Optical Sensor Isolation for Wearable Motion Artifact Reduction
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Solution Overview
Problem
Conventional smart wearable devices lack mechanisms to mitigate motion artifacts that interfere with biological information measurement, such as heart rate and blood pressure monitoring, due to unnecessary light reception during user movement.
Innovation Solution
An optical data sensing device with a first light emitting device configured to emit light away from the optical sensor and a first opaque isolation component between the sensor and the light emitting device, reducing unnecessary light reception, and optionally featuring multiple light emitting devices and isolation components to manage light in different directions and wavelengths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional smart wearable devices are used for biological information measurement, then the device structure remains simple, but motion artifacts cause measurement inaccuracy due to unnecessary light reception
Solution Approach 1:
An opaque isolation component is introduced as an intermediary element positioned between the optical sensor and the first light emitting device. This mediator blocks unnecessary light from reaching the optical sensor, thereby improving measurement accuracy without significantly complicating the overall device structure. The isolation component acts as a simple yet effective barrier that addresses the motion artifact issue.
2Measurement precision
If light emitting devices emit light in multiple directions for different wavelengths, then measurement accuracy improves, but the device structure becomes more complex with multiple isolation components needed
Solution Approach 1:
The light isolation function is segmented by introducing separate opaque isolation components for different light emitting devices. The first opaque isolation component is positioned between the optical sensor and the first light emitting device, while a second opaque isolation component is positioned between the optical sensor and the second light emitting device. This segmentation allows each isolation component to specifically manage light from its corresponding light emitting device, improving measurement accuracy for different wavelengths while maintaining clear functional separation.
3Measurement precision
If opaque isolation components are added to block unnecessary light, then measurement accuracy improves, but the device occupies more space
Solution Approach 1:
The opaque isolation component is designed as a thin film or plate structure that effectively blocks light while occupying minimal space. This thin-film approach allows the isolation function to be integrated into the existing device architecture without significantly increasing the overall device volume. The isolation component can be positioned adjacent to the optical sensor or light emitting devices, providing effective light blocking in a space-efficient manner.
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 improves the accuracy of biological information measurement by preventing non-necessary light from entering the optical sensor, thereby reducing motion artifact interference and enhancing measurement precision.
Implementation Method 1
a first opaque isolation component, located between the optical sensor and the first light emitting device, configured to reduce the first light received by the optical sensor
Implementation Method 2
an optical sensor; a first light emitting device, configured to emit first light away from the optical sensor
Data Source
AI summary
An optical data sensing device of a biological information measuring device, comprising: an optical sensor; a first light emitting device, configured to emit first light away from the optical sensor; and a first opaque isolation component, located between the optical sensor and the first light emitting device, configured to reduce the first light received by the optical sensor. The present invention also discloses an optical data sensing device comprising a plurality of light emitting devices with different emitting directions or wavelengths, to improve the accuracy of biological information measuring.