Touchscreen Indicator Rendering for Precise Selection
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Solution Overview
Problem
Portable electronic devices with touch screen displays face challenges in user-selectable feature selection due to small button sizes, leading to target inaccuracy and selection errors due to lack of touch feedback.
Innovation Solution
A method is implemented where a graphical user interface is rendered on the touch screen display, and an indicator is rendered for the nearest user-selectable feature upon detecting a touch event, positioned intermediate other features to avoid obstruction, allowing for precise selection without obscuring other options.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the size of user-selectable features (buttons) on the touch screen is decreased to fit more features, then the quantity of user-selectable features increases, but the ease of operation deteriorates due to target inaccuracy and selection errors
Solution Approach 1:
The system performs preliminary action by highlighting the selected button before the user completes the selection gesture. This allows the user to see exactly which button will be activated, enabling more precise targeting and reducing selection errors even when buttons are small.
Solution Approach 2:
The system provides visual feedback by highlighting the selected button and providing tactile feedback through the touch screen. This feedback mechanism helps users confirm their selection and adjust their targeting accuracy, improving ease of operation despite reduced button size.
2Volume of moving object
If the size of user-selectable features is decreased to maintain compact device size, then the portability is improved, but the reliability of selection deteriorates due to target inaccuracy
Solution Approach 1:
The system highlights the selected button before activation, providing a preliminary visual confirmation that helps users accurately identify and select the intended button, thereby improving selection reliability despite small button sizes.
Solution Approach 2:
The system provides visual and tactile feedback upon selection, confirming to the user that the correct button has been activated. This feedback mechanism increases selection reliability by allowing users to verify their input before the selection is finalized.
3Ease of operation
If touch feedback is added to improve selection accuracy, then the ease of operation is improved, but the device complexity increases
Solution Approach 1:
The touch screen serves multiple functions: it displays the user interface, detects touch input, and provides visual and tactile feedback. By making the touch screen multi-functional, the system avoids adding separate components for feedback, thereby improving selection accuracy without significantly increasing device complexity.
Data Source
AI summary
A method of controlling a portable electronic device having a touch screen display includes rendering a graphical user interface including a plurality of user-selectable features on the touch screen display and, in response to detecting a touch event on the touch screen display proximal one of the user-selectable features, rendering an indicator for one of the user-selectable features corresponding to a location of the touch event prior to selection of any of the user-selectable features. The indicator is rendered intermediate ones of the user-selectable features for identifying the one of the user-selectable features absent obstruction of other ones of the user-selectable features.