Optical Sensor with Concentric Light Receiving Groups for Bio-Information Estimation
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Solution Overview
Problem
Current bio-signal monitoring technologies face challenges in accurately estimating bio-information non-invasively and conveniently, especially in daily life settings, due to limitations in sensor design and functionality for wearable devices.
Innovation Solution
An optical sensor apparatus with a light emitter and multiple light receiving groups arranged on concentric circles, driven by a processor to select the appropriate group based on the type of bio-information to be estimated, optimizing detection distances and angles for improved accuracy and reduced measurement deviations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple light receiving groups are arranged on concentric circles at different distances from the light emitter, then the accuracy of bio-information estimation is improved by optimizing detection distances and angles, but the device complexity increases due to the need to selectively drive different light receiving groups based on the type of bio-information
Solution Approach 1:
The light receiving unit is segmented into multiple light receiving groups arranged on concentric circles at different distances from the light emitter. Each group contains detectors positioned at specific radial distances, allowing selective activation of appropriate groups based on the type of bio-information to be measured, thereby optimizing measurement accuracy for different parameters while managing system complexity through modular organization
Solution Approach 2:
The system dynamically selects and drives different light receiving groups based on the type of bio-information to be estimated. The processor determines which light receiving group to activate according to the measurement requirements, enabling adaptive optimization of detection distances and angles for different bio-information types such as oxygen saturation, heart rate, or glucose levels
2Measurement precision
If detectors are arranged on concentric circles at optimized distances and angles, then the impact of skin pigment inhomogeneities is reduced and measurement accuracy is improved, but the area occupied by the sensor increases
Solution Approach 1:
The detector arrangement transitions from a single linear array to a two-dimensional concentric circular pattern around the light emitter. Detectors are positioned at multiple radial distances (smallest circle radius ≥2mm, largest circle radius ≤6mm) and angular positions, creating optimized detection paths that reduce skin pigment inhomogeneity effects while maintaining a compact footprint suitable for wearable devices
3Adaptability or versatility
If multiple light receiving groups with different detector arrangements are used, then the versatility of bio-information estimation is improved, but the manufacturing complexity increases
Solution Approach 1:
The optical sensor is designed with multiple light receiving groups that can estimate various types of bio-information including oxygen saturation, heart rate, blood glucose, and other physiological parameters. The processor selectively drives appropriate light receiving groups based on the desired measurement type, enabling a single device to perform multiple bio-information estimation functions using different detector arrangements and optical paths
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 enhances the accuracy of bio-information estimation by optimizing detection distances and angles, reducing the impact of skin pigment inhomogeneities and improving user convenience through efficient use of sensor space, leading to precise and reliable monitoring of bio-signals in various daily life scenarios.
Implementation Method 1
a light emitter disposed on a substrate, and a plurality of light receiving groups which are arranged on a plurality of concentric circles on the substrate
Implementation Method 2
estimate the bio-information of an object based on optical signals detected by the driven light receiving group
Data Source
AI summary
An apparatus for estimating bio-information may include an optical sensor comprising a light emitter disposed on a substrate, and a plurality of light receiving groups which are arranged on a plurality of concentric circles on the substrate, at different distances from the light emitter, respectively, and a processor configured to drive one of the plurality of light receiving groups that is selected based on a type of the bio-information to be estimated, and estimate the bio-information of an object based on optical signals detected by the driven light receiving group.