Wearable Electrode Circuit for Capacitance-Based Wearing Detection

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Solution Overview

Problem

Smart wearable electronic devices face issues with inaccurate biological information detection due to improper wearing and lack of security mechanisms, as they can be used for unauthorized transactions if stolen.

Innovation Solution

Incorporating electrodes with capacitance calculating and determining circuits to detect wearing and touch states, allowing for improved wearing detection and enhanced security through capacitance variation analysis, while also serving as data and charging ports to reduce device size.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If smart wearable electronic device is used for mobile payment and biological information detection, then device functionality is improved, but security risk increases due to lack of wearing state detection

Engineering Contradiction:

Improvedevice functionalityVSAvoidsecurity

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent implements feedback by continuously monitoring capacitance values from electrodes and comparing them against predetermined thresholds to determine wearing state. The system provides real-time feedback on whether the device is properly worn, enabling dynamic security control - allowing payment functions when worn correctly and blocking unauthorized access when stolen or improperly used

Inventive Principle:

Principle #23Feedback

2Adaptability or versatility

If separate electrodes and ports are integrated into the electronic device, then device functionality is improved, but device size increases

Engineering Contradiction:

Improvedevice functionalityVSAvoiddevice size

Core Design Contradiction:

Adaptability or versatilityVSVolume of moving object

Solution Approach 1:

The patent merges the functions of electrodes and ports by making the same physical components serve dual purposes. The electrodes used for capacitance-based wearing detection are simultaneously used as data ports and charging ports, eliminating the need for separate dedicated components and reducing overall device size

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent implements multi-functionality where the electrodes serve multiple functions: they act as sensing elements for wearing state detection through capacitance measurement, and simultaneously function as data transmission ports and charging ports, maximizing the utility of each component

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 addresses improper wearing issues and provides a secure mechanism to prevent unauthorized use, enhancing the accuracy of biological data collection and reducing device size through integrated port and electrode functionality.

Implementation Method 1

a capacitance calculating circuit, coupled to the electrode, configured to calculate a capacitance variation generated by at least one of the electrode

Methodology Applied

Scientific EffectCapacitance variation: Capacitance

Data Source

PatentUS11051758B2Electronic device capable of detecting wearing state or touching state

Publication Date: 2021.07.06 PIXART IMAGING INC

AI summary

A wearable electronic device with a function of detecting a wearing state, comprising: at least one electrode; a capacitance calculating circuit, coupled to the electrode, configured to calculate a capacitance variation generated by at least one of the electrode; and a wearing state determining circuit, coupled to the capacitance calculating circuit, configured to determine the wearing state according to the capacitance variation. By this way, the wearing state can be auto detected and the wearable electronic device can be correspondingly control according to the wearing state.