Display Panel Biometric Sensing Using Infrared Vessel Imaging
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Solution Overview
Problem
Portable display devices face challenges in securing conditions for measuring biometric information like signal-to-noise ratio due to limitations in light emission, luminance, and light source lifespan, making it difficult to integrate biometric measurement capabilities effectively.
Innovation Solution
A display device with integrated display and light sensing pixels, including infrared light emitting pixels, that uses a main driving circuit to separate and generate blood vessel image data and detect pulse wave signals through light sensing, enabling biometric information measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a portable display device integrates biometric measurement capabilities, then measurement functionality is improved, but signal-to-noise ratio and measurement reliability deteriorate due to limited light emission and luminance
Solution Approach 1:
The patent merges the display function and light sensing function into a single integrated pixel structure. Each pixel contains both a light emitting unit and a light sensing unit, allowing the display device to simultaneously perform visual display and biometric measurement (such as blood pressure measurement) without requiring separate external devices. This integration enables the display panel to serve dual purposes: displaying information and detecting biological signals from the user's body.
Solution Approach 2:
The display pixels are designed with multi-functionality, serving both as display elements and as sensing elements for biometric measurements. The same pixel structure that displays visual information also detects light reflected from the user's body to measure blood pressure and other physiological parameters, thereby achieving universal functionality within the display device.
2Adaptability or versatility
If a portable display device integrates biometric measurement capabilities, then measurement functionality is improved, but device complexity increases due to requiring independent light source and sensor
Solution Approach 1:
The patent merges the display function and light sensing function into a single integrated pixel structure. Each pixel contains both a light emitting unit and a light sensing unit, allowing the display device to simultaneously perform visual display and biometric measurement (such as blood pressure measurement) without requiring separate external devices. This integration enables the display panel to serve dual purposes: displaying information and detecting biological signals from the user's body.
Solution Approach 2:
The display pixels are designed with multi-functionality, serving both as display elements and as sensing elements for biometric measurements. The same pixel structure that displays visual information also detects light reflected from the user's body to measure blood pressure and other physiological parameters, thereby achieving universal functionality within the display device.
3Adaptability or versatility
If display device uses conventional light sources for biometric measurement, then measurement capability is achieved, but light source lifespan and reliability deteriorate
Solution Approach 1:
The display pixels serve themselves by utilizing their own light emitting capability for biometric measurements. The same light source that displays visual information also serves as the illumination source for detecting blood pressure and other physiological signals. This self-service approach eliminates the need for separate light sources that would have limited lifespans, as the display pixels continuously operate without requiring additional dedicated lighting components.
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
Accurately measures biometric information such as blood pressure by analyzing blood vessel placement patterns and detecting bio-signals, enhancing user recognition and measurement accuracy.
Implementation Method 1
light sensing pixels arranged in the display area together with the display pixels... receive the light sensing signals through the light sensing pixels
Implementation Method 2
infrared light emitting pixels arranged in the display area together with the display pixels
Data Source
AI summary
A display device includes a display panel, display pixels arranged in a display area of the display panel, light sensing pixels in the display area together with the display pixels, infrared light emitting pixels in the display area together with the display pixels, a display scan driver to drive the display pixels and the light sensing pixels to emit light, a light sensing scan driver to drive the light sensing pixels to detect light, and a main driving circuit to detect pulse wave signals of a user using light sensing signals received through the light sensing pixels and to measure biometric information, wherein the main driving circuit is to separate and generate blood vessel image data from image data and to receive the light sensing signals of a light receiving area by distinguishing the light receiving area according to the blood vessel image data in the display area.