Trackpad Input Device Vibration Filtering and Cursor Control
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Solution Overview
Problem
Trackpad input devices face challenges in accurately controlling cursors on displays due to mechanical vibrations and motion, leading to inaccurate input signals and cursor movements.
Innovation Solution
A method and system that identify motion information of the trackpad input device and computing device, adjust conversion factors for input signals, and filter out mechanical vibrations to smooth and correct cursor movements, allowing for precise control of cursor positions and gestures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the trackpad input device is used for cursor control, then the ease of operation is improved, but the measurement precision deteriorates due to mechanical vibrations and motion
Solution Approach 1:
The patent introduces an intermediary processing layer between the trackpad sensor and the cursor control system. This intermediary component filters out mechanical vibrations and motion artifacts from the input signals, allowing the trackpad to maintain its ease of operation while achieving improved measurement precision by separating useful input signals from harmful vibration noise.
Solution Approach 2:
The patent replaces the direct mechanical coupling between the trackpad sensor and cursor control with a signal processing-based system. Instead of relying solely on mechanical precision, the system uses computational methods to interpret sensor data, filter vibrations, and determine accurate cursor positions, thereby substituting mechanical precision with intelligent signal processing.
2Measurement precision
If the conversion factor is adjusted based on motion information, then the measurement precision is improved, but the device complexity increases
Solution Approach 1:
The patent implements dynamic adjustment of the conversion factor based on real-time motion information detected by the trackpad. The system continuously adapts the conversion factor according to the current motion state, making the measurement precision dynamic rather than static. This dynamic approach improves precision without requiring a completely complex redesign of the entire system.
Solution Approach 2:
The patent changes the parameter of the conversion factor dynamically based on motion conditions. By adjusting this key parameter rather than redesigning the entire conversion system, the patent achieves improved measurement precision with minimal increase in device complexity. The parameter change approach allows fine-tuning of precision without proportionally increasing system 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
Enhances the accuracy and reliability of cursor control on displays by filtering out mechanical noise and adjusting sensitivity and gain factors based on device motion, improving user interaction and reducing errors from vibrations.
Implementation Method 1
Trackpad input devices make use of capacitive sensing, conductive sensing, or other technologies to track the position of an object
Implementation Method 2
A trackpad input device may include a motion identifier, such as a vibration sensor, that is configured to identify information about a motion of the trackpad input device
Data Source
AI summary
Systems and methods for controlling a cursor on a display using a trackpad input device are disclosed. The systems and methods may be directed to controlling the cursor on a display separate from the trackpad input device, based on information identified about a motion of a trackpad input device or a computing device. A conversion factor may be determined to relate input to the trackpad input device with control of the cursor on the display in response to the input. The conversion factor can be adjusted when the motion information indicates that the trackpad input device or computing device is in motion. An input signal from an input to the trackpad input device may be smoothed by filtering out a mechanical vibration signal within the input signal. The input signal may also be smoothed by subtracting the absolute motion of the trackpad input device from the input signal.