Biometric Detection Device Using Segmented Light Guides
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Solution Overview
Problem
Conventional biometric detection devices worn on the human body face challenges in measurement accuracy due to the need for a fingertip to be in contact with both optical fibers, which can reduce accuracy based on contact position and state.
Innovation Solution
A detection device with a housing containing a light source, optical sensor, and line-shaped first and second light guides that project from the housing to make point contact with the skin, allowing for improved biometric information measurement by guiding light from the source to the sensor across multiple points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If conventional detectors use two optical fibers requiring fingertip contact with both fibers, then the detection area is widened, but the measurement accuracy is reduced due to contact position and state variations
Solution Approach 1:
The invention divides the contact interface into multiple discrete light guide units (first and second light guides) that make point contact with the skin. Each light guide pair operates independently at its contact point, segmenting the detection function across multiple locations rather than requiring simultaneous contact with two fibers at a single point. This segmentation allows the detection area to be widened through multiple contact points while maintaining measurement accuracy at each individual contact point.
2Reliability
If the device requires fingertip contact with both optical fibers simultaneously, then biometric information can be detected, but the physical restraint on the user increases
Solution Approach 1:
The detection function is segmented into multiple independent light guide pairs, each capable of detecting biometric information through point contact. This allows the device to maintain detection capability while distributing the contact requirements across multiple locations, reducing the physical restraint compared to requiring simultaneous contact with two fibers at a single point.
Solution Approach 2:
Each light guide pair is designed to make localized point contact with the skin, concentrating the detection function at specific contact points rather than requiring broad simultaneous contact. This local quality approach maintains reliable detection at each contact point while improving overall wearability by reducing the total contact area required.
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 device enhances measurement accuracy and wearability by allowing point contact of light guides with the skin, reducing physical restraint and improving the irradiation area, thus providing more precise biometric data collection.
Implementation Method 1
a plurality of line-shaped first light guides provided in the housing and capable of guiding light emitted by the light source
Data Source
AI summary
A detection device includes a housing, a light source provided in the housing, an optical sensor provided in the housing, a plurality of line-shaped first light guides provided in the housing and capable of guiding light emitted by the light source, and a plurality of line-shaped second light guides provided in the housing and capable of receiving the light guided by the first light guides and guiding the received light to the optical sensor.