Wearable Device Biometric Sensor Distance Control
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Solution Overview
Problem
Conventional wearable devices fail to provide accurate biometric information due to user motion and ignore body conditions such as skin temperature, leading to skewed data and lack of intuitive change history presentation.
Innovation Solution
Incorporating a distance sensor unit and temperature sensor unit with a controller to adjust biometric data collection based on user motion and skin temperature, using ToF light sources to determine distance and temperature, and a heat providing unit to maintain optimal skin temperature for accurate readings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wearable device continuously obtains biometric information without considering user motion, then the device can provide continuous monitoring, but the biometric information becomes skewed due to unwanted input from user motion
Solution Approach 1:
The patent segments the biometric measurement process into distinct phases: motion detection phase (using acceleration sensors) and biometric measurement phase (using optical sensors). The controller determines whether the wearable device is in a state suitable for biometric measurement based on acceleration data, and only initiates optical measurement when motion is minimized, thereby improving accuracy without requiring continuous complex processing
Solution Approach 2:
The patent performs preliminary motion detection and classification before initiating biometric measurement. The acceleration sensor detects motion patterns in advance, and the controller determines whether the device is in a suitable state for measurement. This preliminary action filters out unwanted motion interference before it can skew the biometric data, improving reliability without adding continuous complexity throughout the entire measurement process
2Reliability
If the wearable device ignores body condition such as skin temperature when obtaining biometric information, then the device structure remains simple, but the biometric information becomes skewed due to body condition effects
Solution Approach 1:
The patent merges multiple sensor functions into an integrated system where the acceleration sensor, optical sensor, and temperature sensor work together under unified controller coordination. The controller combines data from all sensors to determine measurement suitability and adjust measurement parameters, thereby improving biometric accuracy while managing system complexity through functional integration rather than separate independent systems
Solution Approach 2:
The patent implements feedback mechanisms where the controller continuously monitors temperature and motion data, and adjusts the optical measurement process accordingly. When temperature indicates certain body conditions or motion patterns are detected, the controller modifies measurement timing or parameters to compensate for these factors, thereby improving accuracy without requiring overly complex pre-programmed responses for every possible condition
3Ease of operation
If the wearable device simply provides recently obtained biometric information without change history, then the device structure remains simple, but the user cannot intuitively understand biometric changes over time
Solution Approach 1:
The patent performs preliminary organization and structuring of biometric data into change history formats before the user requests information. The controller pre-processes and stores biometric data in an organized manner that enables intuitive presentation, so when the user views history, the data is already structured for easy understanding rather than requiring complex real-time processing during display
Solution Approach 2:
The patent segments biometric data into distinct time-based intervals and categories (e.g., by activity type, time of day, or measurement session). This segmentation allows the system to present comprehensive change history in an organized, digestible format without overwhelming the user with raw continuous data, thereby improving ease of operation through structured presentation
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 intuitive biometric data collection by accounting for user motion and body conditions, reducing noise and improving data accuracy, and providing a history of biometric information to the user.
Implementation Method 1
a first time of flight (ToF) light source configured to output a first signal for determining a distance between a user and the wearable device
Implementation Method 2
a biometric sensor unit configured to output a second signal for determining biometric information of the user and to receive the second signal reflected from the user
Implementation Method 3
a heat providing unit configured to output light for increasing the skin temperature of the user to a skin of the user
Data Source
AI summary
Provided are a wearable device and a method for controlling the same. The wearable device may include a distance sensor unit configured to output a first signal for determining a distance between a user and the wearable device and to receive the first signal reflected from the user. The wearable device may also include a biometric sensor unit configured to output a second signal for determining biometric information of the user and to receive the second signal reflected from the user, and a controller configured to determine the distance based on the received first signal and to obtain the biometric information of the user based on a change in an attribute of the received second signal. The controller may control the biometric sensor unit to output the second signal if the determined distance is equal to or less than a reference distance.