Dual Airflow Sensor Navigation Device for Surface-Independent Tracking
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Solution Overview
Problem
Conventional optical mice fail to provide high-speed tracking on non-reflective or highly polished surfaces, limiting their performance and resolution, especially in environments like black plastic laminate, which affects gamers and presenters who need accurate cursor movement.
Innovation Solution
A navigation device utilizing airflow sensors and directors to generate two-dimensional navigation signals, independent of surface type, allowing for high-speed tracking and operation in free space by detecting orthogonal airflow components, which are processed to create precise movement signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a conventional optical mouse is optimized for high speed tracking, then the tracking speed is improved, but the resolution is reduced
Solution Approach 1:
The patent divides the tracking function into two independent sensor systems: an optical sensor for high-speed tracking and a laser sensor for high-resolution tracking. Each sensor has its own LED source and photodetector array, allowing them to operate independently and simultaneously provide their respective advantages without interference.
Solution Approach 2:
The patent combines two different sensing technologies (optical and laser) into a single mouse device. The housing contains both an optical sensor assembly and a laser sensor assembly, merging their functions to achieve both high speed and high resolution tracking capabilities in one device.
2Adaptability or versatility
If a conventional optical mouse uses optical sensing, then it works on reflective surfaces, but it fails on non-reflective or highly polished surfaces
Solution Approach 1:
The patent makes the mouse universally compatible with all surface types by incorporating two sensing systems with different operating principles. The optical sensor handles reflective surfaces while the laser sensor handles non-reflective and highly polished surfaces, making the device multi-functional across all surface conditions.
Solution Approach 2:
The patent changes the sensing parameter from purely optical reflection-based detection to include laser-based detection. The laser sensor uses a different wavelength and detection mechanism that is not dependent on surface reflectivity, allowing reliable tracking on surfaces that defeat conventional optical sensors.
3Reliability
If a conventional optical mouse requires a desktop surface, then it provides stable tracking, but it prevents presentation independent of a desktop surface
Solution Approach 1:
The patent introduces an airflow field as an intermediary medium for detection. Instead of requiring direct contact with a surface, the sensors detect airflows generated by mouse movement through air cavities. This allows the mouse to function in free space without requiring a physical desktop surface, enabling presentation mode operation.
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 high-speed and accurate cursor movement on various surfaces, including non-reflective ones, and allows operation in the absence of a navigation surface, enhancing usability for both gaming and presentation applications.
Implementation Method 1
a first sensor to detect a first airflow in response to movement of the navigation device in approximately a first direction
Implementation Method 2
a second sensor to detect a second airflow in response to movement of the navigation device in approximately a second direction
Implementation Method 3
Each airflow director includes a plurality of openings to direct the first and second airflows across the first and second sensors, respectively, and to maintain the first and second airflows substantially independent of one another
Data Source
AI summary
A navigation device with dual airflow sensors. The navigation device includes a first sensor to detect a first airflow in response to movement of the navigation device in approximately a first direction. The navigation device includes a second sensor to detect a second airflow in response to movement of the navigation device in approximately a second direction. The navigation device also includes first and second airflow directors which are aligned with the first and second sensors, respectively. Each airflow director includes multiple openings to direct the first and second airflows across the first and second sensors, and to maintain the first and second airflows substantially independent of one another. The navigation device also includes a microcontroller to generate a two dimensional navigation signal based on input signals from the first and second sensors.