Annular Flexible Substrate Layout for Compact Biometric Sensing
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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 accommodate these components efficiently.
Innovation Solution
A detection device with an annular housing that includes a first flexible substrate with a battery, light source, and coil, and a second flexible substrate with an optical sensor, where the optical sensor overlaps one end of the first substrate and is electrically coupled, with the coil positioned between the light source and this end, allowing for a compact and efficient arrangement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a light source, battery, and optical sensor are separately fixed and accommodated in an annular housing, then each component can be independently assembled, but the housing becomes larger and more bulky
Solution Approach 1:
The patent merges the battery and optical sensor onto the same flexible substrate as the light source, creating an integrated component arrangement. This consolidation eliminates the need for separate housing spaces for each component, thereby reducing the overall housing volume while maintaining independent assembly capabilities through the flexible substrate design.
Solution Approach 2:
The patent utilizes the flexible substrate to arrange components in a multi-dimensional layout rather than a simple linear sequence. By folding and overlapping the substrate, the battery, optical sensor, and light source are packed into a compact three-dimensional configuration within the annular housing, significantly reducing the required housing volume.
2Measurement precision
If components are arranged to maximize detection sensitivity, then measurement precision improves, but device complexity increases
Solution Approach 1:
The patent segments the detection device into distinct functional modules: the light source module, the optical sensor module, and the battery module, each positioned on specific regions of the flexible substrate. This segmentation allows each module to be optimized for its specific function while maintaining overall system simplicity through modular assembly on the flexible substrate.
Solution Approach 2:
The patent applies local quality by positioning the coil specifically in the region between the light source and optical sensor on the flexible substrate, creating a localized electromagnetic coupling zone. This targeted placement optimizes wireless charging efficiency without interfering with the optical detection path, thereby maintaining high measurement precision while managing device complexity through localized functional zones.
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 solution enables a compact, wearable detection device that effectively detects biometric information such as pulse waves, vascular patterns, and blood oxygen saturation levels with improved sensitivity and reduced noise, facilitating accurate and efficient operation.
Implementation Method 1
a coil to charge the battery provided on the first flexible substrate
Implementation Method 2
an optical sensor including a second flexible substrate and a plurality of photodiodes provided in a detection area of the second flexible substrate
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 the first flexible substrate; a light source provided on the first flexible substrate; a coil to charge the battery provided on the first flexible substrate; and an optical sensor including a second flexible substrate and a plurality of photodiodes provided in a detection area of the second flexible substrate. One end of the second flexible substrate of the optical sensor overlaps one end of the first flexible substrate, and the second flexible substrate is electrically coupled to the first flexible substrate. The coil is disposed in a position that is different from those of the one end of the first flexible substrate and the light source and is between the one end of the first flexible substrate and the light source.