Image Magnification Adjustment for Touch Screen Edge Detection
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Solution Overview
Problem
Users cannot immediately determine when they have reached the end of an image displayed on a screen during scrolling operations on a touch screen, as the screen contents do not change visibly when the end area is displayed.
Innovation Solution
Implementing a system where the image display device and method adjust the display magnification based on scrolling operations, such that when the edge of the image is reached, it is reduced and displayed, allowing users to recognize the end area through changes in image size, and automatic scrolling is triggered with varying speeds to indicate edge reach.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the image is displayed at full size on the screen during scrolling, then the display area is maximized, but the user cannot immediately determine when the end area is reached
Solution Approach 1:
The patent changes the display magnification parameter from 100% to 80% when the end area is detected, providing visual feedback to the user that the end has been reached while maintaining adequate display area
Solution Approach 2:
The system provides immediate visual feedback by changing the image size when the end area is reached, allowing the user to understand the current display state without ambiguity
2Ease of operation
If the image size is reduced when the end area is reached, then the user can identify the end area, but the display area decreases
Solution Approach 1:
The patent applies a moderate magnification change (to 80%) rather than a drastic reduction, balancing the need for visual feedback with maintaining adequate display area
Data Source
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AI summary
Provided is an image display device, including: display means for displaying on a screen a partial area image indicating a given area within an image to be displayed; display area moving means for moving the given area in response to a predetermined operation performed by a user; and determination means for determining whether or not the given area is located at an end portion of the image to be displayed, in which, when the given area is located at the end portion of the image to be displayed, the display means changes a display magnification of the partial area image displayed on the screen and display the partial area image on the screen in response to the predetermined operation performed by the user (S1023, S1026).