Touchscreen Zoom Control Centered on Touched Point
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Solution Overview
Problem
Mobile terminals struggle to display large images effectively on small screens, requiring frequent zooming in and out, which is inconvenient for users.
Innovation Solution
A mobile terminal with a touchscreen that allows users to control zooming by selecting a zoom function and touching a point on the screen, enabling zooming centered on the touched point, either proportionally to touch duration or count, and allowing the zoomed area to be shifted and resized interactively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a large image is displayed on a small display screen, then the image may be shown in high resolution, but the user cannot view the entire image and must frequently zoom in or out
Solution Approach 1:
The patent divides the display area into a first display area showing the entire image at a reduced scale, and a second display area showing a magnified portion of the image. This segmentation allows users to view both the overall layout and detailed portions simultaneously, eliminating the need to repeatedly zoom in and out while maintaining high effective resolution in the magnified area.
2Measurement precision
If frequent zooming operations are required to view images on a small screen, then high resolution can be maintained, but user convenience deteriorates due to repetitive operations
Solution Approach 1:
The patent automatically displays a magnified portion of the image in the second display area based on predetermined criteria (such as important regions or user-defined areas), eliminating the need for users to perform repeated zooming operations. The system performs the zooming action in advance and maintains it automatically, saving user time and effort while preserving high resolution.
3Loss of information
If the entire large image is displayed on a small screen, then the complete content is visible, but the image quality appears reduced
Solution Approach 1:
The patent transitions from a single-dimensional display (either full image or zoomed portion) to a two-dimensional display structure with multiple display areas. The first display area shows the complete image at a reduced scale, while the second display area simultaneously shows a magnified portion, allowing users to access both complete visibility and high quality without compromise.
Data Source
AI summary
A user interface system for controlling size of content displayed on a display screen of a limited display device is provided. The user interface system comprises a first user interface for selecting a first point on the display screen; and a second user interface for performing a resizing operation on content displayed on the display screen using the first point as a center of reference for purpose of performing the resizing operation, wherein the resizing operation is performed in response to user interaction with the first user interface and the second user interface.