Optical Sensor Array Dynamic Element Selection for Biometric Signal Accuracy
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Solution Overview
Problem
Existing electronic devices face challenges in accurately measuring biometric signals due to motion artifacts and peripheral noise when using optical sensors, especially during user movement and indirect skin contact, which affects the reliability of biometric data.
Innovation Solution
The electronic device employs a configuration with multiple light emitting units and light receiving units, where a processor selects specific light emitting elements based on user information to output light and receive reflected light, comparing signals from different units to determine and correct for noise, thereby improving signal accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple light emitting elements are used to improve signal accuracy, then measurement precision is improved, but power consumption increases
Solution Approach 1:
The patent dynamically selects and activates specific light emitting elements based on real-time measurement requirements and signal quality assessment. The system transitions from a static configuration where all elements are active to a dynamic configuration where only necessary elements are activated, thereby reducing power consumption while maintaining measurement precision.
Solution Approach 2:
The system changes operational parameters by adjusting which light emitting elements are active based on user information and measurement conditions. This parameter change allows the system to optimize the balance between power consumption and signal accuracy by selecting appropriate subsets of light emitting elements for different measurement scenarios.
2Reliability
If motion artifact and peripheral noise are removed using acceleration sensor and structural changes, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent implements a feedback mechanism where the system continuously monitors biometric signals for noise and motion artifacts, then automatically adjusts measurement parameters or selects alternative light emitting elements to compensate. This feedback loop improves reliability by dynamically correcting signal quality issues without requiring complex additional hardware.
Solution Approach 2:
The system performs self-diagnosis and self-correction by detecting noise and motion artifacts in the biometric signals and automatically adjusting its operation to remove these interferenc The system uses the existing optical sensor array to identify and compensate for noise sources without requiring external intervention or complex additional sensors.
3Measurement precision
If light emitting elements are selected based on user information, then measurement precision is improved, but processing time increases
Solution Approach 1:
The patent performs preliminary organization of user information and pre-establishes selection criteria for light emitting elements before actual measurement begins. By preparing reference data and selection algorithms in advance, the system minimizes processing time during actual measurement while still achieving precise element selection based on user characteristics.
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 reduces power consumption and enhances the accuracy of biometric signal measurement by effectively compensating for motion artifacts and peripheral noise, leading to more reliable user data.
Implementation Method 1
a light emitting unit comprising a plurality of first light emitting elements configured to output first light including a first wavelength
Implementation Method 2
control the first light receiving unit and the second light receiving unit to receive at least some of light reflected by the living body among the output light
Data Source
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AI summary
An electronic device includes a light emitting unit, including a first light emitting element and a second light emitting element; and a plurality of light receiving units disposed in a structure that encloses the light emitting unit, wherein the first light emitting element and the second light emitting element are disposed in a separated state based on a radiation area related to the light emitting unit in a designated distance range. Various embodiments are available.