Ear-Mounted Biological Feature Detection Apparatus
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Solution Overview
Problem
Biological feature detection using light reflection theory on smart devices, such as smart earphones, suffers from low accuracy due to a small signal-to-noise ratio in detecting heart rate and blood oxygen levels.
Innovation Solution
A biological feature detection apparatus with a light emitting unit and a light receiving unit is designed to fit specific regions of the ear, such as the tragus inner-side, between the antihelix and helix, or the earlobe, to improve the signal-to-noise ratio by optimizing the placement and configuration of these units, including the use of substrates, optical shielding, and light guiding units, and incorporating a processing circuit for signal conversion and filtering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If light reflection theory is used for biological feature detection on smart devices, then the detection can be performed on convenient locations like the ear, but the signal-to-noise ratio is small resulting in low detection accuracy
Solution Approach 1:
The patent applies local quality by selecting specific regions on the ear with optimal optical properties for detection. The light emitter and receiver are positioned at specific locations (e.g., tragus inner-side region, between antihelix and helix) where the tissue characteristics provide better light interaction, thereby improving signal quality while maintaining the convenience of ear-based detection.
Solution Approach 2:
The patent introduces optical shielding units and light guiding units as intermediary components. The optical shielding unit blocks stray light and external interference, while the light guiding unit directs light precisely between the emitter and receiver through the tissue, thereby improving the signal-to-noise ratio without changing the detection location.
2Measurement precision
If the light emitter and receiver are positioned to fit specific ear regions, then the signal-to-noise ratio is improved, but the device structure becomes more complex
Solution Approach 1:
The patent merges the light emitter, light receiver, optical shielding unit, and light guiding unit into an integrated detection apparatus that fits the ear. By combining these components into a single cohesive structure, the patent improves signal quality while minimizing the increase in device complexity through functional integration.
Solution Approach 2:
The patent employs a nested structure where the light guiding unit and optical shielding unit are positioned within or around the housing that contains the light emitter and receiver. This nesting arrangement allows multiple functional components to be compactly integrated, improving signal-to-noise ratio without proportionally increasing device complexity.
3Reliability
If optical shielding and light guiding units are added, then anti-interference capability is enhanced, but manufacturing complexity increases
Solution Approach 1:
The patent optimizes parameters such as the shape, size, and material properties of the optical shielding and light guiding units to achieve effective light control. By carefully selecting and adjusting these parameters, the patent enhances anti-interference capability while keeping the manufacturing processes within reasonable complexity limits.
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 configuration enhances the accuracy of biological feature detection by improving the signal-to-noise ratio, ensuring a strong anti-interference capability and compatibility with different ear shapes, thus providing reliable heart rate and blood oxygen monitoring.
Implementation Method 1
the light receiving unit is configured to receive the light and perform a photoelectric conversion to generate an original electrical signal for biological feature detection
Data Source
AI summary
A biological feature detection apparatus and an electronic device are provided. The apparatus includes a light emitting unit and a light receiving unit. The light emitting unit is configured to emit light to a detection surface of a biological tissue, the light emitted by the light emitting unit is processed by the biological tissue and then transmitted to the light receiving unit, and the light receiving unit is configured to receive the light and perform a photoelectric conversion to generate an original electrical signal for biological feature detection; the light emitting unit and the light receiving unit are attached to the detection surface of the biological tissue. As such, the signal-to-noise ratio of the original electrical signal is improved and accuracy of biological feature detection is enhanced.