Biological Detection Device Using Segmented Light Dot Patterns
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Solution Overview
Problem
Existing remote biological information sensing systems using cameras face challenges in accuracy and stability due to body motion, low reliability of measurement, and the need for complex configurations to separate biological information from surface reflected components.
Innovation Solution
A biological information detection device that projects a light dot pattern onto a living body, detects the pattern using an image capturing device, and separates directly reflected light from inside-body scattered light using signal processing to obtain accurate biological information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a camera is used to detect biological information in a non-contact manner, then the subject's comfort is improved, but the measurement accuracy and stability deteriorate due to body motion
Solution Approach 1:
The patent segments the reflected light into two distinct components: directly reflected light (from surface reflection) and scattered light (from inside the body). By spatially separating these components using multiple image capturing devices positioned at different angles, the system can extract biological information from the scattered light component while excluding the surface reflection component, thereby maintaining measurement accuracy during body motion
Solution Approach 2:
The patent introduces light as an intermediary medium to detect biological information. By projecting light onto the measurement target and analyzing the reflected/scattered light components, the system obtains biological information (such as heartbeat, blood flow) without direct contact, thus improving subject comfort while maintaining measurement capability through optical mediation
2Reliability
If conventional image processing is used to separate biological information from surface reflected components, then the device complexity increases, but the measurement reliability improves
Solution Approach 1:
The patent transitions from two-dimensional image processing to three-dimensional spatial separation by positioning multiple image capturing devices at different angles relative to the light source. This spatial dimensionality change enables direct physical separation of directly reflected light and scattered light components, simplifying the processing requirements compared to conventional two-dimensional image processing methods
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 achieves stable and accurate detection of biological information such as heart rate and blood oxygen saturation without the need for contact, even in the presence of body motion, by effectively separating surface reflected light from inside-body scattered light.
Implementation Method 1
a light source to project pattern onto a target, the pattern being formed by first light, causes a photodetector to detect second light resulting from the projection of the pattern onto the target
Implementation Method 2
determines whether the target is a human skin or not based on the second light
Data Source
AI summary
A device including at least one processor that, in operation, causes a light source to project pattern onto a target, the pattern being formed by first light, causes a photodetector to detect second light resulting from the projection of the pattern onto the target, determines whether the target is a human skin or not based on the second light, performs a biometric authentication of the target, and performs an individual authentication based on the determination whether the target is a human skin and result of the biometric authentication.