Earbud Capacitive Wearing Detection to Prevent False Touch
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing earbud wearing detection systems often misjudge the wearing state due to false touch, leading to inaccurate detection when the earbud is placed on a table or held by hand, which affects energy efficiency and user experience.
Innovation Solution
The implementation of at least two capacitive sensing units positioned at different contact points on the earbud, where the maximum detected capacitance value or the sum of detected values determines the wearing state, reducing false positives and improving accuracy by ensuring both sensors are not simultaneously triggered by external contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single capacitive sensing unit is used for wearing detection, then the structure is simple and cost is low, but false touch causes misjudgment of wearing state
Solution Approach 1:
The patent divides the wearing detection function into multiple independent capacitive sensing units positioned at different locations on the earbud. Each sensing unit independently detects capacitance changes, and the system integrates signals from multiple units to determine wearing state. This segmentation approach reduces false touch misjudgment while maintaining relatively simple individual sensor structures.
Solution Approach 2:
The patent combines multiple capacitive sensing units into a unified wearing detection system where the outputs of individual sensors are integrated and processed together. By merging the detection results from multiple locations, the system achieves more accurate wearing state recognition compared to using a single sensor, while sharing common processing circuitry to control complexity.
2Measurement precision
If optical scheme or infrared sensor scheme is used for wearing detection, then detection accuracy can be improved, but structure design becomes complicated and cost increases
Solution Approach 1:
The patent replaces optical detection schemes and infrared sensor schemes with capacitive sensing technology. Capacitive sensors detect changes in electrical capacitance caused by proximity of human tissue, providing accurate wearing detection without requiring complex optical components, light sources, or infrared detectors. This substitution maintains detection accuracy while significantly simplifying structure and reducing cost.
Solution Approach 2:
The patent changes the detection parameter from optical properties (light reflection, infrared radiation) to electrical capacitance properties. By measuring capacitance changes that occur when the earbud contacts the ear, the system achieves reliable wearing detection using simple capacitive sensing circuits instead of complex optical or infrared systems.
3Device complexity
If capacitance detection scheme is used, then structure is simple and cost is low, but false touch causes misjudgment of wearing state
Solution Approach 1:
The patent segments the capacitive detection system into multiple sensing units positioned at different locations on the earbud. Each unit independently monitors capacitance at its specific position, and the system integrates these distributed measurements. This segmentation maintains the simplicity of capacitive sensing while reducing false touch misjudgment through spatial distribution of sensors.
Solution Approach 2:
The patent introduces signal processing circuitry that acts as an intermediary between the capacitive sensing units and the control system. This intermediary processes raw capacitance signals, applies filtering and thresholding, and integrates multiple sensor outputs to distinguish true wearing events from false touch inputs, thereby improving detection accuracy while keeping individual sensor structures simple.
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
This solution significantly enhances the accuracy of wearing detection, preventing misjudgment and improving energy efficiency by accurately distinguishing between correct wearing and external contact, thus enhancing user experience and battery endurance.
Implementation Method 1
each of the at least two wearing sensors comprises one or more capacitive sensing units
Data Source
AI summary
The present application relates to the field of earbuds, and in particular, to an earbud and a method for implementing a wearing detection and a touch operation. The earbud includes at least two wearing sensors; each of the at least two wearing sensors comprises one or more capacitive sensing units, and a maximum detected capacitance value or a sum of detected capacitance values of the capacitive sensing units of each of the at least two wearing sensors is used as a maximum detection value of the wearing sensor; and the wearing sensors are arranged at different positions where a head of the earbud is in direct contact with skin tissues in the ear, and the earbud is determined to be in a worn state when the maximum detection value of each of the at least two wearing sensors is not smaller than a wearing threshold.