Biological Signal Detection with Variable Light Emission Angles
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Solution Overview
Problem
Existing non-invasive methods for detecting biological information face challenges in ensuring accuracy and precision, leading to unreliable results.
Innovation Solution
The use of a biological signal measurement unit with multiple light emission elements having different light emission angles, combined with a data processor to select signals with high signal-to-noise ratios, allows for improved detection accuracy and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a non-invasive method is used to detect biological information, then the detection process is simple and painless for the subject, but the accuracy and precision of the detection results deteriorate
Solution Approach 1:
The light emission portion is divided into multiple light emission elements (first and second light emission elements) with different light emission angles. Each element independently illuminates the subject from different angles, and the photodetector receives reflected light from each element separately. This segmentation allows the system to maintain non-invasive operation while improving measurement precision through multi-angle optical measurements
Solution Approach 2:
Different light emission elements are assigned different light emission angles (first element: 0° to 90°, second element: 80° to 180°) to create localized illumination patterns with different qualities. The first element provides narrow-angle illumination for precise directional measurement, while the second element provides wide-angle illumination for comprehensive tissue interaction. This local quality differentiation enables the non-invasive system to achieve high detection accuracy
2Measurement precision
If multiple light emission elements with different light emission angles are used, then the detection accuracy and reliability improve, but the device complexity increases
Solution Approach 1:
Multiple light emission elements with different light emission angles are merged into a single integrated light emission portion. The first light emission element (e.g., laser diode with 0°-90° angle) and second light emission element (e.g., LED with 80°-180° angle) are combined in one module, sharing common control circuitry and housing. This merging approach improves detection accuracy through multi-angle measurements while minimizing the increase in device complexity through integrated design
Solution Approach 2:
The light emission portion is designed with multi-functionality by incorporating both first and second light emission elements that can operate independently or in combination. A single light emission portion serves multiple functions: narrow-angle illumination for precise measurements, wide-angle illumination for comprehensive tissue interaction, and the ability to select appropriate emission patterns based on measurement requirements. This universality improves detection accuracy without proportionally increasing device complexity
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 approach enhances the accuracy and reliability of biological information detection by optimizing light emission angles and signal processing, regardless of the distance between the measurement unit and the subject.
Implementation Method 1
a light emission portion and a photodetector, the light emission portion including at least two light emission elements having light emission angles of different sizes, the photodetector being configured to detect light generated by the light emission portion and modulated by a subject
Data Source
AI summary
Provided are apparatuses and methods for detecting biological information. An apparatus for detecting biological information may include a biological signal measurement unit having at least two light emission elements having different light emission angles. The at least two light emission elements may include different types of light sources. The at least two light emission elements may include multiple light sources of the same type, and in this case, an optical element configured to adjust a light emission angle of one of the light sources may be provided. The apparatus for detecting biological information may include a biological signal measurement unit including a light emitting unit having variable light emission angle. The apparatus for detecting biological information may further include a data processor configured to extract and analyze biological information of a subject from data measured by the biological signal measurement unit.