Optical Finger Mouse Dual-Wavelength Physiological Detection
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Solution Overview
Problem
Conventional pulse oximeters cannot be applied to portable electronic devices due to signal noise caused by movement and interference from ambient light sources, which prevents accurate detection of physiological characteristics like blood oxygenation and heart rate.
Innovation Solution
A mouse control module and optical finger mouse that simultaneously detect finger displacement, contact status, and physiological characteristics by analyzing reflected light, using two light sources of different wavelengths, and employing independent component analysis or blind source separation to eliminate noise and ambient light interference, while also regulating system frequency and entering sleep mode when idle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional pulse oximeters are used to detect physiological characteristics, then blood oxygenation and heart rate can be monitored, but signal noise caused by movement and ambient light interference prevents accurate detection
Solution Approach 1:
The patent divides the detection process into multiple independent components: separate detection channels for different wavelengths, independent processing for movement compensation, and distinct measurement zones on the touch screen. This segmentation allows the system to isolate and process physiological signals separately from movement artifacts and ambient light interference, thereby improving measurement precision while maintaining the compact form factor of a mouse device.
Solution Approach 2:
The patent introduces an intermediary processing layer that uses independent component analysis and blind source separation algorithms to mediate between the raw detected signals and the final physiological characteristics. This intermediary processing step filters out noise from movement and ambient light, extracting only the relevant physiological information, thus resolving the contradiction between compact device design and accurate physiological measurement.
2Measurement precision
If the optical finger mouse detects physiological characteristics during user interaction, then accurate monitoring is possible, but device power consumption increases
Solution Approach 1:
The patent implements periodic action by activating the light sources and physiological detection functions only during specific interaction periods when the user's finger contacts the touch screen. The system alternates between active detection modes and low-power idle states, significantly reducing overall power consumption while maintaining accurate physiological monitoring during use. This periodic activation pattern resolves the contradiction between continuous accurate detection and power conservation.
Solution Approach 2:
The patent applies dynamics by making the detection system adaptive to user interaction patterns. The system dynamically adjusts its operational state based on whether the user is interacting with the mouse, automatically transitioning between high-precision detection mode during contact and power-saving mode during idle periods. This dynamic behavior allows the device to provide accurate physiological monitoring when needed while conserving battery power during non-use periods.
3Productivity
If the optical finger mouse continuously monitors physiological characteristics, then real-time detection is achieved, but power saving capability is reduced
Solution Approach 1:
The patent employs feedback mechanisms that monitor user interaction status and dynamically adjust the detection system's operational state. When the system detects user interaction through touch screen contact, it activates real-time physiological monitoring. Conversely, when no interaction is detected, the system transitions to a low-power state. This feedback-driven state management enables real-time detection capability during use while minimizing energy loss during idle periods.
Solution Approach 2:
The patent implements dynamic operational modes that switch between high-productivity real-time detection and energy-conserving idle states based on usage conditions. The system dynamically adapts its performance characteristics to match actual user needs, providing comprehensive real-time monitoring during interaction while sacrificing continuous monitoring during idle time to conserve energy. This dynamic approach resolves the contradiction between real-time detection capability and power saving.
4Loss of information
If the optical finger mouse processes and outputs encoded physiological information, then useful data is provided, but device complexity increases
Solution Approach 1:
The patent achieves multi-functionality by integrating physiological detection, movement tracking, and data processing capabilities into a single optical finger mouse device. The same light sources and sensors used for basic mouse functionality also serve physiological monitoring, eliminating the need for separate dedicated physiological measurement devices. This universal approach provides comprehensive information processing capability while avoiding the complexity of multiple separate systems.
Solution Approach 2:
The patent merges the physiological detection functions with the existing mouse control module architecture, combining light sources, sensors, and processing units into a unified system. By merging these functions rather than implementing separate systems, the patent reduces overall device complexity while maintaining robust physiological information processing and output capabilities.
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
Effectively outputs encoded, sequenced, and compressed finger and physiology information, eliminating signal noise and ambient light interference, allowing for accurate detection of blood oxygenation and heart rate even during user movement, and conserving power by entering sleep mode when not in use.
Implementation Method 1
The first light source emits light of a first wavelength to the finger. The second light source emits light of a second wavelength to the finger. The image sensor is configured to capture reflected light from the finger
Implementation Method 2
The processing unit is configured to calculate a displacement and a physiological characteristic according to the first image frames and the second image frames. The intensity variation of the penetrating light of the two wavelengths is detected, the blood oxygenation can be calculated
Data Source
AI summary
There is provided a mouse control module including two light sources, an image sensor, a processing unit and a communication unit. The two light sources emit light of different wavelengths to illuminate a finger surface. The image sensor receives reflected light from the finger surface to generate a plurality of image frames. The processing unit detects a displacement of the finger surface and a physiological characteristic of a user according to the plurality of image frames. The communication unit encodes and/or sequences the displacement and the physiological characteristic so as to generate finger and physiology information. There is further provided an optical finger mouse.