Sensor Baseline Correction for Reliable Virtual Button Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing mobile devices face challenges in accurately detecting user interactions with virtual buttons due to issues like sensor sensitivity, power consumption, and the need to differentiate between actual user input and anomalous inputs caused by factors such as aging and temperature drift, which can affect the performance and durability of mechanical buttons.
Innovation Solution
A method and system that includes generating a baseline signal, correcting the input signal by subtracting or adjusting it based on temperature variations, and updating the baseline signal to account for threshold level changes, thereby improving the accuracy of detecting intentional human interactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a sensor is used to detect user interaction with a virtual button, then user interaction can be detected, but sensor drift and temperature variations cause false detections and reduce measurement accuracy
Solution Approach 1:
The system continuously monitors sensor output and compares it against dynamically updated baseline values derived from historical data. When the sensor signal deviates from the baseline by more than a threshold amount, it indicates a genuine user interaction. This feedback mechanism compensates for sensor drift and temperature variations by adapting to changing environmental conditions while maintaining reliable detection of actual user inputs.
Solution Approach 2:
The system pre-establishes baseline sensor values during periods when no user interaction is occurring. These baseline values are stored and used as reference points for detecting future user interactions. By preparing the baseline data in advance, the system can quickly and accurately distinguish between normal sensor variations and genuine user inputs without requiring complex real-time analysis.
2Reliability
If mechanical buttons are used in mobile devices, then user interaction is reliable, but the device cannot be manufactured to be waterproof
Solution Approach 1:
The patent replaces mechanical buttons with virtual buttons implemented through capacitive or force sensors on the touchscreen surface. These sensors detect user interactions through electrical or mechanical field changes rather than physical contact, eliminating the need for physical openings in the device housing. This substitution maintains reliable user interaction detection while enabling seamless waterproof construction, as there are no mechanical components that would compromise the water seal.
3Ease of operation
If mechanical buttons are used, then user interaction is detectable, but they are susceptible to aging and wear that reduces device useful life
Solution Approach 1:
The system replaces mechanical buttons with sensor-based virtual buttons that have no moving parts. The sensors detect user interactions through changes in electrical capacitance or applied force on the touchscreen surface, eliminating mechanical wear and tear. This substitution maintains full user interaction capability while significantly extending device useful life, as there are no mechanical components subject to aging, friction, or degradation from repeated use.
Data Source
AI summary
A method may include receiving an input signal, generating a baseline signal based on the input signal, generating a corrected input signal by subtracting the baseline signal from the input signal, determining a threshold level change of the input signal when the corrected input signal exceeds a level change threshold, and responsive to the threshold level change, updating the baseline signal to the level change threshold.