Display Device Pulse Wave Correction for Integrated Biometric Measurement
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Solution Overview
Problem
Conventional display devices require separate devices for biometric information measurement, such as heart rate and blood pressure, leading to inconvenience due to the need for additional equipment.
Innovation Solution
Integration of display pixels and light sensing pixels in a display device, with a main driving circuit that processes pulse wave signals to generate biometric information, including reference correction values, enabling biometric signal detection and display on the same device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a separate portable blood pressure measuring device is used, then biometric information measurement accuracy is improved, but device complexity and user convenience deteriorate due to requiring additional equipment
Solution Approach 1:
The patent combines the display device with biometric information measurement functionality by integrating display pixels that can emit light and light sensing pixels that can detect reflected light. The main driving circuit processes pulse wave signals obtained through these pixels to generate biometric information, merging what were previously separate devices into one unified system.
Solution Approach 2:
The display device is transformed into a multi-functional device that not only displays images but also measures biometric information. The display pixels serve dual purposes: displaying visual information and emitting light for pulse wave detection. The light sensing pixels similarly serve dual purposes: detecting display light and detecting reflected light for biometric measurement.
2Adaptability or versatility
If multiple separate devices are used for different biometric measurements, then measurement coverage is improved, but ease of operation deteriorates due to managing multiple devices
Solution Approach 1:
The display device is transformed into a multi-functional device that not only displays images but also measures biometric information. The display pixels serve dual purposes: displaying visual information and emitting light for pulse wave detection. The light sensing pixels similarly serve dual purposes: detecting display light and detecting reflected light for biometric measurement.
Solution Approach 2:
The patent combines the display device with biometric information measurement functionality by integrating display pixels that can emit light and light sensing pixels that can detect reflected light. The main driving circuit processes pulse wave signals obtained through these pixels to generate biometric information, merging what were previously separate devices into one unified system.
3Device complexity
If display pixels are used for both display and light emission, then device integration is improved, but display quality may deteriorate
Solution Approach 1:
Each pixel unit is divided into distinct functional components: display pixels for visual output and light sensing pixels for detection. This segmentation allows each component to be optimized for its specific function while working together within the same pixel structure, maintaining both display quality and sensing accuracy.
Solution Approach 2:
Different regions within the pixel array are assigned different functional qualities. Display pixels are optimized for light emission and visual display, while light sensing pixels are optimized for detecting reflected light. This local differentiation of quality ensures that each component performs its specific function with high precision.
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 integrated biometric information measurement, such as heart rate and blood pressure, directly on the display device without the need for additional hardware.
Implementation Method 1
a display scan driver configured to drive the display pixels to emit light
Implementation Method 2
a light sensing scan driver configured to drive the light sensing pixels to sense light
Implementation Method 3
obtaining, using a biometric information detection device, a first reference pulse wave signal, a second reference pulse wave signal, a first pulse wave signal, and a second pulse wave signal
Data Source
AI summary
A display device includes a display panel including display pixels and light sensing pixels arranged in a display area of the display panel, a display scan driver configured to drive the display pixels to emit light, a light sensing scan driver configured to drive the light sensing pixels to sense light, and a main driving circuit. The main driving circuit is configured to obtain, using a biometric information detection device, a first reference pulse wave signal, a second reference pulse wave signal, a first pulse wave signal, and a second pulse wave signal, generate a first reference correction value and a second reference correction value based on the first reference pulse wave signal and the second reference pulse wave signal, respectively, and generate biometric information based on the first pulse wave signal, the second pulse wave signal, the first reference correction value, and the second reference correction value.