Display Device Pulse Wave Noise Filtering for Blood Pressure
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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, making them cumbersome for portable use.
Innovation Solution
A display device with sub-pixels emitting different colors of light and a photo-sensor to generate pulse wave signals, which removes noise from these signals using a processor to calculate accurate blood pressure information displayed on the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an independent light source, sensor, and display are used for pulse measurement, then measurement functionality is achieved, but device portability and convenience deteriorate due to separate components
Solution Approach 1:
The patent combines the light source function (sub-pixels), photo-sensor function, and display function into a single integrated display device. The display panel includes both light-emitting sub-pixels and photo-sensors that can detect reflected light, eliminating the need for separate portable measurement devices while maintaining all necessary measurement capabilities.
Solution Approach 2:
The display device performs multiple functions: it displays visual information to the user and simultaneously functions as a pulse measurement device by using its sub-pixels as light sources and photo-sensors as detectors. This multi-functionality allows the display device to replace dedicated pulse measurement devices, improving convenience without adding complexity.
2Measurement precision
If pulse wave signals are measured for blood pressure calculation, then blood pressure information is obtained, but measurement accuracy deteriorates due to noise in the signals
Solution Approach 1:
The processor extracts and removes noise components from the pulse wave signals by comparing signals from different sub-pixels and identifying common noise patterns. This extraction of harmful noise elements allows the system to obtain cleaner pulse wave data for more accurate blood pressure calculation.
Solution Approach 2:
The system uses feedback from multiple sub-pixels to identify and correct noise in the pulse wave signals. By continuously monitoring signals from different wavelengths and comparing them, the processor can detect noise patterns and adjust the measurement data accordingly, improving measurement accuracy through iterative noise cancellation.
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 convenient and accurate blood pressure measurement by integrating light emission and sensing within a display device, improving measurement accuracy by filtering noise from pulse wave signals.
Implementation Method 1
a display panel including first sub-pixels to emit light of a first color, and second sub-pixels to emit light of a second color
Implementation Method 2
a photo-sensor to sense light... generating a first pulse wave signal according to light emitted by the first sub-pixels and sensed by the photo-sensor
Data Source
AI summary
A blood pressure measurement method using a display device including: a display panel including first sub-pixels and second sub-pixels; a pressure sensor to sense a pressure applied from the outside; and a photo-sensor to sense light, includes: generating a first pulse wave signal according to light emitted by the first sub-pixels and sensed by the photo-sensor; generating a second pulse wave signal according to light emitted by the second sub-pixels and sensed by the photo-sensor; generating a third pulse wave signal by removing noise from the second pulse wave signal based on the first pulse wave signal, the second pulse wave signal, and a maximum value of the first pulse wave signal; and calculating blood pressure information based on the third pulse wave signal and a pressure measurement value sensed by the pressure sensor. The blood pressure information is displayed on the display panel.