Edge-Actuated Tactile Display Module for Uniform Haptic Feedback
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Solution Overview
Problem
Existing tactile feedback systems for touch display screens lack uniformity and aesthetics, particularly in large-sized onboard display systems, and fail to effectively generate varied tactile sensations for enhanced human-machine interaction.
Innovation Solution
A tactile-feedback module comprising a touch display panel, a cover plate, and actuators adjacent to the edge of the panel, which vibrate in response to driving signals to generate tactile feedback, with actuators arranged in groups to produce varying frequencies and spacings for enhanced tactile sense and aesthetics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If actuators are disposed at the center of the touch display panel, then the tactile feedback can be generated, but the aesthetics and uniformity are compromised due to visible components and uneven vibration distribution
Solution Approach 1:
The actuators are extracted from the central display area and relocated to the edge of the touch display panel. This extraction removes the visually intrusive components from the aesthetic field while preserving their functional capability to generate tactile feedback through vibration of the cover plate.
Solution Approach 2:
The actuator placement transitions from a two-dimensional central position to a one-dimensional edge position along the panel perimeter. This dimensional relocation achieves uniform vibration distribution across the display surface while maintaining aesthetic integrity by positioning actuators at the boundary rather than the center.
2Adaptability or versatility
If a single actuator is used, then the structure is simple, but the tactile feedback lacks variation and richness
Solution Approach 1:
The actuator system is segmented into multiple independent actuators positioned at different edge locations of the touch display panel. Each actuator can be independently controlled to generate vibrations at different frequencies and amplitudes, enabling diverse tactile feedback patterns such as localized vibrations, sweeping patterns, and multi-frequency combinations.
Solution Approach 2:
The multiple actuators are dynamically controlled with varying frequencies, amplitudes, and timing patterns to create rich tactile experiences. The system can dynamically adjust which actuators are active and at what intensity levels, providing adaptable tactile feedback for different interaction scenarios.
3Manufacturing precision
If actuators are placed away from the edge, then the assembly is easier, but the tactile uniformity across the display surface is reduced
Solution Approach 1:
The actuators are positioned along the one-dimensional edge perimeter rather than in the two-dimensional central area. This edge positioning creates uniform radial vibration patterns that propagate across the entire display surface, achieving tactile uniformity while the edge location provides natural assembly reference points that simplify manufacturing.
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 module enhances the uniformity and intensity of tactile sensations, improves the aesthetics, and enables rich variations in tactile feedback, thereby improving human-machine interaction and safety in onboard display systems.
Implementation Method 1
the actuators are configured to, in response to a driving signal, drive the cover plate to vibrate, to generate tactile feedback at a surface of the cover plate away from the touch display panel
Data Source
AI summary
A tactile-feedback module, a driving method thereof and a tactile-feedback device are provided, which relate to the technical field of electronics. The tactile-feedback module includes: a touch display panel, including a display surface; a cover plate disposed at one side of the touch display panel and adjacent to the display surface; and a plurality of actuators disposed at a same side of the cover plate as the touch display panel, wherein the actuators are configured to, in response to a driving signal, drive the cover plate to vibrate, to generate tactile feedback at a surface of the cover plate away from the touch display panel; wherein the actuators are adjacent to an edge of the touch display panel.