Proximity Sensor Touchscreen Magnification Control
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Solution Overview
Problem
Conventional touchscreen technologies struggle with accurately controlling the magnification of images on display screens, particularly due to difficulties in detecting pointing objects and preventing accidental activation, and lack dynamic control over magnification factors and field of view sizes, making it hard for users to precisely select small icons and graphics on increasingly smaller interfaces.
Innovation Solution
A user interface method that detects input events, such as the distance and speed of a pointing object from the touchscreen, to dynamically adjust the magnification factor, field of view size, and size of the magnified area, allowing for precise control over the magnification event based on these parameters, thereby enhancing user interaction and selection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the area of touch of the pointing object is reduced relative to the display area, then the display resolution and detail are improved, but it becomes increasingly difficult to accurately move and select desired cursors or icons
Solution Approach 1:
The system dynamically adjusts the magnification factor based on the distance between the pointing object and the touchscreen surface. As the pointing object approaches the touchscreen, the magnification factor increases, allowing users to easily select small icons and cursors without sacrificing overall display resolution. This dynamic adjustment resolves the contradiction by adapting the interface to user needs in real-time.
Solution Approach 2:
The system introduces a new dimension of interaction by utilizing the Z-axis (distance from touchscreen surface) to control magnification. This additional degree of freedom allows users to access magnified views of icons and cursors without reducing the overall display area, thereby maintaining both high resolution and ease of selection.
2Ease of operation
If the pointing object is positioned on or in proximity with the touchscreen to select icons, then selection capability is enabled, but the field of view of that area is significantly obscured
Solution Approach 1:
The display is segmented into a magnified region and a non-magnified region. When the pointing object is detected in proximity to the touchscreen, a local magnified view is created at the detected location, allowing users to see both the magnified icon/cursor area and the surrounding context simultaneously. This segmentation resolves the contradiction by providing selection capability without completely obscuring the field of view.
Solution Approach 2:
Instead of magnifying the entire display, the system applies magnification locally only to the area where the pointing object is detected. This local magnification maintains the original field of view for the rest of the display while providing enhanced visibility and selection capability for the specific area of interest.
3Ease of operation
If proximity-based detection is used to enable magnification, then user interaction is simplified, but accidental or unwanted activation and magnification becomes difficult to prevent
Solution Approach 1:
The system establishes a threshold distance from the touchscreen surface that must be exceeded to trigger magnification. By requiring the pointing object to be at a specific distance threshold, the system prevents accidental activations while maintaining ease of use. Users can deliberately activate magnification by bringing the pointing object close to the screen, but casual contact or distant proximity won't trigger unintended magnification.
Solution Approach 2:
The system provides visual feedback by displaying a magnified preview when the pointing object approaches the threshold distance. This feedback mechanism allows users to confirm whether magnification should be activated, preventing unwanted activation while maintaining simplified interaction. The feedback loop enables users to control magnification reliably based on visual confirmation.
4Quantity of substance
If the size of graphics and icons on the display screen is reduced to fit more content, then information density is improved, but difficulty to view and select such graphics and icons increases
Solution Approach 1:
The system dynamically adjusts icon and cursor size based on the magnification factor determined by the pointing object's distance from the touchscreen. When magnification is activated, small icons and graphics are enlarged, making them easy to view and select while maintaining high information density on the overall display. This dynamic resizing resolves the contradiction between information density and ease of selection.
Data Source
AI summary
A user interface including a display screen and an input device. The input device is for example a touchscreen, a touch pad, and one or more proximity sensors. The input device detects an input event, more specifically a pointing object placed in proximity therewith. Parameters of the input event include distance of the pointing object from the input device, speed of displacement of the pointing object towards the input device, direction of displacement of the pointing object towards the input device, and direction of displacement of the pointing object relative a plane of the input device. The display screen effects output events or magnification events. A field of view on the display screen (i.e. an area on the display screen) is magnified. At least one of scale of magnification, size of field of view to be magnified and size of resultant magnified field of view is dependent on at least one of the parameters of the input event. A user interface method for controlling magnification events effected by the display screen in response to signals generated by the input device is also provided by the present disclosure.