Touch Interface Finger Trajectory Prediction for Selection Accuracy
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Solution Overview
Problem
Users interacting with touch interfaces, especially in automotive vehicles or production machines, face difficulties in selecting menu elements while maintaining attention on other tasks, leading to imprecise gestures due to the need to focus on multiple tasks simultaneously.
Innovation Solution
A graphical interface that detects the approach and position of a user's finger, estimating the trajectory and point of impact to dynamically adjust the display of graphical elements and their associated touch selection zones, allowing for intuitive input without increasing screen size, by displacing and enlarging elements based on finger proximity and trajectory.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the screen size is increased to facilitate element selection, then the ease of operation is improved, but the device complexity and space requirements worsen
Solution Approach 1:
The interface dynamically adjusts the size and position of graphical elements based on the detected finger trajectory and impact point. Elements are enlarged and repositioned in real-time to align with the user's intended selection, making the interface adaptive rather than static. This resolves the contradiction by providing large, easy-to-select elements without requiring a physically larger screen.
Solution Approach 2:
The system changes the display parameters (size, position, scale) of graphical elements based on the detected finger trajectory. By dynamically modifying these parameters in response to user input, the interface achieves both ease of operation and compact screen size, as elements are only enlarged when needed during the selection process.
2Manufacturing precision
If the user focuses on selecting menu elements, then the manufacturing precision of input is improved, but the loss of time for monitoring primary tasks worsens
Solution Approach 1:
The system performs preliminary detection of the finger's approach and trajectory before actual contact with the screen. By predicting the intended target based on the trajectory, the interface prepares the appropriate graphical element for selection in advance, allowing the user to maintain focus on primary tasks while the system anticipates and prepares for the input action.
Solution Approach 2:
The interface provides visual feedback by displaying the detected trajectory and highlighting the predicted target element. This feedback mechanism allows the user to verify the system's interpretation of their intent without diverting full attention to the interface, resolving the contradiction between input precision and attention diversion.
3Ease of operation
If the touch selection zone is made larger to improve selection accuracy, then the ease of operation is improved, but the area occupied by each element worsens, requiring more screen space
Solution Approach 1:
The touch selection zone dynamically expands and repositions to encompass the predicted finger impact point and surrounding area. Instead of using fixed-size zones, the interface adapts the selection zone size and position in real-time, providing large effective selection areas without requiring proportionally larger element display areas on the screen.
Solution Approach 2:
The system resolves the area contradiction by operating in the temporal dimension - the enlarged selection zone and element display are temporary states that occur only during the selection process, not permanent states. This allows large effective selection areas without permanently occupying more screen space.
Data Source
AI summary
A touch interface includes a display screen and detects an approach and a position of a user's finger with respect to the screen. The interface displays at least one first graphical element associated with a first touch selection zone and lying in a first region and at least one second graphical element superimposed on a second touch selection zone, and lying in a second region distinct from the first region. The interface estimates a trajectory of a point of the finger and a point of impact of the trajectory on the screen. The interface displaces, when the point of impact is detected in one of the regions, the graphical element of the region and the associated touch selection zone in the direction of the point of impact, and then, when the point of impact exits the region, restore the display of the graphical element to an initial state.