Pen Mouse Optical Detection for Non-Linear Motion Compensation
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Solution Overview
Problem
Conventional pen mice often experience unintentional cursor movement due to non-linear motions such as pen-tilted or pen-spinning, which their structural configuration cannot effectively address.
Innovation Solution
A pen mouse equipped with an optical detection module comprising a circuit board, first and second sensors, and laser emitters, which emit detection light through light-permeable portions to differentiate between linear and non-linear motions by varying light paths, allowing for accurate cursor control by determining pen-tilted or pen-spinning motions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional pen mouse structure is used, then the device is simple and easy to manufacture, but unintentional cursor movement occurs due to non-linear motions (pen-tilted or pen-spinning)
Solution Approach 1:
The optical detection module is divided into multiple sensing channels (first sensor and second sensor with different light path lengths) that independently detect motion parameters. By segmenting the detection function into multiple specialized sensors, the system can distinguish between intentional linear cursor control motions and unintentional non-linear motions (pen-tilting or pen-spinning), thereby improving cursor control accuracy without requiring a complete redesign of the overall device structure.
Solution Approach 2:
The patent introduces an intermediary processing mechanism that analyzes the differential signals from multiple sensors with different light path lengths. This intermediary detection layer processes the optical signals to identify non-linear motion patterns and generates compensation data, which then corrects the cursor movement. This intermediary processing step resolves the contradiction by adding intelligence to the detection system rather than fundamentally changing the mechanical structure.
2Measurement precision
If multiple sensors with different light path lengths are used, then non-linear motions can be detected and compensated, but the device complexity increases
Solution Approach 1:
Different sensors are assigned different light path lengths (first light path and second light path have different lengths) to create local variations in the optical detection system. This local quality differentiation allows each sensor to be optimized for specific aspects of motion detection, enabling the system to distinguish between linear and non-linear motions with high precision while keeping the overall module design systematic and manageable.
Solution Approach 2:
The patent changes the parameter of light path length across different sensors within the optical detection module. By varying this physical parameter (light path length) rather than changing the fundamental sensor type or structure, the system achieves enhanced measurement precision through parameter differentiation. This approach allows precise motion detection while maintaining relatively simple sensor components and avoiding excessive device complexity.
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 solution enhances operational accuracy by compensating cursor movements, effectively distinguishing between linear and non-linear pen motions, thereby improving cursor control precision.
Implementation Method 1
the first sensor receives the detection light that travels along a first light path by being reflected from the working surface to pass through the at least one light-permeable portion, and the second sensor receives the detection light that travels along a second light path by being reflected from the working surface
Implementation Method 2
the at least one laser emitter is configured to emit a detection light passing through the at least one light-permeable portion
Data Source
AI summary
A pen mouse is provided for controlling a movement of a cursor displayed on a monitor. The pen mouse includes a pen and an optical detection module assembled in the pen. The optical detection module includes a circuit board, two sensors, and a laser emitter, the latter two of which are assembled onto the circuit board. When the pen mouse is moved along a working surface to implement a mouse control motion, the two sensors receive a detection light emitted from the laser emitter and reflected by the working surface, so as to determine whether the mouse control motion is a pen-tilted motion or a pen-spinning motion, thereby compensating the movement of the cursor.