Rollable Touchscreen Haptic Control for Uniform Feedback
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Solution Overview
Problem
Generating haptic feedback on a flexible, rollable touchscreen is challenging as the impulse from the actuator affects the entire display, with a greater proportion converted into deformation rather than translational movement, leading to reduced haptic feedback as the display is extended.
Innovation Solution
A display system with a motor that converts bending or rolling movements into translational movements, featuring an electronic unit that detects touch and generates a pulse-like haptic control, allowing for homogeneous haptic feedback regardless of the display's extension path, using a motor that can be controlled to adjust the haptic impulse based on the extension distance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the display is extended further from the housing, then the translational movement increases, but the haptic feedback perception decreases
Solution Approach 1:
The control unit dynamically adjusts the motor control parameters based on the detected extension distance. As the display extends further, the system modifies the haptic impulse characteristics (strength, duration, frequency) to compensate for the reduced perception, maintaining consistent haptic feedback quality across the full extension range
Solution Approach 2:
The system changes the parameters of the haptic impulse generated by the motor according to the extension distance. The control unit modifies at least one parameter of the haptic impulse (such as amplitude, duration, or frequency) based on the detected position, ensuring that the haptic feedback remains perceptible and consistent regardless of how far the display is extended
2Device complexity
If the same motor control is used regardless of extension distance, then the control simplicity is maintained, but the haptic feedback becomes non-uniform
Solution Approach 1:
The system employs a feedback mechanism where a detection device continuously monitors the extension distance of the display and provides this information to the control unit. The control unit then adjusts the motor control parameters based on this feedback, creating a closed-loop control system that maintains uniform haptic feedback across different extension positions
Solution Approach 2:
The control unit is pre-programmed with adjustment strategies for different extension distances. Before generating a haptic impulse, the system detects the current extension distance and preliminarily adjusts the motor control parameters accordingly, ensuring that the haptic feedback is optimized for the current state without requiring real-time complex calculations
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
The system provides consistent and adjustable haptic feedback across different extension paths, counteracting the reduced perception of haptic feedback when the display is retracted and avoiding excessive feedback when fully extended, ensuring a uniform user experience.
Implementation Method 1
a motor with an electrical control, wherein the display can be extended from the housing via the electrical control of the motor, wherein the motor is configured to generate a bending or rolling movement of the display
Implementation Method 2
the motor is configured to generate haptic feedback
Data Source
Figure 1a~1d
Figure 2
Figure 3a~3b
AI summary
The present invention relates to a display system (10) comprising a display (11) with a flexible touchscreen (12), a housing (13) and a motor (14) with an electric control action, wherein the display (11) can be moved out of the housing (13) by the control action of the electric motor (14), and wherein the motor (14) is configured to generate haptic feedback, with the display system (10) comprising an electronic unit which is configured to detect a touch on the touchscreen (12) and to trigger an electric haptic control action by the motor on the basis of the touch detected.