Biometric Sensor with Protruding Optical Unit
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing biometric information detecting apparatuses often face challenges in simultaneously measuring optical and pressure pulse waves from the same location on a subject's body, leading to potential measurement errors due to differences in waveforms and contact pressures.
Innovation Solution
A biometric information detecting apparatus is designed with a pressure pulse wave measuring unit and an optical pulse wave measuring unit, where the optical pulse wave measuring unit protrudes above the fixing unit to directly contact the subject's body, allowing simultaneous measurement of both signals from the same region, using a flexible material for the pressure pulse wave measuring unit and a rigid printed circuit board for the fixing unit, with conductive patterns for signal transmission and power supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the optical pulse wave measuring unit and pressure pulse wave measuring unit are positioned separately, then the device structure is simpler, but measurement errors increase due to waveform and contact pressure differences
Solution Approach 1:
The patent combines the optical pulse wave measuring unit and pressure pulse wave measuring unit into a single integrated device structure. The optical measuring unit is disposed on the pressure measuring unit, allowing both measurements to be taken from the same body location simultaneously, thereby improving measurement accuracy while maintaining a unified device design
2Measurement precision
If the optical pulse wave measuring unit protrudes above the fixing unit, then direct contact with the subject's body is achieved for accurate measurement, but the device structure becomes more complex
Solution Approach 1:
The optical pulse wave measuring unit is designed to protrude locally above the fixing unit at the specific contact point with the subject's body. This localized protrusion enables direct contact measurement at the critical measurement point while the rest of the device structure remains integrated and relatively simple
3Ease of operation
If the pressure pulse wave measuring unit is made of flexible material, then it can conform to the body surface for better contact, but manufacturing precision becomes more difficult to control
Solution Approach 1:
The pressure pulse wave measuring unit is constructed using flexible printed circuit board (FPCB) technology, which provides the necessary flexibility to conform to body surfaces while maintaining controlled manufacturing precision through standardized flexible circuit board fabrication processes
4Stability of the object's composition
If the fixing unit uses a rigid printed circuit board, then structural stability is improved, but adaptability to different body shapes is reduced
Solution Approach 1:
The device is segmented into distinct functional units: a rigid fixing unit (RPCB) providing structural stability and support, and a flexible pressure measuring unit (FPCB) providing adaptability. This segmentation allows each component to fulfill its specific functional requirements while working together as an integrated system
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 minimizes measurement errors by allowing precise simultaneous measurement of pressure and optical pulse waves from the same body location, enhancing the accuracy of biometric information detection.
Implementation Method 1
an optical pulse wave measuring unit disposed on the pressure pulse wave measuring unit... An upper surface of the optical pulse wave measuring unit may be configured to directly contact a subject's body
Implementation Method 2
a pressure pulse wave measuring unit that is connected to the fixing unit... The pressure pulse wave measuring unit may be formed of a flexible material
Data Source
AI summary
A biometric information detecting apparatus is provided. The biometric information detecting apparatus includes a fixing unit disposed on a lower structure, and a pressure pulse wave measuring unit that is supported by the fixing unit and separate from the lower structure. An optical pulse wave measuring unit is disposed on the pressure pulse wave measuring unit. The optical pulse wave measuring unit may contact a surface of a subject's body. A pressure pulse wave of the subject's body may be measured by the pressure pulse wave measuring unit and an optical pulse wave of the subject's body may be measured by the optical pulse wave measuring unit, at the same time.