Touch Input Interface With Relative Positioning
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Solution Overview
Problem
Conventional touch-based input solutions on devices are cumbersome and error-prone, particularly on small portable devices, as users often struggle with precise tapping on small screen areas, leading to frustration and calibration issues.
Innovation Solution
Implementing an input model that uses relative positioning instead of absolute, allowing controls and menus to be redrawn around the touch point, enabling users to interact by tapping and holding once, with subsequent inputs computed based on relative motion, reducing errors and improving usability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional point-and-click touch interface is used, then device can be operated with simple interface, but user accuracy in selecting controls deteriorates due to small target areas on portable devices
Solution Approach 1:
The interface is segmented into multiple interaction phases: initial tap phase for coarse positioning, then contextual menu phase for precise selection. This divides the selection task into manageable segments that accommodate both simple operation and accurate control selection.
Solution Approach 2:
The solution adds a temporal dimension to the interaction by implementing phased interaction sequences. Instead of relying solely on spatial precision in a single tap, the system uses time-based progression through interaction phases (initial tap → contextual menu display → selection) to achieve accurate control selection.
2Adaptability or versatility
If cascading menus or tab controls are used to group options, then interface organization is improved, but user operation complexity increases due to multiple taps required to access controls
Solution Approach 1:
The system performs preliminary actions by displaying contextual menus and controls automatically after the initial tap, preparing the interface state in advance. This preliminary display of relevant controls eliminates the need for users to navigate through multiple manual tapping steps to access grouped options.
Solution Approach 2:
The interface provides immediate feedback by displaying contextual menus and relevant controls directly in response to the user's initial tap location. This feedback mechanism guides the user through the interface organization without requiring complex multi-step navigation, reducing operation complexity while maintaining versatility.
3Measurement precision
If touch-screen calibration is implemented to improve tapping precision, then control selection accuracy is improved, but device complexity and user setup time increase
Solution Approach 1:
The system provides self-service by automatically compensating for imprecise tapping through contextual menu display and relative positioning algorithms. Instead of requiring users to perform calibration procedures, the interface adapts to the user's tap location and presents appropriate controls, making the system self-correcting without additional user effort or complexity.
Data Source
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AI summary
Visual feedback may be provided. First, a continuous contact with a first point on a surface may be detected. The surface may comprise, for example, a touch screen or a touch pad. The continuous contact may be caused by a selecting element comprising, for example, a stylus or a digit of a subject. Then a menu may be displayed in response to the detected continuous contact. The menu may comprise a plurality of menu selectable elements. Next, it may be detected that the continuous contact has moved from the first point on the surface to a second point on the surface. The second point may correspond to a one of the plurality of menu selectable elements. Then a control may be displayed corresponding the one of the plurality of menu selectable elements.