Contactless Operation Detection for Touchscreen Input
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Solution Overview
Problem
Existing contactless operation methods for selecting objects on a screen are prone to erroneous operations due to ambiguity in distinguishing between hovering and contact actions, leading to unintended selections when a user's finger is close to or away from the screen.
Innovation Solution
An information processing system that differentiates between contact and contactless operations by detecting the finger's position relative to the screen, accepting contact operations when the finger is in contact and contactless operations when the finger is at a predetermined distance away, with specific criteria for object selection involving movement thresholds and display changes to prevent erroneous selections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If contactless operation is accepted by keeping the target hovering over the object for a predetermined amount of time, then ease of operation is improved, but reliability deteriorates due to erroneous operations
Solution Approach 1:
The system dynamically adjusts the operation acceptance criteria based on the motion state of the target. When the target moves away from the screen, contactless operation is accepted. When the target comes into contact with or near the screen, contact operation is required. This dynamic transition prevents erroneous operations while maintaining ease of use.
Solution Approach 2:
The system changes the operational parameters based on the target's position and motion state. By detecting whether the target is moving away from or toward the screen, the system switches between accepting contactless operations (when moving away) and contact operations (when near or contacting), thereby resolving the contradiction between ease of operation and reliability.
2Ease of operation
If the target is detected at a position away from the screen for contactless operation, then ease of operation is improved, but measurement precision deteriorates in distinguishing hovering from contact actions
Solution Approach 1:
The system adds the motion direction dimension to the detection criteria. Instead of only detecting position distance, it also detects whether the target is moving toward or away from the screen. This additional dimensional information enables precise distinction between hovering and contact actions, resolving the measurement precision issue.
Solution Approach 2:
The system uses feedback from motion detection to refine the operation type classification. By continuously monitoring whether the target's position is changing (moving away or toward the screen), the system receives feedback that enhances the precision of distinguishing between different operation types, even when the target is detected at positions away from the screen.
Data Source
AI summary
An information processing system includes a processor configured to accept a contact operation with a target for an object displayed on a screen in response to the target coming into contact with the screen; and accept a contactless operation with the target for the object in response to detection of the target at a position away from the screen, the contactless operation including movement of a detected position of the target in the screen.