Long Touch Gesture Magnification Control for Display Precision
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Solution Overview
Problem
Existing measurement instruments face difficulties in allowing precise control over zooming operations on display screens, particularly with multi-touch gestures, as fingers obscure the area of interest during zoom-in and zoom-out gestures, leading to spurious touches and the need for repeated gestures for large zoom factors.
Innovation Solution
A method utilizing a long touch gesture to control screen magnification and offset, allowing continuous zooming or panning based on user input, with adjustable time periods and modes for zooming in or out, and the ability to maintain or revert magnification levels upon gesture termination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If pinch-zoom gesture is used to control magnification, then the display resolution is concentrated on the area of interest, but the fingers obscure the area of interest making precise area definition difficult
Solution Approach 1:
The patent introduces a visual indicator (e.g., rectangle or highlight) as an intermediary element that represents the selected area on the display. This indicator is positioned at the same location as the user's touch gesture, allowing the user to see the selected area clearly through the indicator rather than relying on finger positioning alone. The indicator acts as a mediator between the user's intent and the actual selection, eliminating the obscuration problem.
2Ease of operation
If conventional pinch-zoom gesture is used, then zoom level can be controlled, but spurious touches occur when releasing the gesture
Solution Approach 1:
The patent requires the user to complete the pinch-zoom gesture and then wait for a predetermined time period before the zoom operation is executed. This preliminary waiting period allows the system to distinguish between intentional gestures and spurious touches. If no additional touches occur during this time period, the zoom operation is confirmed and executed, thereby eliminating false triggers.
3Manufacturing precision
If large zoom factor is required, then detailed view is achieved, but the pinch zoom must be repeated several times increasing operation time
Solution Approach 1:
The patent implements dynamic zooming where the magnification level changes continuously during the gesture based on the distance between fingers. Additionally, the system allows the user to hold the gesture for an extended period to achieve progressive zooming to higher magnification levels without releasing and re-initiating the gesture. This dynamic approach enables large zoom factors to be achieved in a single continuous gesture rather than multiple discrete steps.
Data Source
AI summary
A method for controlling a screen in a data processing system to generate displays that include portions of an underlying scene is disclosed. The method includes displaying on the screen a first displayed scene, detecting a long touch gesture, and displaying a second scene on the screen. The first displayed scene is characterized by a first magnification and a first offset relative to the underlying scene. The second displayed scene includes a different portion of the underlying scene and is characterized by a second magnification that is different from the first magnification. In one aspect of the invention, the second displayed scene is characterized by a second offset that is determined by the long touch gesture, and the second offset depends on the first displayed scene and the long touch gesture.