Touch Panel System False Touch Detection Using Determining Region
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Solution Overview
Problem
Conventional touch panel systems erroneously recognize touch-like phenomena caused by noise or other factors, leading to incorrect detection of touch positions.
Innovation Solution
A touch panel system with a touch position detecting section that includes a touch start determining section, which sets a determining region based on the earliest detected touch position candidate and determines if a touch has started from that position only if successive touches are detected within that region a predetermined number of times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the touch panel system detects touch positions at every predetermined time to recognize continuous touch operations, then the system can detect touch operations accurately, but the system erroneously recognizes touch-like phenomena caused by noise or other factors as actual touches
Solution Approach 1:
The system performs preliminary actions by detecting multiple touch positions in advance before finalizing a touch operation recognition. Specifically, it detects a plurality of touch positions at predetermined time intervals and uses these preliminary detections to determine whether a valid touch operation occurred, thereby filtering out false touches from noise while maintaining accurate touch detection
Solution Approach 2:
The system implements feedback by continuously monitoring touch positions over time and using this temporal feedback to distinguish between valid touches and false signals. The touch position detecting section repeatedly detects touch positions and compares them across time intervals, using this feedback loop to confirm whether a detected touch is a genuine user input or noise-induced false positive
2Ease of operation
If the system uses simple touch detection to enable easy operation, then the ease of operation is improved, but the reliability of touch detection deteriorates due to false recognition of noise as touches
Solution Approach 1:
The system maintains continuity of useful action by continuously detecting touch positions at predetermined time intervals and accumulating these detections. This continuous monitoring allows the system to distinguish between brief noise signals and sustained touch operations, maintaining both ease of operation and detection reliability through persistent observation rather than single-point detection
3Productivity
If the touch panel system operates at high speed to improve productivity, then the response speed is improved, but the measurement precision deteriorates because the system cannot reliably distinguish between rapid noise signals and actual touch operations
Solution Approach 1:
The system employs periodic action by detecting touch positions at regular predetermined time intervals rather than continuously or sporadically. This periodic detection pattern allows the system to maintain high response speed while improving measurement precision, as the rhythmic sampling provides consistent temporal reference points that help distinguish rapid but brief noise signals from deliberate touch operations
Data Source
AI summary
A touch panel system (1) includes a touch panel (3) and a touch position detecting section (5) for detecting a touch position on the touch panel (3). The touch position detecting section (5) includes a touch start determining section (56) for (i) setting a determining region based on a touch start position candidate which is a touch position that has been detected relatively earliest and (ii) determining that touches have been started from the touch start position candidate in a case where the touches whose starting point is at the touch start position candidate have been successively detected within the determining region a predetermined number of times or more.