Wearable Optical Sensor Laser Array for Blood Sugar Detection

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Solution Overview

Problem

Existing electronic devices face challenges in accurately measuring biometric information, particularly blood sugar levels, due to limitations in light intensity and wavelength coverage by optical sensors, which affect signal-to-noise ratio and measurement accuracy.

Innovation Solution

The device employs a semiconductor optical amplifier to divide the output wavelength band into multiple laser lights with designated power and wavelength, using a fixed array distributed Bragg reflector to modify wavelengths, and an output coupler to adjust direction and angle, thereby improving accuracy and signal-to-noise ratio in biometric measurements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If each light source covers wavelengths of wider band, then the coverage range is improved, but the intensity of the output light becomes lower than reference

Engineering Contradiction:

Improvewavelength coverage rangeVSAvoidlight intensity

Core Design Contradiction:

Adaptability or versatilityVSIllumination intensity

Solution Approach 1:

The patent divides the broadband light source into multiple discrete wavelength bands using a diffraction grating. Instead of using a single light source covering a wide spectrum, the system segments the spectrum into multiple narrow bands, each illuminated by a separate light source. This segmentation allows each light source to operate at high intensity while collectively covering a broad wavelength range, resolving the contradiction between wide coverage and high intensity.

Inventive Principle:

Principle #1Segmentation

2Illumination intensity

If increasing the intensity (power) of light emitted from each light source beyond reference, then the light intensity is improved, but the range of wavelengths that each light source may cover is reduced

Engineering Contradiction:

Improvelight intensityVSAvoidwavelength coverage range

Core Design Contradiction:

Illumination intensityVSAdaptability or versatility

Solution Approach 1:

The patent employs multiple light sources that collectively perform the function of a single broadband source. Each light source is specialized for a specific wavelength band, but the combination of all light sources provides universal coverage across the entire spectrum. This multi-functionality approach allows each individual source to operate at high intensity while the system as a whole maintains broad wavelength coverage.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Adaptability or versatility

If using optical sensor to detect blood sugar noninvasively, then the measurement capability is improved, but the measurement accuracy is affected by signal-to-noise ratio limitations

Engineering Contradiction:

Improvebiometric detection capabilityVSAvoidmeasurement accuracy

Core Design Contradiction:

Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

The patent applies local quality by matching specific wavelength bands to specific biometric parameters being measured. Different wavelengths are optimized for different absorption characteristics of blood components, allowing the system to target specific measurements with appropriate wavelength selection. This localized optimization of wavelength-to-measurement pairing improves signal-to-noise ratio and measurement accuracy for each specific biometric parameter.

Inventive Principle:

Principle #3Local quality

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 and signal-to-noise ratio of biometric measurements, particularly in detecting blood sugar levels, by optimizing light power and wavelength distribution for improved measurement precision.

Implementation Method 1

a semiconductor optical amplifier configured to divide an outputtable wavelength band to output multiple laser lights having a designated wavelength band and designated power

Methodology Applied

Scientific EffectLight amplification by stimulated emission of radiation (LASER): Laser

Implementation Method 2

a fixed array distributed Bragg reflector (DBR) grating configured to modify a wavelength of the multiple laser lights and output multiple laser lights having a modified wavelength

Methodology Applied

Scientific EffectBragg diffraction: Bragg Diffraction

Implementation Method 3

a fixed array distributed Bragg reflector (DBR) grating configured to modify a wavelength of the multiple laser lights

Methodology Applied

Scientific EffectDiffraction grating: Diffraction Grating

Data Source

PatentEP4717170A1Electronic device and wearable device

Publication Date: 2026.04.01 SAMSUNG ELECTRONICS CO LTD

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AI summary

The electronic device of the disclosure may include a semiconductor optical amplifier configured to divide an outputtable wavelength band and output multiple laser lights having a designated wavelength band and designated power, a fixed array distributed Bragg reflector (DBR) grating configured to modify a wavelength of the multiple laser lights and output multiple laser lights having a modified wavelength, and an output coupler configured to allow the modulated multiple laser lights to adjust an output direction and/or angle and output the modulated multiple laser lights to an outside of the electronic device.