Multi-Wavelength Light Guide Finger Sensor for Physiological Signal Recognition
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Solution Overview
Problem
Current multi-functional recognition equipment for physiological characteristics requires multiple sensors, increasing assembly complexity and material costs, necessitating a more efficient and cost-effective solution for recognizing various physiological signals.
Innovation Solution
A physiological signal processing apparatus utilizing a light-emitting module with multiple light-emitting elements emitting light beams of different wavelengths, a light control module, an image sensing module, and an analyzing module to acquire and analyze image signals from a finger on a light guide panel, allowing for the recognition of multiple physiological characteristics using a single apparatus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple sensors are installed to recognize various physiological characteristics, then the recognition capability is improved, but the assembly complexity and material cost increase
Solution Approach 1:
The patent applies multi-functionality by enabling a single imaging sensor to perform multiple physiological characteristic recognition functions. By using light-emitting elements that emit different wavelengths (visible and infrared light) and processing the reflected light through image signal extraction and analysis, the system can recognize fingerprint information, blood oxygenation levels, and other physiological characteristics simultaneously with one sensor, thereby eliminating the need for multiple dedicated sensors and reducing assembly complexity
2Adaptability or versatility
If multiple sensors are installed to recognize various physiological characteristics, then the recognition capability is improved, but the material cost increases
Solution Approach 1:
The patent reduces material cost by replacing multiple specialized sensors with a single imaging sensor that can detect multiple physiological parameters. The light-emitting elements emit different wavelengths that interact with various physiological characteristics, and the imaging sensor captures reflected light containing information about fingerprint, blood oxygenation, and other characteristics, thereby reducing the quantity of sensor materials needed
Solution Approach 2:
The patent merges the functions of multiple sensors into a single integrated system. By combining the light-emitting elements (capable of emitting different wavelengths) with one imaging sensor and a processing module that extracts and analyzes image signals for different physiological characteristics, the system consolidates what would traditionally require separate sensor assemblies into a unified cost-effective solution
3Measurement precision
If different colored light beams are used to recognize physiological characteristics, then the accuracy and efficiency of recognition is improved, but the device complexity increases
Solution Approach 1:
The patent employs parameter changes by varying the wavelength parameter of the emitted light to optimize recognition accuracy for different physiological characteristics. The light-emitting elements can emit visible light (including different colors) and infrared light, with specific wavelengths selected based on the target physiological parameter being measured, allowing the same hardware to achieve high precision across multiple measurement types
Solution Approach 2:
The patent resolves the complexity issue by using a universal imaging sensor and processing system that handles multiple wavelengths. Rather than requiring separate sensors for each wavelength, the system uses one sensor that can detect reflected light across the visible and infrared spectrum, with software-based extraction and analysis of image signals for different physiological characteristics, thereby maintaining simplicity while achieving multi-functional accuracy
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 approach improves the accuracy and efficiency of recognizing physiological characteristics by using different colored light beams, reducing the need for multiple sensors and simplifying the apparatus structure while lowering material costs.
Implementation Method 1
The image sensing module senses the first light beam and the second light beam reflected by the light guide panel to provide an image signal of the finger
Implementation Method 2
The image sensing module senses the first light beam and the second light beam reflected by the light guide panel
Data Source
AI summary
A physiological signal processing apparatus and a method for the same. The physiological signal processing apparatus includes a first light-emitting element, a second light-emitting element, a light control module, an image sensing module and an analyzing module. The light control module is capable of controlling the first light-emitting element to emit a first light beam and the second light-emitting element to emit a second light beam on a light guide panel for a finger to touch. The image sensing module is capable of sensing the first light beam and the second light beam reflected by the light guide panel and acquiring an image signal of the finger. The analyzing module is capable of analyzing the image signal extracted by the first light beam to acquire a first physiological signal and analyzing the image signal extracted by the second light beam to acquire a second physiological signal.