Long Touch Gesture Recognition With Tactile Feedback
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Solution Overview
Problem
Portable multifunction devices with touch-sensitive screens pose difficulties for elderly or sick individuals with sensory loss or impaired fine motor skills, as they struggle to accurately interact with the screens due to the requirement for precise and brief touches.
Innovation Solution
Implementing a method that automatically activates an application launcher upon device loading, which listens for long clicks (250 ms or more) and responds with vibration and action based on continuous touch location, thereby enhancing usability for individuals with sensory impairments by differentiating between long and short touches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If touch-sensitive screens are used for efficient interaction, then productivity and ease of operation are improved, but accessibility for users with sensory loss or impaired fine motor skills deteriorates
Solution Approach 1:
The patent changes the temporal parameter of touch interaction by requiring a sustained touch duration (e.g., 500 milliseconds or more) to trigger an action. This transforms the brief, precise touch requirement into a prolonged touch requirement, making the interface accessible to users with sensory loss or motor impairments who can maintain pressure on the screen for longer periods.
Solution Approach 2:
The system dynamically evaluates the duration of each touch event to determine whether to execute an action. By introducing time-based dynamic assessment, the interface adapts to different user capabilities, allowing users with impaired fine motor skills to successfully interact by holding their touch longer rather than requiring precise, brief touches.
2Speed
If brief and precise touches are required for screen interaction, then interaction speed is improved, but usability for users with sensory impairments deteriorates
Solution Approach 1:
The patent modifies the temporal parameter of the interaction from brief touches to sustained touches of at least 500 milliseconds. This parameter change prioritizes user capability over interaction speed, enabling users with sensory impairments to successfully interact with the device even if it requires slightly longer touch duration.
3Speed
If traditional click events are triggered by brief touches, then responsiveness is improved, but accessibility for elderly or sick users deteriorates
Solution Approach 1:
The system performs a preliminary assessment of touch duration before triggering the click event. By requiring the touch to be sustained for at least 500 milliseconds, the system ensures that the user intentionally initiated the action rather than accidentally touching the screen, thereby improving accessibility for users with sensory loss or motor impairments.
Solution Approach 2:
The system provides tactile feedback through vibration when a sustained touch of at least 500 milliseconds is detected. This feedback mechanism confirms to users with sensory impairments that their touch has been recognized and will trigger the intended action, improving both accessibility and user confidence in the interaction.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution allows elderly and impaired users to interact with portable multifunction devices more effectively by ensuring only long touches trigger actions, reducing frustration and improving accessibility through clear tactile feedback.
Implementation Method 1
causing the portable multifunction device to vibrate for 300 ms or less, thereby signaling to the user that the continuous touch has been recognized
Data Source
AI summary
A method, an application launcher, an operating system and a portable multifunction device, in which a long touch of a touch-sensitive display causes the portable multifunction device to (a) briefly vibrate, thereby signaling to the user that the continuous touch has been recognized by the portable multifunction device, and (b) perform an action in a GUI of the portable multifunction device, based on a location of the long touch.