Wearable Device Photodiode Grouping for Biometric Extraction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current health monitoring technologies lack efficient and proactive methods for individuals to monitor their health status outside of medical institutions, particularly in preventing diseases through wearable devices that can accurately extract biometric information from the hand.
Innovation Solution
A wearable device comprising a body unit with light emitting diodes and photodiodes configured to emit and detect light, generating electrical signals to extract biometric information such as skin temperature, skin color, and skin hydration degree, and determine the presence of lesions, with a controller managing the light sources and sensors to optimize data extraction based on battery status and measurement accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple photodiodes are arranged in parallel to improve measurement accuracy, then biometric information extraction accuracy is improved, but device complexity increases
Solution Approach 1:
The sensor is segmented into multiple photodiodes (first PD group and second PD group) arranged in parallel, with each photodiode contributing to different aspects of biometric measurement. This segmentation allows the system to capture comprehensive optical signals from the hand while maintaining manageable complexity through modular grouping.
Solution Approach 2:
The parallel photodiode array serves multiple functions simultaneously: measuring skin temperature, skin color, skin hydration degree, and detecting lesions. By making the sensor system multi-functional, the patent improves measurement accuracy across various biometric parameters without requiring separate dedicated sensors for each parameter.
2Measurement precision
If multiple light emitting diodes are used to improve measurement comprehensiveness, then biometric information quality is improved, but energy consumption increases
Solution Approach 1:
The controller manages multiple light emitting diodes to operate in periodic or sequential manner rather than continuously simultaneously. Different LED groups are activated at different times to measure different biometric parameters, which improves measurement comprehensiveness while significantly reducing overall energy consumption compared to continuous operation of all LEDs.
Solution Approach 2:
The system dynamically adjusts which light emitting diodes are active based on measurement requirements and battery status. The controller can adaptively select and activate only the necessary LED subsets for current measurement needs, optimizing the balance between measurement quality and energy consumption.
3Measurement precision
If photodiodes are disposed in opposite directions to improve light detection capability, then optical signal detection accuracy is improved, but manufacturing complexity increases
Solution Approach 1:
The photodiodes are deliberately arranged in asymmetric opposite directions (first PD group and second PD group facing different directions) to optimize optical signal detection from the hand. This asymmetric arrangement allows the sensor to capture light reflections and transmissions from different angles, improving detection accuracy while the patent provides specific manufacturing guidance to manage the complexity.
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
Enables accurate and proactive health monitoring by extracting relevant biometric information from the hand, allowing for early detection of health abnormalities and providing personalized health status monitoring services.
Implementation Method 1
a sensor comprising a plurality of photodiodes disposed on the body unit and configured to generate electrical signals based on the light returning from the subject
Data Source
AI summary
A wearable device includes a body unit to be worn on a subject; a light source comprising a plurality of light emitting diodes and configured to emit light to the subject; a sensor comprising a plurality of photodiodes configured to generate electrical signals based on the light returning from the subject, the plurality of photodiodes being divided into a first photodiode (PD) group and a second PD group, and the photodiodes of the first PD group being disposed to face the photodiodes of the second PD group on the body unit; and a controller configured to extract biometric information of the subject based on the electrical signals generated by the plurality of photodiodes.