Control Pad for Precise Touch Selection
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Solution Overview
Problem
Mobile devices face challenges in precise selection and manipulation of graphical elements due to the lack of precision in touch interfaces, as fingers obscure the view and require larger touch areas, making it difficult for tasks like editing vector graphics and animations.
Innovation Solution
The Control Pad technology provides a dedicated area for receiving gestures to control graphical objects, incorporating motion-absorbent snapping, gesture acceleration, and a linear-scrollable view tool for precise selection and manipulation of graphical elements, allowing pixel-precise scaling and positioning without obscuring the view.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If direct touch interaction with user interface elements is used, then ease of operation is improved, but measurement precision deteriorates because the user's finger obscures the element being interacted with
Solution Approach 1:
The patent introduces a cursor as an intermediary between the user's finger and the graphical elements. The cursor is displayed at the location corresponding to the user's finger position, allowing the user to select elements without their finger directly touching or obscuring them. This mediator enables precise selection while maintaining the simplicity of direct touch interaction.
2Area of stationary object
If user interface objects are designed in small sizes to provide more screen real estate, then area of stationary object is improved, but ease of operation deteriorates because larger touch areas are needed for accurate selection
Solution Approach 1:
The cursor acts as a mediator that extends the user's pointing capability beyond the physical limits of their finger. By displaying the cursor at the precise location corresponding to finger position, the system enables accurate selection of small interface elements without requiring the user's finger to be smaller than the target.
Solution Approach 2:
The patent replaces the mechanical constraint of finger size with a visual indicator system. Instead of relying on the physical dimensions of the user's finger to locate and select elements, the system uses a displayed cursor that can precisely indicate any location on the screen, effectively substituting the mechanical pointing mechanism with a visual feedback system.
3Measurement precision
If a mouse cursor is used in desktop environment, then measurement precision is improved, but device complexity increases due to the need for mouse and keyboard
Solution Approach 1:
The patent makes the touch screen serve multiple functions: it acts as both the display surface and the input device. The same touch-sensitive display that shows the cursor also detects finger position and gestures, eliminating the need for separate input devices like mice or keyboards while achieving precise control.
Solution Approach 2:
The system uses the touch screen itself as an intermediary between the user's finger and the graphical elements. By detecting finger position and displaying a corresponding cursor on the same surface, the system creates a mediation layer that enables precise selection without requiring additional hardware components.
Data Source
AI summary
A method, apparatus, system, and computer program product/article of manufacture provide the ability to enable and use of a Control Pad technology on a multi-touch device, which is designed for a touch-based user interface that affords precise selection and manipulation of graphical objects, for instance, the editing of vector graphics objects, points on a vector object outline, animation paths, and positions of graphical objects within a document or composition.