Display Device Blood Pressure Measurement Using Transfer Function Noise Filtering
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Solution Overview
Problem
Conventional electronic pulse measurement devices for blood pressure are inconvenient due to their separate components, including an independent light source, sensor, and display, which are not integrated with other portable devices.
Innovation Solution
A display device with integrated pressure and photo-sensors generates pulse wave frequency signals, calculates transfer functions to block noise components, and computes blood pressure information, which is then displayed on the device's panel, allowing for accurate blood pressure measurement without additional devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electronic pulse measurement devices use independent light source, sensor, and display components, then measurement function is achieved, but device portability and convenience deteriorate
Solution Approach 1:
The patent integrates the light source, photo sensor, and display into a single display device. The display device includes a light source unit, a sensing unit with pressure sensor and photo sensor, and a display unit all combined in one device, eliminating the need for separate portable pulse measurement devices.
Solution Approach 2:
The display device performs multiple functions including displaying visual information and measuring blood pressure through integrated sensors. The device can function both as a regular display device and as a medical measurement device, providing universal utility.
2Measurement precision
If noise components in pulse wave frequency signals are not filtered, then signal processing is simpler, but measurement precision deteriorates
Solution Approach 1:
The patent introduces a transfer function as an intermediary tool to filter noise components. The transfer function is calculated based on center frequencies and maximum gains of harmonic components, serving as a mediator between the raw pulse wave signal and the final blood pressure measurement.
Solution Approach 2:
The patent changes parameters of the pulse wave frequency signal by filtering out noise components of harmonic components (first to third harmonics) using the transfer function. This parameter change improves signal quality while maintaining manageable processing complexity.
3Adaptability or versatility
If separate portable pulse measurement devices are used, then measurement function is available, but user convenience deteriorates
Solution Approach 1:
The patent combines health monitoring capabilities into existing display devices that users already possess. By integrating pressure sensors and photo sensors into smartphones or tablets, users gain health monitoring functionality without needing to carry or learn separate devices.
Solution Approach 2:
The display device serves itself by using its own display screen as part of the measurement interface and providing results directly on the device. The integrated system performs measurement, processing, and display of results without requiring external equipment.
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 method enables convenient and accurate blood pressure measurement by integrating sensors and display within a single device, improving user experience and reducing the need for separate equipment.
Implementation Method 1
a pulse wave signal that is sensed by a photo-sensor
Implementation Method 2
a pressure measurement value that is sensed by a pressure sensor
Data Source
AI summary
The blood pressure measurement method using a display device includes generating a first pulse wave frequency signal having a magnitude of a pulse wave signal according to a frequency having a fundamental wave component and a harmonics component based on a pressure measurement value and a pulse wave signal, calculating a coefficient of a transfer function based on center frequencies and maximum gains at center frequencies of first harmonics to third harmonics of the first pulse wave frequency signal, generating a second pulse wave frequency signal by blocking noise components of the first harmonics to the third harmonics of the first pulse wave frequency signal based on the transfer function, generating a first pulse wave signal having a magnitude of a pulse wave signal according to a pressure based on the second pulse wave frequency signal, and calculating blood pressure information based on the first pulse wave signal.