Flexible Earcup Capacitive Sensing for Accurate On-Head Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current on-head detection solutions for headsets are not sufficiently precise and adaptable to different user head and ear shapes, leading to potential false positives and reduced power efficiency.
Innovation Solution
A headset with flexible electrically conductive sense electrodes in the earcups that deform to maintain constant proximity to the user's head or ear, allowing for precise capacitive data collection and adaptable on-head detection, featuring a conductive textile cover layer for improved capacitive coupling and comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a rigid sense electrode is used in the earcup, then the manufacturing precision and structural stability are improved, but the adaptability to different head and ear shapes deteriorates
Solution Approach 1:
The sense electrode is formed from a flexible electrically conductive material that can deform to conform to different head and ear shapes while maintaining electrical functionality. This flexible material allows the electrode to adapt to various anatomical structures without requiring rigid mechanical components, thereby resolving the contradiction between structural stability and adaptability.
Solution Approach 2:
The patent changes the physical state of the sense electrode from rigid to flexible by selecting appropriate electrically conductive materials with suitable mechanical properties. This parameter change enables the electrode to dynamically adjust its shape while maintaining electrical conductivity, thus achieving both structural stability and adaptability to different users.
2Measurement precision
If the sense electrode maintains constant distance to the head, then the measurement precision of capacitive data is improved, but the device complexity increases
Solution Approach 1:
The flexible nature of the sense electrode material allows it to naturally conform to the head's surface contours, maintaining a consistent proximity without requiring additional mechanical adjustment mechanisms. This eliminates the need for complex actuation systems while achieving precise capacitive measurements through the electrode's inherent flexibility and adaptability.
3Adaptability or versatility
If the flexible material deforms to adapt to head shape, then the adaptability is improved, but the manufacturing precision may deteriorate
Solution Approach 1:
The patent selects flexible electrically conductive materials with specific mechanical and electrical properties that allow deformation while maintaining sufficient positioning precision. By carefully controlling material parameters such as flexibility, conductivity, and thickness, the electrode can adapt to different head shapes while retaining adequate manufacturing precision for reliable capacitive sensing.
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
Enhances the accuracy of on-head detection, reduces false positives, and maintains comfort by adapting to various head and ear shapes, thereby optimizing power management and user experience.
Implementation Method 1
the first sense electrode is configured for obtaining first capacitive data indicative of whether the first earcup is on-head or off-head
Data Source
AI summary
The present disclosure relates to a headset with first earcup comprising a first electrically conductive material forming a first sense electrode. The first sense electrode is configured for capacitively-coupling to skin of a user of the headset when the user is wearing the headset. The first electrically conductive material is a flexible material configured to deform dependent on a head shape and/or an ear shape of a user of the headset when the user is wearing the headset.