Contactless Gesture Interface with Mode Transition Feedback
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Solution Overview
Problem
Contactless user-interfaces often experience false positives, false negatives, and input errors due to misinterpretation of user movements, leading to user uncertainty and inefficient dual-mode screen configurations that require significant screen real-estate and divide user attention.
Innovation Solution
A gesture-based contactless user-interface system with a detector sub-system and user-feedback sub-system that operates in alert and control modes, providing acknowledgement and control feedback through visual and auditory cues, allowing users to interact with the system without physical contact, and dynamically adjusting feedback to mirror user movements for enhanced ergonomics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a contactless user-interface detects user movements to control system functionality, then the user can operate the system without physical contact (improving hygiene and durability), but false positives, false negatives, and input errors occur due to misinterpretation of movements (worsening reliability)
Solution Approach 1:
The system requires the user to perform an initialization gesture before control gestures become active. This preliminary action establishes a known state and confirms the system is ready to receive commands, reducing false positives by ensuring the detection system is properly calibrated and the user intends to interact with the system.
Solution Approach 2:
The system provides visual feedback through a display monitor showing detected gestures and system status. This feedback loop allows users to verify that their movements are being correctly interpreted, and the system can adjust its detection parameters based on confirmed successful interactions, thereby improving recognition accuracy over time.
2Loss of information
If the system provides visual feedback on a display monitor showing both system operation and detected user-input simultaneously, then the user can see what the system is sensing (improving transparency), but screen real-estate requirements increase and user attention is divided (worsening ease of operation)
Solution Approach 1:
The display monitor is divided into separate regions: one area shows system operation status while another area displays detected user-input gestures. This segmentation allows both types of information to be presented simultaneously without overwhelming the user, as each region can be optimized for its specific purpose and users can focus on one region at a time.
Solution Approach 2:
Instead of competing for horizontal screen space, the feedback information is organized vertically or through layered display techniques. The system can show different types of feedback at different times or positions, utilizing the temporal and spatial dimensions of the display to present comprehensive information without requiring excessive screen real-estate.
3Speed
If the contactless user-interface remains in control mode continuously, then the system responds immediately to gestures (improving responsiveness), but unintended gestures are more likely to be interpreted as commands (worsening reliability)
Solution Approach 1:
The system transitions to control mode only after detecting a specific initialization gesture, which serves as a deliberate intent signal. This preliminary action ensures that the system is in control mode only when the user clearly intends to interact, reducing the likelihood of unintended gestures being misinterpreted while maintaining quick response times once activated.
Solution Approach 2:
The system periodically checks for initialization gestures and transitions between alert mode and control mode based on detected user presence and intent. This periodic evaluation ensures the system remains responsive while maintaining reliability by re-confirming user intent at regular intervals rather than assuming continuous intent.
Data Source
AI summary
A system has a contactless user-interface through which a user controls a functionality of the system. The contactless user-interface has a detector sub-system and a user-feedback sub-system. The contactless user-interface has an alert mode and a control mode. In the alert mode, the user-feedback sub-system has a display monitor to provide a visible acknowledgement to the user, in response to the detector sub-system having detected the presence of the user within a an alert range. The contactless user-interface transitions from the alert mode to the control mode in response to the detector sub-system detecting an initialization gesture of the user. In the control mode, the contactless user-interface controls the functionality in response to the detector subsystem detecting a control gesture of the user. The visible acknowledgement is made to mirror the movements of the user.