Touch Interface Visual Feedback for Mis-Targeting
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Solution Overview
Problem
Touch screens in challenging environments, such as those with bright ambient light, glare, or vibration, face difficulties in accurate selection due to the inability to provide clear feedback on touch location and activation, leading to potential mis-targeting of virtual buttons.
Innovation Solution
The implementation of a touch interface that provides active visual feedback through visual cues, such as a 'water drop' effect and color changes, to indicate when and where the display is touched, allowing operators to correct their finger position before activating a button, with operations executed upon release rather than touch.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If visual feedback is provided upon touch contact, then user awareness of touch location is improved, but unintended button activation may occur before user can correct finger position
Solution Approach 1:
The system performs preliminary visual feedback by displaying a water drop indicator at the touch location immediately upon contact, allowing the user to see where their finger is pointing before the button is activated. The actual button activation is delayed until after the user releases their finger, giving them time to correct their position if needed.
Solution Approach 2:
The system implements feedback by providing real-time visual confirmation of the touch location through the water drop indicator. This feedback loop allows the user to monitor their finger position and make corrections before the action is executed, improving precision in challenging environments.
2Speed
If operation is executed upon touch, then response time is improved, but user accuracy deteriorates due to inability to correct finger position
Solution Approach 1:
The system displays the water drop indicator as a preliminary action that provides visual confirmation of touch location before the button activation occurs. This allows users to see their touch position and correct it if necessary, improving accuracy without significantly delaying the overall response time.
Solution Approach 2:
The system inverts the conventional touch interface by executing the button activation upon finger release rather than upon touch contact. This reversal gives users the opportunity to correct their finger position during the touch duration, improving precision while maintaining acceptable response times.
3Device complexity
If no visual feedback is provided, then device complexity is reduced, but user accuracy deteriorates in challenging environments
Solution Approach 1:
The system uses color changes and visual transformations by displaying a water drop indicator that appears at the touch location. This visual feedback mechanism provides clear indication of where the user is touching the screen, improving accuracy in environments with bright light or vibration without adding significant complexity to the device.
Data Source
AI summary
An active feedback interface for a touch screen display that includes display of visual cues to indicate when and where the display was touched by a user. The visual cues may change over a period of time in accordance with a particular active or inactive area of the touch screen contacted by a user finger.