Adaptive Tactile Feedback Control for Display Devices
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Solution Overview
Problem
Conventional tactile user interfaces in display devices provide only constant tactile feedback, making it difficult to adaptively respond to user control operations.
Innovation Solution
A display device that generates adaptive tactile feedback based on user control operations, providing preset feedback on a per-region basis and continuous feedback during user gestures, with the ability to lock tactile feedback for constant feedback while controlling an object.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If constant tactile feedback is provided, then the user interface is simple to implement, but the system cannot adaptively respond to user control operations
Solution Approach 1:
The tactile feedback is made dynamic by adjusting its characteristics (frequency, amplitude, duration) based on real-time detection of user control operations. The system transitions from static constant feedback to dynamic adaptive feedback that responds to touch gestures, drag operations, and other user interactions, thereby improving adaptability without requiring complete system redesign
Solution Approach 2:
The system implements a feedback mechanism where user control operations are detected and used to modify tactile feedback in real-time. The controller monitors user interactions and adjusts the haptic output accordingly, creating a closed-loop system that adapts to user behavior. This feedback approach enables adaptive response while maintaining manageable system complexity through iterative adjustment rather than complex parallel processing
2Ease of operation
If preset tactile feedback is provided on a per region basis, then the user interface provides detailed localized feedback, but the device complexity increases
Solution Approach 1:
The display surface is segmented into multiple regions, each associated with specific tactile feedback characteristics. This segmentation allows the system to provide localized feedback corresponding to different functional areas (e.g., buttons, sliders, icons) without requiring a completely complex system. Each region can be independently configured with appropriate haptic properties, making the complexity manageable through modular design
Solution Approach 2:
Different regions of the display are assigned different tactile feedback qualities to match their functional purposes. For example, selection areas provide one type of haptic feedback while drag areas provide another. This local quality differentiation enhances ease of operation by providing context-appropriate feedback without requiring uniform complex feedback across the entire device, thus managing overall system complexity
3Ease of operation
If continuous tactile feedback is provided during user gestures, then the user interaction is smooth and responsive, but the energy consumption increases
Solution Approach 1:
Instead of providing continuously constant tactile feedback, the system uses periodic action by activating feedback only during significant user interaction moments (touch down, drag, lift). The feedback is provided in discrete periods corresponding to operational phases rather than continuous operation. This reduces energy consumption while maintaining smooth interaction because the feedback is timed to coincide with user actions rather than running continuously
Solution Approach 2:
The system maintains continuity of useful action by ensuring tactile feedback is provided throughout the entire user gesture sequence (from initial touch to final lift), even though the feedback intensity may vary. This continuous presence of useful feedback enhances ease of operation by maintaining engagement throughout the interaction, while the system manages energy consumption by adjusting feedback intensity based on interaction phase rather than providing maximum feedback continuously
Data Source
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AI summary
Disclosed is a display device that provides a user with tactile feedback using a tactile user interface. The display device includes a display unit, a tactile feedback unit, and a controller. The controller detects a first control input selecting a first object displayed on the display unit, detects a second control input controlling the first object that is consecutive to the first control input, controls the first object in response to the second control input, generates first tactile feedback according to properties of the first object in response to the second control input, detects a third control input controlling the first object that is consecutive to the second control input, the third control input being detected in a region of a second object displayed on the display unit, and maintains the first tactile feedback in response to the third control input while the first object is controlled by the third control input.