Haptic Feedback for Touchscreen Controls with Dynamic Adjustment Rates
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Solution Overview
Problem
Conventional methods of providing haptic feedback in electronic devices with touch-sensitive surfaces are not as effective as they could be, leading to inefficiencies and user confusion in understanding the connection between inputs and device responses.
Innovation Solution
The implementation of methods and interfaces that provide haptic feedback by adjusting adjustment rates based on contact movement, generating tactile outputs when a threshold is reached, and varying adjustment rates without tactile outputs for lesser movements, enhancing user interaction with devices like touchpads and touch-screen displays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If conventional haptic feedback methods are used, then basic tactile output is provided, but user understanding of input-device response connection is unclear and efficiency is reduced
Solution Approach 1:
The patent implements dynamic haptic feedback that provides real-time tactile information to users during interactions with adjustable controls. The system generates haptic outputs that correspond to the current state of controls (sliders, scrubbers, etc.), enabling users to understand the connection between their inputs and device responses through tactile cues. This feedback mechanism reduces information loss by making system state visible through touch.
Solution Approach 2:
The patent extends the concept of visual feedback (color changes) to the haptic domain by using tactile output patterns to indicate different states and thresholds. Just as color changes provide visual information about system state, the patent uses varying haptic patterns (intensity, frequency, duration) to communicate control state, threshold crossing, and operational feedback to users through touch.
2Reliability
If haptic feedback is provided for every threshold crossing, then user feedback is clear, but number of tactile outputs increases
Solution Approach 1:
The patent applies local quality by providing haptic feedback selectively at specific locations in the interaction space (threshold crossings) rather than uniformly across all interactions. The system generates haptic outputs only when meaningful state changes occur (e.g., crossing thresholds, reaching targets), rather than continuously, thus maintaining feedback clarity while reducing overall output complexity.
Solution Approach 2:
The patent uses partial action by providing haptic feedback for only the most significant events (threshold crossings, target achievements) rather than all possible interactions. This selective feedback approach maintains reliability for critical operations while avoiding excessive tactile outputs that would increase device complexity and user cognitive load.
3Speed
If adjustment rate is increased for faster control, then operational speed improves, but user precision in control decreases
Solution Approach 1:
The patent implements dynamic adjustment rates that adapt based on user interaction context and proximity to thresholds. The system can increase adjustment rate when user is far from thresholds (enabling faster operation) and decrease it when approaching thresholds (enabling precise control). This dynamic behavior resolves the contradiction by making the adjustment rate flexible rather than fixed.
Solution Approach 2:
The patent maintains continuous useful action by providing smooth, continuous haptic feedback during control adjustments, regardless of the instantaneous adjustment rate. This continuous feedback helps users maintain precision even when adjustment rates vary, as the haptic information continuously communicates control state and proximity to thresholds throughout 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 approach improves the efficiency and user satisfaction by reducing the number and nature of user inputs, providing clearer feedback on device operations, and enhancing the human-machine interface.
Implementation Method 1
one or more tactile output generators for generating tactile outputs
Data Source
AI summary
An electronic device with a touch-sensitive surface, a display, and tactile output generator(s) displays a user interface including an adjustable control. The device detects a contact on the adjustable control, where movement of the contact away from the adjustable control changes an adjustment rate for adjusting the adjustable control based on movement of the contact. While continuously detecting the contact, the device detects a movement of the contact. In accordance with a determination that the movement moves more than a threshold amount away from the adjustable control, where the first threshold amount of movement triggers a transition from a first adjustment rate to a second adjustment rate, the device generates a tactile output when reaching the threshold amount and adjusts the adjustable control at the second adjustment rate. Otherwise, the device adjusts the adjustable control at the first adjustment rate without generating any tactile output.