Touchscreen Input Offset Adjustment for Handheld Devices
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Solution Overview
Problem
Touchscreens on handheld electronic devices face challenges due to the small available space for user selection, making it difficult to accurately select small interactive user interface elements, especially when using fingers, as users tend to press below the target area to avoid occluding the item.
Innovation Solution
A method and device that utilize a touch offset to adjust the touch input location based on the device's orientation, compensating for the difference between the target area and the actual contact area, improving touch input accuracy by dynamically selecting the touch offset based on the device's orientation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If small interactive user interface elements are used to maximize information display, then the amount of information displayed is improved, but the ease of selecting these elements with a fingertip deteriorates
Solution Approach 1:
The patent introduces a cursor as an intermediary between the fingertip and the small user interface elements. The cursor acts as a mediator that can be precisely positioned and controlled, allowing users to select small elements without the physical limitations of fingertip size and accuracy. The cursor translates the user's touch input into precise selection actions on the touchscreen display.
2Measurement precision
If a stylus is used to improve touch input precision, then the selection accuracy is improved, but the ease of operation deteriorates due to the cumbersome nature of using a stylus with one hand
Solution Approach 1:
The patent replaces the mechanical stylus system with a software-based cursor control system. Instead of requiring a physical stylus tool, the system uses software to create and control a cursor that responds to fingertip touches. This substitution maintains the precision benefits of stylus-like control while eliminating the need for physical stylus manipulation, enabling easy one-handed operation.
3Area of stationary object
If the touchscreen area is reduced to fit handheld device form factor, then the device portability is improved, but the area available for user selection deteriorates
Solution Approach 1:
The cursor serves as an intermediary that decouples the physical touch area from the selection precision. Users can touch anywhere on the touchscreen with their finger, and the cursor system translates this into precise selection of small interface elements. This allows the touchscreen to maintain a compact size suitable for handheld devices while still providing adequate selection area through the cursor mediation mechanism.
Data Source
AI summary
A handheld electronic device having a touchscreen and a method of using a touchscreen of a handheld electronic device are provided. In accordance with one embodiment, there is provided a method of input using a touchscreen display of a handheld electronic device, comprising: displaying a graphical user interface (GUI) on the touchscreen display, the graphical user interface comprising a plurality of selectable user interface elements, each having an area of the touchscreen display associated herewith and each generating a respective input signal in response to selection thereof; detecting a touch input on the touchscreen display having a touch point; determining an orientation of the handheld electronic device; determining a touch offset in accordance with the orientation of the handheld electronic device; determining an adjusted touch point on the touch-sensitive input surface in accordance with the touch point and the touch offset; and generating an input signal associated with a respective user interface element displayed at the adjusted touch point when the adjusted touch point is associated with one of the plurality of selectable user interface elements in the graphical user interface.