Contact Detection Device Trajectory Analysis
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Solution Overview
Problem
Existing contact detection systems in liquid crystal pen tablets struggle to accurately distinguish between correct and incorrect contacts, leading to unintended information display or failure to display intended information on the screen.
Innovation Solution
A contact detection device with a two-dimensional configuration of detecting elements, a generating unit, and a determining unit that analyzes feature information from detected trajectories to differentiate between correct and incorrect contacts using decision trees and weight-based determination methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If contact detection is performed using a simple presence/absence method, then the device complexity is low, but the measurement precision of contact distinction is insufficient
Solution Approach 1:
The contact detection is segmented into multiple analysis dimensions: trajectory length analysis, contact area analysis, and variance analysis. Each dimension extracts specific features from the detecting elements' data, and the combination of these segmented analyses enables accurate distinction between correct and incorrect contacts without requiring a single complex detection system
Solution Approach 2:
The invention transitions from two-dimensional contact point detection to three-dimensional trajectory analysis by adding the time dimension. This allows the system to analyze not only the position but also the temporal characteristics of contact, including trajectory length, contact duration, and variance over time, thereby improving contact distinction accuracy
2Measurement precision
If feature information analysis is performed to distinguish correct and incorrect contacts, then the contact distinction accuracy is improved, but the information processing time increases
Solution Approach 1:
The system performs preliminary analysis by continuously monitoring and storing trajectory data from the detecting elements during the drawing process. This preliminary action accumulates the necessary feature information (trajectory length, contact area, variance) in advance, allowing for rapid comparison and distinction when contact validation is needed, thereby reducing processing time
Data Source
AI summary
A contact detecting device includes a plurality of detecting elements, a generating unit, and a determining unit. The plurality of detecting elements are related to one another in a two-dimensional configuration on a predetermined contacted surface, and respectively detect a contact of an object with the contacted surface. The generating unit generates, on the basis of the result of detection by the plurality of detecting elements, feature information representing a feature of a trajectory drawn on the basis of a contact of an object with the contacted surface. The determining unit determines whether or not the feature information generated by the generating unit corresponds to previously registered specific contact feature information representing a feature of a trajectory drawn on the basis of a specific contact of an object with the contacted surface.