Structural Member Capacitive Sensing for Wearable Space Constraints
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Solution Overview
Problem
Wearable electronic devices face challenges in incorporating capacitive proximity sensors due to space constraints and environmental variability, which affect sensor durability and reliability.
Innovation Solution
Incorporating a structural member within the device that serves as a capacitive proximity sensor, combining structural strength with sensing capabilities, using an electrically conductive material to collect charge and detect proximity to the user's body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate capacitive proximity sensor is incorporated into the wearable device, then proximity sensing capability is improved, but device complexity and space requirements increase
Solution Approach 1:
The patent combines the structural member (which provides mechanical support and housing) with the capacitive sensing element into a single integrated component. The structural member itself is configured with conductive properties and capacitive geometry to serve as the proximity sensor electrode, eliminating the need for separate sensor components while maintaining sensing functionality.
Solution Approach 2:
The structural member is designed to perform multiple functions simultaneously: it provides structural support and protection for internal components, while also serving as the capacitive sensing element for proximity detection. This multi-functionality reduces overall device complexity and component count.
2Reliability
If traditional separate sensor components are used, then sensing functionality is achieved, but space utilization and device compactness deteriorate
Solution Approach 1:
The capacitive sensing element is merged with the structural member, allowing the sensor functionality to be embedded within the existing structural volume rather than adding separate sensor components. This integration significantly reduces the overall device volume while maintaining sensing capability.
3Adaptability or versatility
If multiple separate components are used for structure and sensing, then functional requirements are met, but manufacturing complexity and assembly difficulty increase
Solution Approach 1:
The structural member and capacitive sensing element are designed as an integrated single component that can be manufactured in one process rather than requiring separate manufacturing and assembly steps. This integration simplifies the supply chain, reduces assembly complexity, and improves manufacturing efficiency.
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 structural member enhances the device's structural integrity while providing reliable capacitive proximity sensing, unaffected by ambient light conditions, thus optimizing space utilization and performance.
Implementation Method 1
the electronic component, and therefore, at least a portion of the structural member, can be used as part of a capacitive proximity sensor
Data Source
AI summary
An electronic device can include a housing, a back cover, a structural member, and a sensing circuit. The housing can at least partially define an internal volume of the electronic device and the back cover can define at least a portion of the internal volume and be connected to the housing. The structural member can be disposed against the back cover and at least partially within the internal volume, the structural member including an electronic component. The sensing circuit can be disposed in the internal volume and electrically coupled to the electronic component. The sensing circuit can detect an amount of charge of the electronic component as part of a user proximity sensor of the electronic device.