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 light source and optical sensor on flexible substrates, where one end of the optical sensor overlaps one end of the flexible substrate, 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 and optical sensor onto a single flexible substrate, eliminating the need for separate fixation structures. This integration reduces the overall housing volume while still accommodating all necessary components (light source, battery, optical sensor) as required by the technical problem.
2Volume of moving object
If components are arranged in a compact configuration, then the housing size is reduced, but detection sensitivity may be compromised due to increased noise
Solution Approach 1:
The patent employs a flexible substrate with thin-film structures to mount the light source and optical sensor. This flexible film approach enables compact component arrangement while maintaining sufficient spacing and optical pathways to minimize noise interference, thereby preserving detection sensitivity in the reduced housing volume.
3Volume of moving object
If the optical sensor is positioned close to the light source for compactness, then the housing size is reduced, but noise from the light source may interfere with optical detection
Solution Approach 1:
The patent segments the flexible substrate into distinct functional regions, separating the light source mounting area from the optical sensor detection area. This spatial segmentation on the flexible substrate allows compact overall arrangement while maintaining sufficient optical isolation to prevent light source noise from interfering with the optical sensor's detection capability.
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 pulse waves, vascular patterns, and blood oxygen saturation levels.
Implementation Method 1
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; 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.