Pixel Array Biosignal Sensing for Accurate Non-Invasive Measurement
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Solution Overview
Problem
Non-invasive medical devices for measuring biological information, such as blood pressure, suffer from low accuracy and require improvements to enhance measurement precision while maintaining user comfort.
Innovation Solution
A biological information measuring apparatus incorporating a light-emitting pixel array and a light-receiving pixel array, with storage and memory capacitors in each light-emitting pixel to store and update pixel signals simultaneously, and a bio-signal processor to analyze data, allowing for precise biological information measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If non-invasive devices are used to measure biological information, then user comfort is improved, but measurement accuracy deteriorates
Solution Approach 1:
The device divides the measurement area into multiple pixel rows and columns, with each pixel independently controlling light emission and reception. This segmentation allows parallel measurement across multiple locations, improving accuracy while maintaining non-invasive operation. The pixel array structure enables simultaneous measurements at different positions without requiring invasive sensors.
Solution Approach 2:
The patent transitions from single-point measurement to two-dimensional array measurement. By arranging light-emitting and light-receiving pixels in grid patterns across multiple dimensions, the system captures spatial information that enhances measurement accuracy while keeping the device non-invasive and comfortable for users.
2Device complexity
If pixel signals are updated sequentially, then device complexity is reduced, but measurement precision deteriorates due to noise interference
Solution Approach 1:
The device performs preliminary actions by storing pixel signals in storage capacitors before processing. This allows the system to prepare and hold signal data without immediate processing interference, reducing noise contamination while maintaining manageable circuit complexity through pre-computed signal storage.
Solution Approach 2:
The patent implements feedback mechanisms where the bio-signal processor continuously monitors and adjusts pixel signal updates based on received light data. This feedback loop enables real-time optimization of measurement precision while managing device complexity through intelligent control algorithms that coordinate pixel array operations.
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
The apparatus achieves enhanced accuracy in measuring biological information by simultaneously updating pixel signals and reducing noise interference, thereby improving the reliability of measurements.
Implementation Method 1
a light-receiving pixel array including a plurality of light-receiving pixel rows each including a plurality of light-receiving pixels and configured to sample light that is emitted from the light-emitting pixel array and reflected by an object
Data Source
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AI summary
A biological information measuring apparatus for measuring biological information using an image sensor is provided. The biological information measuring apparatus may include a light-emitting pixel array including rows of light-emitting pixels; a light-receiving pixel array including rows of light-receiving pixels. The light-receiving pixel array may be configured to sample light that is emitted from the light-emitting pixel array and reflected by an object. The apparatus may include a bio-signal processor configured to measure biological information using data sampled by the light-receiving pixel array. Each of the light-emitting pixels may include a storage capacitor configured to store an nth light-emitting pixel signal and a memory capacitor configured to store an (n+1)th light-emitting pixel signal.