Touch Area Threshold Control for Unintended Touch Detection
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Solution Overview
Problem
Existing touch panel systems often detect unintentional touch operations, leading to erroneous actions and poor operationality, as they either invalidate intentional touches or perform unintended actions due to inadequate threshold settings for touch area validation.
Innovation Solution
An electronic apparatus with a touch detector and controller that differentiates between intended and unintended touch operations by setting specific threshold values for touch areas on various screens, executing functions only for touch operations within validated areas and invalidating those outside the set thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed touch area threshold is used to invalidate unintentional touches, then erroneous operations are reduced, but intentional touches with large area are also invalidated leading to poor operationality
Solution Approach 1:
The patent applies dynamics by making the touch area threshold variable rather than fixed. The threshold dynamically changes based on the displayed screen type: a first threshold for screens where touch operations execute functions, and a second (larger) threshold for screens where touch operations do not execute functions. This dynamic adjustment allows the system to adapt to different operational contexts, preventing unintentional touches on critical screens while accepting legitimate touches on non-critical screens.
Solution Approach 2:
The patent changes the parameter of touch area threshold based on screen context. By switching between two threshold values (first threshold and second threshold) depending on the displayed screen, the system optimizes both reliability and ease of operation for different usage scenarios without requiring complex real-time analysis of touch intent.
2Object-affected harmful factors
If a small touch area threshold is set to prevent unintentional touches, then false operations are reduced, but legitimate large-area touches are blocked
Solution Approach 1:
The patent applies local quality by setting different touch area thresholds for different screen contexts. Instead of using a uniform threshold across all screens, the system assigns a stricter first threshold for screens where touch operations trigger functions, and a more lenient second threshold for screens where they don't. This localized approach ensures high precision where needed while maintaining versatility elsewhere.
3Ease of operation
If a large touch area threshold is set to accept all intentional touches, then operationality is improved, but unintentional touches are also accepted causing erroneous actions
Solution Approach 1:
The patent segments the touch threshold validation process into two distinct cases based on screen type. Case 1 uses a first threshold for screens where touch operations execute functions, and Case 2 uses a second threshold for screens where they don't. This segmentation allows the system to maintain high operationality for non-critical screens while ensuring reliability for critical screens, avoiding the need to choose a single threshold that compromises either aspect.
Data Source
AI summary
Provided are a touch detector capable of detecting touch, a controller effecting control so that a touch operation is invalidated in a case where the touch area detected by the touch detector is equal to or larger than a threshold value, and so that a touch operation is validated in a case where the touch area detected by the touch detector is smaller than a threshold value, and a setting unit setting the threshold value used by the controller so that the threshold value used in a case of displaying a first screen is smaller than the threshold value used by the controller in a case of displaying a second screen in accordance with an operation relating to a displayed item displayed in the first screen having been performed.