Annular Optical Sensor Layout for Compact Biometric Detection
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Solution Overview
Problem
Existing detection devices that incorporate a light source, battery, and optical sensor in an annular housing are bulky due to separate fixation, necessitating a compact design that can easily accommodate these components.
Innovation Solution
A detection device with an annular housing that integrates a flexible substrate with a light source, optical sensor, and battery, where the optical sensor includes multiple photodiodes, and a control circuit, allowing for a compact and efficient arrangement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a light source, battery, and optical sensor are separately fixed and accommodated in an annular housing, then the device can accommodate all necessary components, but the housing is formed to be larger
Solution Approach 1:
The patent merges the light source, battery, and optical sensor onto a single flexible substrate, eliminating the need for separate fixation structures. The flexible substrate serves as an integrated platform that accommodates all components in a compact arrangement, significantly reducing the overall housing volume while maintaining all necessary functional elements.
Solution Approach 2:
The patent utilizes the flexible substrate to arrange components in a two-dimensional planar layout rather than requiring three-dimensional stacking or separate compartments. This dimensional approach allows the light source, battery, and optical sensor to be positioned adjacent to each other on the same plane, minimizing the housing volume while accommodating all components.
2Volume of moving object
If components are arranged in a compact configuration, then the housing size is reduced, but the distance between components increases
Solution Approach 1:
The patent segments the flexible substrate into distinct regions for the light source, battery, and optical sensor, allowing each component to be positioned in its own designated area. This segmentation enables compact arrangement while maintaining optimal distances between components through careful spatial distribution on the substrate surface.
Solution Approach 2:
The patent applies local quality by positioning components at specific locations on the flexible substrate where they can be optimally spaced. The light source, battery, and optical sensor are arranged in a configuration that balances compact housing size with appropriate component distances, using the flexible substrate's properties to achieve this local optimization.
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 compact design reduces unnecessary noise and improves detection sensitivity by minimizing the distance between components, enabling accurate biometric information detection, such as blood oxygen saturation and vascular patterns, with enhanced signal-to-noise ratio and reduced detection time.
Implementation Method 1
an optical sensor that is provided in a second area different from the first area of the second surface of the first flexible substrate and includes a plurality of photodiodes
Data Source
AI summary
According to an aspect, a detection device includes: an annular housing; a first flexible substrate provided along a shape of the annular housing; a battery provided on a first surface of the first flexible substrate; a light source provided in a first area of a second surface of the first flexible substrate opposite the first surface; and an optical sensor that is provided in a second area different from the first area of the second surface of the first flexible substrate and includes a plurality of photodiodes.