensitivity and reducing false detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a sensor is used to detect user interaction with a virtual button, then the mechanical button can be replaced, but the sensor sensitivity and false detection rate become problematic
Solution Approach 1:
The patent applies dynamics by varying the driving frequency and amplitude of the resistive-inductive-capacitive sensor across multiple periodic intervals rather than using a fixed driving signal. This dynamic adjustment allows the system to adapt to different sensing conditions and distinguish true user interactions from false detections by analyzing phase information at varying drive parameters.
Solution Approach 2:
The patent implements parameter changes by modifying the driving frequency and amplitude as variables across measurement intervals. By changing these parameters dynamically, the system can optimize sensor sensitivity for different conditions while maintaining reliability through comparative analysis of phase information obtained at different parameter settings.
2Measurement precision
If the sensor measures phase information at fixed periodic intervals, then the measurement process is simple, but the sensitivity and ability to detect true interactions is reduced
Solution Approach 1:
The measurement process becomes dynamic as the system varies driving frequency and amplitude across periodic intervals. This dynamic approach enhances detection sensitivity by capturing phase information under different operating conditions, while the systematic variation pattern maintains manageable complexity through structured measurement sequences.
Solution Approach 2:
The patent employs periodic action by conducting measurements at multiple periodic intervals with varying drive parameters. This periodic measurement strategy enhances sensitivity by sampling the sensor response under different conditions while maintaining a regular, predictable measurement rhythm that balances complexity and effectiveness.
3Ease of operation
If a linear resonant actuator is used to provide vibrational feedback, then the user experience is improved, but the power consumption increases
Solution Approach 1:
The linear resonant actuator operates using periodic action by delivering vibrational feedback in controlled pulses rather than continuous operation. This periodic activation provides the necessary tactile feedback for user experience while minimizing power consumption by keeping the actuator inactive between feedback events.
Solution Approach 2:
The patent utilizes mechanical vibration through the linear resonant actuator to provide tactile feedback that enhances user experience. By leveraging resonant vibration at specific frequencies, the system achieves effective tactile response with optimized energy consumption, as the actuator operates efficiently at its resonant frequency rather than requiring continuous high-power operation.
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 solution effectively detects user interactions with improved sensitivity and power efficiency, reducing wear and tear on mobile devices by mimicking mechanical button feedback through vibrational actuators.
Implementation Method 1
a measurement circuit communicatively coupled to the resistive-inductive-capacitive sensor and configured to at a plurality of periodic intervals, measure phase information associated with the resistive-inductive-capacitive sensor and based on the phase information, determine a displacement of a mechanical member
Implementation Method 2
a driver configured to drive the resistive-inductive-capacitive sensor at a driving frequency and a driving amplitude, wherein at least one of the driving frequency and the driving amplitude varies among the plurality of periodic intervals
Implementation Method 3
a linear resonant actuator may vibrate in response to user interaction with the human-machine interface to mimic to the user the feel of a mechanical button click
Data Source
AI summary
A system may include a resistive-inductive-capacitive sensor, a measurement circuit communicatively coupled to the resistive-inductive-capacitive sensor and configured to at a plurality of periodic intervals, measure phase information associated with the resistive-inductive-capacitive sensor and based on the phase information, determine a displacement of a mechanical member relative to the resistive-inductive-capacitive sensor. The system may also include a driver configured to drive the resistive-inductive-capacitive sensor at a driving frequency and a driving amplitude, wherein at least one of the driving frequency and the driving amplitude varies among the plurality of periodic intervals.