Dynamic Timeline Bar Distortion for Precise Touch Control
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Solution Overview
Problem
Existing timeline bars for controlling video and audio clips on touch screens suffer from low touch accuracy due to the large size of fingertips, leading to imprecise manipulation, especially on small devices, and complex nonlinear patterns that obscure the current position of the timeline slider.
Innovation Solution
A method and apparatus that dynamically distorts a section of the timeline bar around the user's touch position, allowing for fine manipulation by varying the distortion's range and strength based on touch duration and pressure, enabling precise control with a low-resolution fingertip.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a linear timeline bar is used, then the interface is simple and easy to understand, but the user cannot perform fine manipulation with a low-resolution fingertip
Solution Approach 1:
The timeline bar dynamically changes its shape from linear to nonlinear based on user interaction. When the user touches the timeline bar, the system transitions the display from a simple linear form to a nonlinear distorted form that enables fine manipulation, thus adapting the interface to the user's needs in real-time
Solution Approach 2:
The system changes the geometric parameters of the timeline bar by applying nonlinear distortion functions. The distortion strength and range are adjusted based on touch duration and pressure, transforming the timeline bar's shape to provide finer control while maintaining the ability to switch back to linear mode
2Measurement precision
If a nonlinear timeline bar is used, then the user can perform fine manipulation, but the current position of the timeline slider becomes difficult to determine
Solution Approach 1:
The system periodically switches between linear and nonlinear display modes. When the user needs fine manipulation, the timeline bar is distorted into a nonlinear pattern; when fine manipulation is not needed, it returns to a linear pattern, creating a rhythmic alternation that helps users maintain spatial orientation
Solution Approach 2:
The system prepares multiple timeline bar patterns (linear, various nonlinear distortions) in advance and switches between them based on user needs. The linear pattern serves as a reference framework that is prepared and available to help users understand the overall structure before entering fine manipulation mode
3Measurement precision
If the timeline bar is distorted with high strength, then fine manipulation is enabled, but the overall structure becomes complex and hard to recognize
Solution Approach 1:
The nonlinear distortion is applied locally to specific sections of the timeline bar rather than the entire bar. This allows fine manipulation in the distorted sections while maintaining the simple linear structure in undistorted sections, thus providing local complexity only where needed
Solution Approach 2:
The system applies partial distortion to only the necessary portions of the timeline bar. By distorting only specific segments rather than the entire timeline, the system achieves fine manipulation capability where needed while keeping the overall structure relatively simple and recognizable
Data Source
AI summary
A method and apparatus for controlling content based on a timeline in a timeline-based content control apparatus with a touch screen. The method includes generating and displaying a linear timeline bar on the touch screen regardless of the size of content; detecting contact on the timeline bar; nonlinearly distorting a predetermined section of the timeline bar being displayed around the touch-detected position on the timeline bar; and performing a fine search and shifting the distorted section depending on a direction of the user's touch.