Numerical Value Selection with Pinch-Adjusted Scale Units
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Solution Overview
Problem
Existing numerical value selecting interfaces on mobile devices require long-distance sliding for selecting values over large ranges, consuming time and effort, and reducing user experience.
Innovation Solution
A method and device that allows users to scale the numerical scale units by moving two fingers towards or away from each other, enabling quick and accurate selection of values over a great span.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a numerical value selecting interface with a great numerical value selecting range and a small numerical unit is used, then the precision of numerical value selection is improved, but the time and effort required for selection increases
Solution Approach 1:
The patent applies dynamics by making the numerical scale unit adjustable rather than fixed. The system dynamically changes the scale unit based on the selected range, allowing the interface to adapt its granularity. When users select a large range, the scale unit automatically increases to reduce sliding distance, while maintaining fine granularity when selecting small ranges, thus resolving the contradiction between precision and selection time.
Solution Approach 2:
The patent changes the parameter of numerical scale unit dynamically. Instead of using a fixed small numerical unit throughout, the system adjusts the scale unit parameter according to the selected value range. This parameter change allows the interface to maintain high precision for small values while enabling rapid selection for large values, effectively resolving the time-precision tradeoff.
2Measurement precision
If a numerical value selecting interface with a great numerical value selecting range and a small numerical unit is used, then the precision of numerical value selection is improved, but the effort required for selection increases
Solution Approach 1:
The system dynamically adjusts the scale unit based on the current selection context, making the interface adaptive rather than static. When users need to select values over large ranges, the scale unit automatically enlarges to reduce the physical sliding effort required, while preserving fine control for smaller ranges. This dynamic adaptation resolves the contradiction between precision and ease of operation.
Solution Approach 2:
The patent modifies the scale unit parameter according to the selection range, transforming a fixed-parameter interface into a variable-parameter interface. This parameter change strategy allows the system to optimize both precision and ease of operation by selecting appropriate scale units contextually, reducing user effort while maintaining accuracy.
3Measurement precision
If the numerical scale unit is kept small for accurate selection, then the precision is improved, but the displayed range that can be viewed at once is reduced
Solution Approach 1:
The patent implements a dynamic scale unit that automatically adjusts based on the displayed and selected range. When the displayed range is large, the scale unit increases to ensure all relevant values are visible, while maintaining fine precision when the range is small. This dynamic adjustment resolves the contradiction between display area and precision by adapting the scale unit to the current context.
Solution Approach 2:
The system changes the scale unit parameter dynamically according to the displayed range and selection context. Instead of using a fixed small scale unit that would require excessive scrolling, the system adjusts the scale unit size to match the displayed range, ensuring both comprehensive visibility and adequate precision are achieved simultaneously.
Data Source
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AI summary
An operational gesture input by a user is acquired (S100); it is identified (S200) whether the operational gesture is a first operational gesture or a second operational gesture preset; when the operational gesture is the first operational gesture, a scale unit of the numerical scale (310) is increased; and when the operational gesture is the second operational gesture, the scale unit of the numerical scale (310) is decreased. The first operational gesture is one of a movement of two fingers moving toward each other and a movement of the two fingers moving away from each other. The second operational gesture is the other of the movement of the two fingers moving toward each other and the movement of the two fingers moving away from each other.